GB/T 50315-2000 Technical standard for on-site inspection of masonry works
Some standard content:
Engineering construction standard full text information system
National Standard of the People's Republic of China
GB/T50315—2000
Technical standard for site testing of engineering construction standards
2000—07—06
2000—10—01
State Administration of Quality and Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering construction standard full text information system
Jointly issued
Engineering construction standard full text information system
National Standard of the People's Republic of China
Technical standard for site testing of engineering construction standards engineeringGB/T50315—2000
Editing department: Sichuan Provincial Construction Committee
Approving department: Ministry of Construction of the People's Republic of ChinaEffective date: October 1, 2000
2000 Beijing
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Notice on the Release of National Standards
"Technical Standards for On-site Inspection of Masonry Engineering" Construction Standards [2000] No. 154
In accordance with the requirements of the State Planning Commission's "1992 Engineering Construction Standards Formulation and Revision Plan" (Annex 2 of Planning Comprehensive [1992] No. 490), the "Technical Standards for On-site Inspection of Masonry Engineering" jointly formulated by the Sichuan Provincial Construction Committee and relevant departments was reviewed and approved as a recommended national standard by relevant departments, with the number GB/T50315-2000, and will be implemented on October 1, 2000.
This standard is managed by the Sichuan Provincial Construction Committee, interpreted by the Sichuan Provincial Academy of Building Science, and published by the China Construction Industry Press under the organization of the Standard and Quota Research Institute of the Ministry of Construction.
Ministry of Construction of the People's Republic of China
July 6, 2000
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Engineering Construction National Standard "Technical Standard for On-site Inspection of Masonry Engineering" is edited by the Sichuan Provincial Construction Committee in accordance with the requirements of the State Planning Commission's Document No. 490 [1992], and is specifically compiled by the Sichuan Provincial Academy of Building Science and other relevant units. This standard was reviewed by relevant departments, approved by the Ministry of Construction in Document No. 154 [2000], and jointly issued with the State Administration of Quality and Technical Supervision. During the preparation of this standard, the preparation team conducted extensive and in-depth investigations and studies, carefully summarized the practical experience and theoretical research results of my country's masonry engineering detection technology, widely solicited opinions from relevant units, experts and actual workers across the country, and collected, analyzed, studied and referenced foreign standards and international standards. This standard is managed by the Sichuan Provincial Construction Committee, and the specific interpretation work is the responsibility of the Sichuan Provincial Academy of Building Sciences. In the field of masonry on-site detection, the formulation of such standards is the first at home and abroad, and there will definitely be many shortcomings. In order to further improve the level of this standard, please pay attention to summarizing experience and accumulating information during the implementation process, and send questions and opinions to the Sichuan Provincial Academy of Building Sciences (No. 55, Section 3, North Section, First Ring Road, Chengdu, Postal Code 610081) at any time for reference during revision. List of editorial units, participating units and main drafters of this standard Editorial unit: Sichuan Academy of Architectural Science Participating units: Xi'an University of Architecture and Technology
Shaanxi Academy of Architectural Science
Henan Academy of Architectural Science
Ningxia Hui Autonomous Region Institute of Architectural Engineering Hunan University
Main drafters: Wang Yongwei
Li Shuangzhu
Engineering Construction Standards Full-text Information System
Hou Ruxin
Zhou Guomin
Yang Yaqing
Wang Xiuyi
Shi Chuxian
Guo Qikun
Wang Qinglin
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Terms and Symbols
2.1Terms
2.2Symbols
Basic Provisions
Specialized Business
3.1Testing Procedures and Work Contents
3.2Testing Units, Test Areas and Test Points
3.3Classification of Test Methods and Principles of Selection..·……In-situ Axial Compression Method
General Provisions
4.2Technical Specifications of Test Equipment
4.3Testing Procedures||tt| |4.4 Data analysis
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Flat top method…
General provisions
5.2 Technical indicators of test equipment
Test steps
Data analysis
In-situ single shear method
General provisions
6.2 Technical indicators of test equipment
6.3 Test steps
6.4 Data analysis
In-situ single brick double shear method
General provisions
7.2 Test equipment Technical indicators of
7.3 Test steps
Engineering construction standard full-text information system
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Engineering construction standard full-text information system
Data analysis
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Push-out method
General provisions
8.2 Technical indicators of test equipment
8.3 Test steps
8.4 Data analysis
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Simple compression method..
