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Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
GB50164—92
Standard of Quality Control of Concrete
Concrete
1991—09—29
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full-text Information System
1 Implementation
1992—05—01
Jointly Issued
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Standard of Quality Control of Concrete
50164—92
Editor Department: Former Ministry of Urban and Rural Construction and Environmental Protection of the People's Republic of China Approval Department: People's Republic of China Notice on the promulgation of the national standard "Concrete Quality Control Standard"
Construction Standard [1992] No. 667
All relevant departments of the State Council, the Construction Committees (Construction Departments) of provinces, autonomous regions, and municipalities directly under the Central Government, relevant planning committees, and the Construction Committees of all independently planned cities:
According to the requirements of the State Planning Commission's Document No. [1986] 2630, the "Concrete Quality Control Standard" jointly compiled by the China Academy of Building Research and relevant units has been reviewed by relevant departments. The "Concrete Quality Control Standard" GB50164-92 is now approved as a mandatory national standard and will be implemented from May 1, 1993. This standard is managed by the Ministry of Construction and interpreted by the China Academy of Building Research. The publication and distribution is organized by the Standard and Quota Research Institute of the Ministry of Construction. Ministry of Construction of the People's Republic of China
September 29, 1992
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Preparation Instructions
This standard is prepared by the China Academy of Building Research in conjunction with relevant units in accordance with the requirements of the State Planning Commission's Document No. [1986] 2630. During the preparation process, extensive investigations and studies were conducted on the quality status of concrete and related quality control issues across the country, effective production practice experience and scientific research results were absorbed, and relevant foreign standards were used for reference. After completing the first draft of this standard, the draft for soliciting opinions, and soliciting opinions from relevant units across the country, the draft for submission was completed and the draft was finalized after review.
This standard is divided into four chapters, the main contents of which include: general principles, quality requirements for concrete, preliminary control of concrete quality, production control of concrete quality, etc. This standard is compiled for the first time. During the implementation process, each unit is requested to accumulate information, summarize experience, and send any problems and opinions found to the China Academy of Building Research (100013) at any time for reference in future revisions. Ministry of Construction
September 1992
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Chapter 1
Chapter 2
Quality Requirements for Concrete
Section 1
Section 2
Section 3
Chapter 3
Concrete Mixture
Air Content
Water-Cement Ratio and Cement Content
Uniformity
Concrete Strength
Concrete Durability
#o6606o6660Core
Preliminary Control of Concrete Quality
Section 1
Section 2
Chapter 4
Quality Control of Component Materials|| tt||Admixtures
Admixtures
Determination and control of concrete mix ratio
Production control of concrete quality
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Inspection before pouring
Welcome to the light of the sun
Additional instructions
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Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Chapter 1 General
Article 1.0.1 This standard is formulated to strengthen the quality control of concrete production and construction process, promote technological progress, and ensure the quality of concrete. Article 1.0.2 This standard applies to the quality control of ordinary concrete for industrial and civil buildings.
Article 1.0.3 The quality control of concrete shall include preliminary control, production control and qualified control. The implementation of concrete quality control shall comply with the following provisions: 1. Through the quality inspection and control of raw materials, the determination and control of concrete mix ratio, the quality inspection and control of each process of concrete production and construction, and the qualified inspection and control, the quality of concrete shall meet the specified requirements. 2. During the production and construction process, quality inspection shall be carried out, statistical parameters shall be calculated, various quality management charts shall be applied, dynamic information shall be mastered, the quality of concrete shall be controlled during the entire production and construction period, and measures for improvement and quality improvement shall be formulated in accordance with the upgrading cycle, and the quality control process shall be improved to steadily improve the quality of concrete. 3. It is necessary to equip the corresponding technical personnel and necessary inspection and testing equipment, and establish and improve the necessary technical management and quality control system. Article 1.0.4 In addition to complying with the provisions of this standard, the quality control of concrete shall also comply with the provisions of the current relevant standards. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 2
Concrete Quality Requirements
Section 1 Concrete Mixture
Article 2.1.1 The various quality indicators of concrete mixtures shall be tested in accordance with the following provisions:
1. All kinds of concrete mixtures shall be tested for consistency; 2. The concrete mixtures with air-entraining admixtures shall be tested for air content; 3. The water-cement ratio, cement content and uniformity of the concrete mixtures shall be tested as required.