General provisions
Technical indicators of test equipment
9.3 Test steps
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9.4 Data analysis
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Mortar sheet shear method
General provisions
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Technical indicators of test equipment
Test steps Steps
Data analysis
Rebound method
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General provisions
Technical indicators of test equipment
Test steps
Data analysis
Point charge method
General provisions
Technical indicators of test equipment
Test steps
Data analysis
Nail method
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***************... .
General provisions
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C000000000060600000600000000000000600000001000Technical indicators of test equipment…
Test steps
Data analysis
Engineering construction standard full-text information system
Engineering construction standard full-text information system
Strength estimation||tt| |065600008000000100005100
Appendix A
Appendix B
Method for determination and verification of standard injection volume
Terms used in this standard
Engineering construction standard full text information system
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Engineering construction standard full text information system
1 General provisions
1.0.1 This standard is formulated to implement the national technical policies and ensure advanced technology, accurate data, safety and reliability in the on-site inspection of masonry projects. 1.0.2 This standard applies to the on-site testing and strength estimation of brick masonry and mortar in the following masonry projects:
1 For new construction projects, the testing and evaluation of the strength of mortar or brick masonry shall be carried out in accordance with the current national standards "Code for Construction and Acceptance of Masonry Projects" GB50203, "Standard for Quality Inspection and Evaluation of Building Projects" GBJ301, "Standard for Test Methods for Basic Mechanical Properties of Masonry" GBJ129, etc. When encountering one of the following situations, the strength of mortar or brick masonry shall be tested and estimated in accordance with this standard:
1) The mortar test block lacks representativeness or the number of test pieces is insufficient; 2) There is doubt or dispute about the test results of the mortar test block, and it is necessary to determine the actual compressive and shear strength of the masonry;
3) There is an engineering accident, or there is doubt and dispute about the construction quality, and it is necessary to further analyze the strength of bricks, mortar and masonry. Note: The strength grade of bricks shall be sampled and tested according to the current product standards. 2 For existing masonry projects, the strength of mortar or working stress, elastic modulus and strength of brick masonry shall be tested and estimated in accordance with this standard when conducting the following reliability appraisals: 1) static safety appraisal and dangerous building appraisal or other emergency appraisals; 2) earthquake resistance appraisal;
3) reliability appraisal before major repairs;
4) special appraisal before changing the use, reconstruction, adding floors or expanding a house. 1.0.3 In addition to implementing this standard, on-site testing of brick masonry shall also comply with the provisions of relevant national standards in force.
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
2 Terms and Symbols
2.1.1 Testing element
Masonry with the same material type and design strength grade for each floor and a total area not exceeding 250m
2.1.2 Testing zone
In a testing unit, one or more testing areas are randomly arranged according to the requirements of the testing method. One component (single wall, column) can be used as a testing zone.
2.1.3 Testing point
In a testing zone, one or more testing points are randomly arranged according to the requirements of the testing method.
Go to The method of axial compression instruments on brick-2.1.4 In-situ axial compression method
word wall
The method of using an in-situ press to conduct a compression test on the wall to test the compressive strength of masonry, also referred to as the axial compression method.
2.1.5 Flat hydraulic jack method The method of using a flat hydraulic jack to conduct a compression test on the wall to test the compressive stress, elastic modulus and compressive strength of masonry, also referred to as the flat jack method. 2.1.6 The method of single shear for a long horizontal mortar joint on brickword wall is a method of testing the shear strength of masonry by conducting a shear test along a single horizontal mortar joint on the wall, also referred to as the in-situ single shear method.
2.1.7 The method of double shear for a single brick along a horizontal mortar joint on brickword wall is a method of testing the shear strength of masonry by conducting a double-sided shear test on a single brick on the wall using an in-situ shear instrument.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2.1.8 The method of push out is a method of using a push out instrument to push a single brick horizontally from the wall, measure the horizontal thrust and the mortar fullness under the pushed out brick, and use this to estimate the compressive strength of the masonry mortar. 2.1.9 Cylinder compression method The method of column compression is to crush the sampled mortar, dry it and sieve it into particles that meet certain grading requirements, load it into a pressure cylinder and apply cylinder pressure load, then detect its degree of damage and express it with cylinder pressure ratio to estimate its compressive strength. 2.1.10 Mortar flake shear method The method of a mortar flake uses a mortar strength meter to detect the shear strength of the mortar flake to estimate the compressive strength of the masonry mortar.
2.1.11 Rebound method The method of mortar rebound tester uses a mortar rebound tester to detect the surface hardness of the mortar in the wall, and estimates its strength based on the rebound value and carbonization depth.
2.1.12 Point load method The method of point load applies a point load on the large surface of the mortar flake to estimate the compressive strength of the masonry mortar.
2.1.13 The method of powder actuated shot The method of using a nail gun to shoot nails into the horizontal mortar joints of the wall, and estimating the compressive strength of masonry mortar based on the amount of nails shot into the wall. 2.1.14 Masonry between two channels The masonry between two horizontal grooves when the compressive strength of masonry is tested on the brick wall using the in-situ axial compression method and the flat top method. 2.1.15 Cylindrical compressive values When the cylinder pressure method is used to test the strength of mortar, the ratio of the cumulative sieve residue left on the sieve with an aperture of 5 mm to the total amount of the sample after the mortar sample is subjected to the cylinder pressure test and sieved: referred to as the cylinder pressure ratio.
2.2.1 Geometric parameters
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Engineering Construction Standard Full-text Information System
Cross-sectional area of a component or specimen;
Width; side length of specimen section,
Height; height of specimen section;
1Length; amount of nails shot in nailing method;
d——carbonization depth of mortar;
—radius; effective radius of point load method;
t—thickness; specimen thickness.
2.2.2 Actions, effects and resistance, calculation indicators - measured destructive load value;
- average masonry compressive strength;
- average masonry shear strength;
- mortar shear strength;
f - brick compressive strength value;
- mortar compressive strength value;
average compressive stress of the wall above the measuring point.
2.2.3 Coefficient
5i——Conversion coefficient for masonry compressive strength determined by in-situ axial compression method; Conversion coefficient for masonry compressive strength determined by flat top method; Brick type correction coefficient for push-out method;
-Mortar fullness correction coefficient for push-out method; 5——Load action radius correction coefficient for point load method; —Test specimen thickness correction coefficient for point load method; 2.2.4 Others
B—Mortar fullness of horizontal mortar joints;
T—Cylinder pressure ratio in cylinder pressure method;
R—Mortar rebound value;
n——Number, sample capacity.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
3 Basic Provisions
3.1 Inspection Procedure and Work Content
3.1.1 The procedure of on-site inspection work shall be carried out according to the following block diagram: Accept the entrustment
Determine the purpose, content and scope of inspection
Determine the inspection method
Equipment and instrument calibration
Supplementary test
Calculation, analysis, estimation
Inspection report
3.1.2 The investigation stage includes the following work content: 1 Collect the original design drawings, construction acceptance materials, brick and mortar varieties and relevant raw material test data of the inspected project. 2 On-site investigation of the structural form, environmental conditions, changes during use, masonry quality and existing problems of the project. 3 Further clarify the reasons for the inspection and the specific requirements of the entrusting party. 3.1.3 One or more inspection methods should be selected based on the investigation results and the determined inspection purpose, content and scope. Divide the inspected project into inspection units and determine the construction standards of the survey area engineering.3 In addition to implementing this standard, on-site testing of brick masonry shall also comply with the provisions of relevant national standards in force.