(I) Consistency
Article 2.1.2 The consistency of concrete mixtures shall be expressed in slump or Vebe consistency. Slump is applicable to plastic and fluid concrete mixtures, and Vebe consistency is applicable to dry and hard concrete mixtures. Its testing method shall be carried out in accordance with the provisions of the current national standard "Test Method for Performance of Ordinary Concrete Mixtures". Article 2.1.3 Concrete mixtures can be divided into 4 grades according to their slump and shall comply with the provisions of Table 2.1.3.
Grading of concrete according to slump
Low plasticity concrete
Plastic concrete
Flowable concrete
High flowability concrete
Slump (mm)
100~150
≥160
Note: The slump test results are expressed to the nearest 10mm when grading and evaluating. Article 2.1.4 Concrete mixtures can be divided into 4 grades according to their Vebe consistency
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Grades and shall comply with the provisions of Table 2.1.4.
Grading of concrete according to Vebe consistency
Article 2.1.5
Super hard concrete
Extra hard concrete
Hard concrete
Semi-hard concrete
Vebe consistency (s)
The allowable deviation of slump or Vebe consistency shall comply with the provisions of Table 2.1.5-1 and Table 2.1.5-2 respectively.
Allowable deviation of slump
Slump (mm）
Table 2.1.5-1
Allowable deviation (mm)
Allowable deviation of Vebe consistency
Vebe consistency (s)
（I）
Table 2.1.5-2
Allowable deviation (s)
The air content of concrete with air-entraining admixtures shall meet the requirements of the design and the construction process of Article 2.1.6. According to the maximum particle size of the coarse aggregate used in concrete, the limit of its air content should not exceed the provisions of Table 2.1.6. Limit value of air content in concrete with air-entraining admixtures Maximum particle size of coarse aggregate (mm)
Engineering Construction Standard Full Text Information System
Air content in concrete (%)
Engineering Construction Standard Full Text Information System
Article 2.1.7 The test method for air content in concrete mixtures shall be carried out in accordance with the provisions of the current national standard "Test Method for Performance of Ordinary Concrete Mixtures". The allowable deviation range between the test results and the required value shall be ±1.5%. (Sub) Water-cement ratio and cement content
Article 2.1.Article 8 The maximum water-cement ratio and minimum cement content of concrete shall comply with the provisions of the current national standard "Concrete Structure Engineering Construction and Acceptance Code". Article 2.1.9 The test method of water-cement ratio and cement content of concrete mixture shall be carried out in accordance with the provisions of the current national standard "Ordinary Concrete Mixture Performance Test Method". The measured water-cement ratio and cement content shall meet the design requirements. (IV) Uniformity
Article 2.1.10 Concrete mixture shall be mixed evenly, with uniform color, and shall not have segregation and bleeding.
Article 2.1.11 The test method of concrete mixture homogeneity shall be carried out in accordance with the provisions of the current national standard "Concrete Mixer Performance Test Method". Article 2.1.12 When checking the uniformity of concrete mixture, samples should be taken from the 1/4 to 3/4 position of the discharge flow during the mixer discharge process for testing, and the test results should meet the following requirements:
1. The relative error of the two measured values of the mortar density in concrete should not be greater than 0.8%,
2. The relative error of the two measured values of the coarse aggregate content in the unit volume of concrete should not be greater than 5%.
Section 2 Concrete Strength
Article 2.2.1 Ordinary concrete is divided into 12 strength grades, namely C7.5, C10, C15, C20, C25, C30, C35, C40, C45, C50, C55, and C60, according to the standard value of cubic compressive strength (N/mm2). Article 2.2.2 The test of concrete strength should be carried out in accordance with the provisions of the current national standard "Test Method for Mechanical Properties of Ordinary Concrete". Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Article 2.2.3 In addition to the qualification assessment of concrete strength in batches according to the "Concrete Strength Inspection and Assessment Standard", the strength of concrete of the same grade and age within a statistical period shall be statistically analyzed, and the mean strength (ufcu), standard deviation (g) and the percentage (P) of strength not less than the required strength grade value shall be statistically calculated to determine the production management level of the enterprise, among which ufcu shall comply with the provisions of Article 2.2.7 of this standard, and g and P shall meet the requirements of Table 2.2.3. Article 2.2.4 For commercial concrete plants and precast concrete component plants, the statistical period can be one month; for construction units that centrally mix concrete on site, the statistical period can be determined according to actual conditions.