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
2 Terms and Symbols
2.1.1 Testing element
Masonry with the same material type and design strength grade on each floor and a total area not exceeding 250m.
2.1.2 Testing zone
In a testing unit, one or more testing areas are randomly arranged according to the requirements of the testing method. One component (single wall, column) can be regarded as a testing zone.
2.1.3 Testing point
In a testing zone, one or more testing points are randomly arranged according to the requirements of the testing method.
Go to The method of axial compression instruments on brick-2.1.4 In-situ axial compression method
word wall
The method of using an in-situ press to carry out a compression test on the wall to detect the compressive strength of the masonry, also referred to as the axial compression method.
2.1.5 Flat hydraulic jacking method The method of using a flat hydraulic jack to carry out a compression test on the wall to detect the compressive stress, elastic modulus and compressive strength of the masonry, also referred to as the flat jacking method. 2.1.6 In-situ masonry through-seam single shear method The method of single shear a long horizontal mortar joint on brickword wall The method of carrying out a shear test along a single horizontal mortar joint on the wall to detect the shear strength of the masonry, also referred to as the in-situ single shear method.
2.1.7 In-situ single brick double shear method
The method of double shear for a single brick along horizontal mortar joint brickword wall The method of using an in-situ shear instrument to carry out a double-sided shear test on a single brick on the wall to test the shear strength of masonry.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2.1.8 Push-out method The method of using a push-out instrument to push a single brick horizontally from the wall, measure the horizontal thrust and the mortar fullness under the pushed-out brick, and use this to estimate the compressive strength of the masonry mortar. 2.1.9 Cylinder compression method The method of crushing, drying and sieving the sampled mortar into particles that meet certain grading requirements, loading it into a pressure cylinder and applying cylinder pressure load, and then testing its damage degree, which is expressed as cylinder pressure ratio, and its compressive strength is estimated. 2.1.10 Mortar flake shear method The method of mortar flake uses a mortar strength tester to test the shear strength of the mortar flake, and infers the compressive strength of the masonry mortar.
2.1.11 Rebound method The method of mortar rebound tester uses a mortar rebound tester to test the surface hardness of the mortar in the wall, and infers its strength based on the rebound value and carbonization depth.
2.1.12 Point load method The method of point load applies a point load on the large surface of the mortar flake to infer the compressive strength of the masonry mortar.
2.1.13 Powder actuated shot method The method of using a nail gun to shoot nails into the horizontal mortar joints of the wall, and inferring the compressive strength of the masonry mortar based on the amount of nails shot in groups. 2.1.14 Masonry between two channels When the compressive strength of masonry is tested on a brick wall by the in-situ axial compression method and the flat top method, the masonry between two horizontal grooves is used. 2.1.15 Cylindrical compressive values When the mortar strength is tested by the cylinder pressure method, the ratio of the cumulative sieve residue on the 5mm sieve to the total amount of the sample after the mortar sample is subjected to the cylinder pressure test and sieved: referred to as the cylinder pressure ratio.
2.2.1 Geometric parameters
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Cross-sectional area of a component or specimen;
Width; side length of specimen section,
Height; height of specimen section;
1Length; amount of nails shot in nailing method;
d——carbonization depth of mortar;
—radius; effective radius of point load method;
t—thickness; specimen thickness.
2.2.2 Actions, effects and resistance, calculation indicators - measured destructive load value;
- average masonry compressive strength;
- average masonry shear strength;
- mortar shear strength;
f - brick compressive strength value;
- mortar compressive strength value;
average compressive stress of the wall above the measuring point.
2.2.3 Coefficient
5i——Conversion coefficient for masonry compressive strength determined by in-situ axial compression method; Conversion coefficient for masonry compressive strength determined by flat top method; Brick type correction coefficient for push-out method;
-Mortar fullness correction coefficient for push-out method; 5——Load action radius correction coefficient for point load method; —Test specimen thickness correction coefficient for point load method; 2.2.4 Others
B—Mortar fullness of horizontal mortar joints;
T—Cylinder pressure ratio in cylinder pressure method;
R—Mortar rebound value;
n——Number, sample capacity.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
3 Basic Provisions
3.1 Inspection Procedure and Work Content
3.1.1 The procedure of on-site inspection work shall be carried out according to the following block diagram: Accept the entrustment
Determine the purpose, content and scope of inspection
Determine the inspection method
Equipment and instrument calibration
Supplementary test
Calculation, analysis, estimation
Inspection report
3.1.2 The investigation stage includes the following work content: 1 Collect the original design drawings, construction acceptance materials, brick and mortar varieties and relevant raw material test data of the inspected project. 2 On-site investigation of the structural form, environmental conditions, changes during use, masonry quality and existing problems of the project. 3 Further clarify the reasons for the inspection and the specific requirements of the entrusting party. 3.1.3 One or more inspection methods should be selected based on the investigation results and the determined inspection purpose, content and scope. Divide the inspected project into inspection units and determine the construction standards of the survey area engineering.3 In addition to implementing this standard, on-site testing of brick masonry shall also comply with the provisions of relevant national standards in force.
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
2 Terms and Symbols
2.1.1 Testing element
Masonry with the same material type and design strength grade on each floor and a total area not exceeding 250m.
2.1.2 Testing zone
In a testing unit, one or more testing areas are randomly arranged according to the requirements of the testing method. One component (single wall, column) can be regarded as a testing zone.
2.1.3 Testing point
In a testing zone, one or more testing points are randomly arranged according to the requirements of the testing method.
Go to The method of axial compression instruments on brick-2.1.4 In-situ axial compression method
word wall
The method of using an in-situ press to carry out a compression test on the wall to detect the compressive strength of the masonry, also referred to as the axial compression method.
2.1.5 Flat hydraulic jacking method The method of using a flat hydraulic jack to carry out a compression test on the wall to detect the compressive stress, elastic modulus and compressive strength of the masonry, also referred to as the flat jacking method. 2.1.6 In-situ masonry through-seam single shear method The method of single shear a long horizontal mortar joint on brickword wall The method of carrying out a shear test along a single horizontal mortar joint on the wall to detect the shear strength of the masonry, also referred to as the in-situ single shear method.
2.1.7 In-situ single brick double shear method
The method of double shear for a single brick along horizontal mortar joint brickword wall The method of using an in-situ shear instrument to carry out a double-sided shear test on a single brick on the wall to test the shear strength of masonry.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2.1.8 Push-out method The method of using a push-out instrument to push a single brick horizontally from the wall, measure the horizontal thrust and the mortar fullness under the pushed-out brick, and use this to estimate the compressive strength of the masonry mortar. 2.1.9 Cylinder compression method The method of crushing, drying and sieving the sampled mortar into particles that meet certain grading requirements, loading it into a pressure cylinder and applying cylinder pressure load, and then testing its damage degree, which is expressed as cylinder pressure ratio, and its compressive strength is estimated. 2.1.10 Mortar flake shear method The method of mortar flake uses a mortar strength tester to test the shear strength of the mortar flake, and infers the compressive strength of the masonry mortar.
2.1.11 Rebound method The method of mortar rebound tester uses a mortar rebound tester to test the surface hardness of the mortar in the wall, and infers its strength based on the rebound value and carbonization depth.
2.1.12 Point load method The method of point load applies a point load on the large surface of the mortar flake to infer the compressive strength of the masonry mortar.
2.1.13 Powder actuated shot method The method of using a nail gun to shoot nails into the horizontal mortar joints of the wall, and inferring the compressive strength of the masonry mortar based on the amount of nails shot in groups. 2.1.14 Masonry between two channels When the compressive strength of masonry is tested on a brick wall by the in-situ axial compression method and the flat top method, the masonry between two horizontal grooves is used. 2.1.15 Cylindrical compressive values When the mortar strength is tested by the cylinder pressure method, the ratio of the cumulative sieve residue on the 5mm sieve to the total amount of the sample after the mortar sample is subjected to the cylinder pressure test and sieved: referred to as the cylinder pressure ratio.