Concrete production management level
Production quality level
Concrete
Strength grade
Evaluation index
Concrete strength standard deviation
(N/mm2)
Strength is not less than
Percentage of the specified strength grade value
Commodity concrete
Soil plant and precast
concrete components
Central mixing
Concrete construction site
Commodity concrete
Plants, precast concrete component plants and centrally mixed concrete construction sites Engineering Construction Standards Full Text Information System Engineering Construction Standards Full Text Information System Article 2.2.5 The standard deviation of concrete strength (g) and the percentage of strength not less than the specified strength grade value (P) can be calculated according to the following formula: 1. Standard deviation: 2. Percentage: Where fea × 100% (2.2.5-1) (2.2. 5—2)
The cube compressive strength value of the first group of concrete specimens during the statistical period (N/mm2);
The number of groups of concrete specimens with the same strength grade during the statistical period, which shall not be less than 25 groups;
The average value of the cube compressive strength of N groups of concrete specimens during the statistical period (N/mm2);
The number of groups whose specimen strength is not lower than the required strength grade value during the statistical period.
The coefficient of variation of the concrete strength in the pan (8%) should not be greater than
5% in Article 2.2.6. Its value can be determined by the following formula:
%×100%
(2.2.6-1)
The mean value (μ) and standard deviation (o) of the concrete strength in the pan can be determined by the following formula using the strength data accumulated continuously in normal production: Zfai
Engineering Construction Standard Full-text Information System
(2.2.6 —2)
Engineering Construction Standard Full-text Information System
——Coefficient of variation of concrete strength in the pan: (2.2.6-3)
Standard deviation of concrete strength in the pan (N/mm2);——Average value of the compressive strength of the cube of n groups of concrete specimens (N/mm);
Ateu,s
Difference between the maximum and minimum strengths of the three specimens in the i-th group (N/mm2);
——Number of specimen groups, which shall not be less than 30 groups. fa—Value of the compressive strength of the cube of the i-th group of concrete specimens. Article 2.2.7 The average strength value (utu) calculated on a monthly or quarterly basis should meet the following requirements:
fen,t+1. 4g≤μrn≤f cu,k+2. 50 Wherein μt——average strength value calculated on a monthly or quarterly basis (N/mm2); (2.2.7)
fea,t——standard value of concrete cube compressive strength (N/mm2); - standard deviation of strength calculated on a monthly or quarterly basis (N/mm\), the number of test specimens for determining the standard deviation shall not be less than 25. Note: For concrete with early age strength and special requirements, the average strength value may not be subject to this upper limit. Section 3 Durability of Concrete
Article 2.3.1 According to the number of repeated freeze-thaw cycles (slow freezing method) that concrete specimens can withstand, the frost resistance of concrete is divided into 9 grades: D10, D15, D25, D50, D100, D150, D200, D250 and D300. Article 2.3.2 According to the maximum water pressure that concrete specimens can withstand during the permeability test, the permeability of concrete can be divided into 5 grades: S4, S6, S:, S10, S12.
Article 2.3.3 The test methods for frost resistance and permeability resistance of concrete shall be carried out in accordance with the provisions of the current national standard "Test methods for long-term performance and durability of ordinary concrete" Engineering Construction Standard Full Text Information SystemArticle 4 For commercial concrete plants and precast concrete component plants, the statistical period can be one month; for construction units that centrally mix concrete on site, the statistical period can be determined according to actual conditions.
Concrete production management level
Production quality level
Concrete
Strength grade
Evaluation index
Concrete strength standard deviation
(N/mm2)
Strength is not less than
Percentage of the specified strength grade value
Commodity concrete plants and precast
concrete components
Central mixing
Concrete construction site
Commodity concrete
Plants, precast concrete component plants and centrally mixed concrete construction sites Engineering Construction Standards Full Text Information System Engineering Construction Standards Full Text Information System Article 2.2.5 The standard deviation of concrete strength (g) and the percentage of strength not less than the specified strength grade value (P) can be calculated according to the following formula: 1. Standard deviation: 2. Percentage: Where fea × 100% (2.2.5-1) (2.2. 5—2)
The cube compressive strength value of the first group of concrete specimens during the statistical period (N/mm2);
The number of groups of concrete specimens with the same strength grade during the statistical period, which shall not be less than 25 groups;
The average value of the cube compressive strength of N groups of concrete specimens during the statistical period (N/mm2);
The number of groups whose specimen strength is not lower than the required strength grade value during the statistical period.