2.2.1 Geometric parameters
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Cross-sectional area of a component or specimen;
Width; side length of specimen section,
Height; height of specimen section;
1Length; amount of nails shot in nailing method;
d——carbonization depth of mortar;
—radius; effective radius of point load method;
t—thickness; specimen thickness.
2.2.2 Actions, effects and resistance, calculation indicators - measured destructive load value;
- average masonry compressive strength;
- average masonry shear strength;
- mortar shear strength;
f - brick compressive strength value;
- mortar compressive strength value;
average compressive stress of the wall above the measuring point.
2.2.3 Coefficient
5i——Conversion coefficient for masonry compressive strength determined by in-situ axial compression method; Conversion coefficient for masonry compressive strength determined by flat top method; Brick type correction coefficient for push-out method;
-Mortar fullness correction coefficient for push-out method; 5——Load action radius correction coefficient for point load method; —Test specimen thickness correction coefficient for point load method; 2.2.4 Others
B—Mortar fullness of horizontal mortar joints;
T—Cylinder pressure ratio in cylinder pressure method;
R—Mortar rebound value;
n——Number, sample capacity.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
3 Basic Provisions
3.1 Inspection Procedure and Work Content
3.1.1 The procedure of on-site inspection work shall be carried out according to the following block diagram: Accept the entrustment
Determine the purpose, content and scope of inspection
Determine the inspection method
Equipment and instrument calibration
Supplementary test
Calculation, analysis, estimation
Inspection report
3.1.2 The investigation stage includes the following work content: 1 Collect the original design drawings, construction acceptance materials, brick and mortar varieties and relevant raw material test data of the inspected project. 2 On-site investigation of the structural form, environmental conditions, changes during use, masonry quality and existing problems of the project. 3 Further clarify the reasons for the inspection and the specific requirements of the entrusting party. 3.1.3 One or more inspection methods should be selected based on the investigation results and the determined inspection purpose, content and scope. Divide the inspected project into inspection units and determine the construction standards of the survey area engineering.7 In-situ single brick double shear method
The method of double shear for a single brick along horizontal mortar joint brickword wall is a method of measuring the shear strength of masonry by using an in-situ shear instrument to carry out a double-sided shear test on a single brick on the wall.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2.1.8 Push-out method The method of push-out is a method of using a push-out instrument to push a single brick horizontally from the wall, and measure the horizontal thrust and the mortar fullness under the pushed-out brick, thereby estimating the compressive strength of the masonry mortar. 2.1.9 Cylinder compression method The method of column compression is a method of crushing, drying and sieving the sampled mortar into particles that meet certain grading requirements, loading it into a pressure cylinder and applying a cylinder pressure load, and then detecting its degree of damage, which is expressed as a cylinder pressure ratio, thereby estimating its compressive strength. 2.1.10 Mortar flake shear method The method of mortar flake uses a mortar strength tester to test the shear strength of the mortar flake, and infers the compressive strength of the masonry mortar.
2.1.11 Rebound method The method of mortar rebound tester uses a mortar rebound tester to test the surface hardness of the mortar in the wall, and infers its strength based on the rebound value and carbonization depth.
2.1.12 Point load method The method of point load applies a point load on the large surface of the mortar flake to infer the compressive strength of the masonry mortar.
2.1.13 Powder actuated shot method The method of using a nail gun to shoot nails into the horizontal mortar joints of the wall, and inferring the compressive strength of the masonry mortar based on the amount of nails shot in groups. 2.1.14 Masonry between two channels When the compressive strength of masonry is tested on a brick wall by the in-situ axial compression method and the flat top method, the masonry between two horizontal grooves is used. 2.1.15 Cylindrical compressive values When the mortar strength is tested by the cylinder pressure method, the ratio of the cumulative sieve residue on the 5mm sieve to the total amount of the sample after the mortar sample is subjected to the cylinder pressure test and sieved: referred to as the cylinder pressure ratio.
2.2.1 Geometric parameters
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Cross-sectional area of a component or specimen;
Width; side length of specimen section,
Height; height of specimen section;
1Length; amount of nails shot in nailing method;
d——carbonization depth of mortar;
—radius; effective radius of point load method;
t—thickness; specimen thickness.
2.2.2 Actions, effects and resistance, calculation indicators - measured destructive load value;
- average masonry compressive strength;
- average masonry shear strength;
- mortar shear strength;
f - brick compressive strength value;
- mortar compressive strength value;
average compressive stress of the wall above the measuring point.
2.2.3 Coefficient
5i——Conversion coefficient for masonry compressive strength determined by in-situ axial compression method; Conversion coefficient for masonry compressive strength determined by flat top method; Brick type correction coefficient for push-out method;
-Mortar fullness correction coefficient for push-out method; 5——Load action radius correction coefficient for point load method; —Test specimen thickness correction coefficient for point load method; 2.2.4 Others
B—Mortar fullness of horizontal mortar joints;
T—Cylinder pressure ratio in cylinder pressure method;
R—Mortar rebound value;
n——Number, sample capacity.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
3 Basic Provisions
3.1 Inspection Procedure and Work Content
3.1.1 The procedure of on-site inspection work shall be carried out according to the following block diagram: Accept the entrustment
Determine the purpose, content and scope of inspection
Determine the inspection method
Equipment and instrument calibration
Supplementary test
Calculation, analysis, estimation
Inspection report
3.1.2 The investigation stage includes the following work content: 1 Collect the original design drawings, construction acceptance materials, brick and mortar varieties and relevant raw material test data of the inspected project. 2 On-site investigation of the structural form, environmental conditions, changes during use, masonry quality and existing problems of the project. 3 Further clarify the reasons for the inspection and the specific requirements of the entrusting party. 3.1.3 One or more inspection methods should be selected based on the investigation results and the determined inspection purpose, content and scope. Divide the inspected project into inspection units and determine the construction standards of the survey area engineering.7 In-situ single brick double shear method
The method of double shear for a single brick along horizontal mortar joint brickword wall is a method of measuring the shear strength of masonry by using an in-situ shear instrument to carry out a double-sided shear test on a single brick on the wall.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2.1.8 Push-out method The method of push-out is a method of using a push-out instrument to push a single brick horizontally from the wall, and measure the horizontal thrust and the mortar fullness under the pushed-out brick, thereby estimating the compressive strength of the masonry mortar. 2.1.9 Cylinder compression method The method of column compression is a method of crushing, drying and sieving the sampled mortar into particles that meet certain grading requirements, loading it into a pressure cylinder and applying a cylinder pressure load, and then detecting its degree of damage, which is expressed as a cylinder pressure ratio, thereby estimating its compressive strength. 2.1.10 Mortar flake shear method The method of mortar flake uses a mortar strength tester to test the shear strength of the mortar flake, and infers the compressive strength of the masonry mortar.
2.1.11 Rebound method The method of mortar rebound tester uses a mortar rebound tester to test the surface hardness of the mortar in the wall, and infers its strength based on the rebound value and carbonization depth.
2.1.12 Point load method The method of point load applies a point load on the large surface of the mortar flake to infer the compressive strength of the masonry mortar.
2.1.13 Powder actuated shot method The method of using a nail gun to shoot nails into the horizontal mortar joints of the wall, and inferring the compressive strength of the masonry mortar based on the amount of nails shot in groups. 2.1.14 Masonry between two channels When the compressive strength of masonry is tested on a brick wall by the in-situ axial compression method and the flat top method, the masonry between two horizontal grooves is used. 2.1.15 Cylindrical compressive values When the mortar strength is tested by the cylinder pressure method, the ratio of the cumulative sieve residue on the 5mm sieve to the total amount of the sample after the mortar sample is subjected to the cylinder pressure test and sieved: referred to as the cylinder pressure ratio.
2.2.1 Geometric parameters
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Cross-sectional area of a component or specimen;
Width; side length of specimen section,
Height; height of specimen section;
1Length; amount of nails shot in nailing method;
d——carbonization depth of mortar;
—radius; effective radius of point load method;
t—thickness; specimen thickness.
2.2.2 Actions, effects and resistance, calculation indicators - measured destructive load value;
- average masonry compressive strength;
- average masonry shear strength;
- mortar shear strength;
f - brick compressive strength value;
- mortar compressive strength value;
average compressive stress of the wall above the measuring point.
2.2.3 Coefficient
5i——Conversion coefficient for masonry compressive strength determined by in-situ axial compression method; Conversion coefficient for masonry compressive strength determined by flat top method; Brick type correction coefficient for push-out method;
-Mortar fullness correction coefficient for push-out method; 5——Load action radius correction coefficient for point load method; —Test specimen thickness correction coefficient for point load method; 2.2.4 Others
B—Mortar fullness of horizontal mortar joints;
T—Cylinder pressure ratio in cylinder pressure method;
R—Mortar rebound value;
n——Number, sample capacity.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
3 Basic Provisions
3.1 Inspection Procedure and Work Content
3.1.1 The procedure of on-site inspection work shall be carried out according to the following block diagram: Accept the entrustment
Determine the purpose, content and scope of inspection
Determine the inspection method
Equipment and instrument calibration
Supplementary test
Calculation, analysis, estimation
Inspection report
3.1.2 The investigation stage includes the following work content: 1 Collect the original design drawings, construction acceptance materials, brick and mortar varieties and relevant raw material test data of the inspected project. 2 On-site investigation of the structural form, environmental conditions, changes during use, masonry quality and existing problems of the project. 3 Further clarify the reasons for the inspection and the specific requirements of the entrusting party. 3.1.3 One or more inspection methods should be selected based on the investigation results and the determined inspection purpose, content and scope. Divide the inspected project into inspection units and determine the construction standards of the survey area engineering.4 Others
B—Mortar fullness of horizontal mortar joints;
T—Drum pressure ratio in drum pressure method;
R——Mortar rebound value;
n——Number, sample capacity.
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
3 Basic Provisions
3.1 Testing Procedure and Work Content
3.1.1 The procedure of on-site testing should be carried out according to the following block diagram: Accept the commission
Determine the purpose, content and scope of the test
Determine the test method
Equipment and instrument calibration
Supplementary test
Calculation, analysis, estimation
Test report
3.1.2 The investigation stage includes the following work content: 1 Collect the original design drawings, construction acceptance materials, brick and mortar varieties and test data of related raw materials of the tested project. 2. Conduct on-site investigation of the project's structural form, environmental conditions, changes during use, masonry quality and existing problems. 3. Further clarify the reasons for the inspection and the specific requirements of the client. 3.1.3 Select one or more inspection methods based on the investigation results and the determined inspection purpose, content and scope. Divide the inspected project into inspection units and determine the construction standards for the survey area.4 Others
B—Mortar fullness of horizontal mortar joints;
T—Drum pressure ratio in drum pressure method;
R——Mortar rebound value;
n——Number, sample capacity.
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
3 Basic Provisions
3.1 Testing Procedure and Work Content
3.1.1 The procedure of on-site testing should be carried out according to the following block diagram: Accept the commission
Determine the purpose, content and scope of the test
Determine the test method
Equipment and instrument calibration
Supplementary test
Calculation, analysis, estimation
Test report
3.1.2 The investigation stage includes the following work content: 1 Collect the original design drawings, construction acceptance materials, brick and mortar varieties and test data of related raw materials of the tested project. 2. Conduct on-site investigation of the project's structural form, environmental conditions, changes during use, masonry quality and existing problems. 3. Further clarify the reasons for the inspection and the specific requirements of the client. 3.1.3 Select one or more inspection methods based on the investigation results and the determined inspection purpose, content and scope. Divide the inspected project into inspection units and determine the construction standards for the survey area.
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