The coefficient of variation of the concrete strength in the pan (8%) should not be greater than
5% in Article 2.2.6. Its value can be determined by the following formula:
%×100%
(2.2.6-1)
The mean value (μ) and standard deviation (o) of the concrete strength in the pan can be determined by the following formula using the strength data accumulated continuously in normal production: Zfai
Engineering Construction Standard Full-text Information System
(2.2.6 —2)
Engineering Construction Standard Full-text Information System
——Coefficient of variation of concrete strength in the pan: (2.2.6-3)
Standard deviation of concrete strength in the pan (N/mm2);——Average value of the compressive strength of the cube of n groups of concrete specimens (N/mm);
Ateu,s
Difference between the maximum and minimum strengths of the three specimens in the i-th group (N/mm2);
——Number of specimen groups, which shall not be less than 30 groups. fa—Value of the compressive strength of the cube of the i-th group of concrete specimens. Article 2.2.7 The average strength value (utu) calculated on a monthly or quarterly basis should meet the following requirements:
fen,t+1. 4g≤μrn≤f cu,k+2. 50 Wherein μt——average strength value calculated on a monthly or quarterly basis (N/mm2); (2.2.7)
fea,t——standard value of concrete cube compressive strength (N/mm2); - standard deviation of strength calculated on a monthly or quarterly basis (N/mm\), the number of test specimens for determining the standard deviation shall not be less than 25. Note: For concrete with early age strength and special requirements, the average strength value may not be subject to this upper limit. Section 3 Durability of Concrete
Article 2.3.1 According to the number of repeated freeze-thaw cycles (slow freezing method) that concrete specimens can withstand, the frost resistance of concrete is divided into 9 grades: D10, D15, D25, D50, D100, D150, D200, D250 and D300. Article 2.3.2 According to the maximum water pressure that concrete specimens can withstand during the permeability test, the permeability of concrete can be divided into 5 grades: S4, S6, S:, S10, S12.
Article 2.3.3 The test methods for frost resistance and permeability resistance of concrete shall be carried out in accordance with the provisions of the current national standard "Test methods for long-term performance and durability of ordinary concrete" Engineering Construction Standard Full Text Information SystemArticle 4 For commercial concrete plants and precast concrete component plants, the statistical period can be one month; for construction units that centrally mix concrete on site, the statistical period can be determined according to actual conditions.
Concrete production management level
Production quality level
Concrete
Strength grade
Evaluation index
Concrete strength standard deviation
(N/mm2)bzxz.net
Strength is not less than
Percentage of the specified strength grade value
Commodity concrete plants and precast
concrete components
Central mixing
Concrete construction site
Commodity concrete
Plants, precast concrete component plants and centrally mixed concrete construction sites Engineering Construction Standards Full Text Information System Engineering Construction Standards Full Text Information System Article 2.2.5 The standard deviation of concrete strength (g) and the percentage of strength not less than the specified strength grade value (P) can be calculated according to the following formula: 1. Standard deviation: 2. Percentage: Where fea × 100% (2.2.5-1) (2.2. 5—2)
The cube compressive strength value of the first group of concrete specimens during the statistical period (N/mm2);
The number of groups of concrete specimens with the same strength grade during the statistical period, which shall not be less than 25 groups;
The average value of the cube compressive strength of N groups of concrete specimens during the statistical period (N/mm2);
The number of groups whose specimen strength is not lower than the required strength grade value during the statistical period.
The coefficient of variation of the concrete strength in the pan (8%) should not be greater than
5% in Article 2.2.6. Its value can be determined by the following formula:
%×100%
(2.2.6-1)
The mean value (μ) and standard deviation (o) of the concrete strength in the pan can be determined by the following formula using the strength data accumulated continuously in normal production: Zfai
Engineering Construction Standard Full-text Information System
(2.2.6 —2)
Engineering Construction Standard Full-text Information System
——Coefficient of variation of concrete strength in the pan: (2.2.6-3)
Standard deviation of concrete strength in the pan (N/mm2);——Average value of the compressive strength of the cube of n groups of concrete specimens (N/mm);
Ateu,s
Difference between the maximum and minimum strengths of the three specimens in the i-th group (N/mm2);
——Number of specimen groups, which shall not be less than 30 groups. fa—Value of the compressive strength of the cube of the i-th group of concrete specimens. Article 2.2.7 The average strength value (utu) calculated on a monthly or quarterly basis should meet the following requirements:
fen,t+1. 4g≤μrn≤f cu,k+2. 50 Wherein μt——average strength value calculated on a monthly or quarterly basis (N/mm2); (2.2.7)
fea,t——standard value of concrete cube compressive strength (N/mm2); - standard deviation of strength calculated on a monthly or quarterly basis (N/mm\), the number of test specimens for determining the standard deviation shall not be less than 25. Note: For concrete with early age strength and special requirements, the average strength value may not be subject to this upper limit. Section 3 Durability of Concrete
Article 2.3.1 According to the number of repeated freeze-thaw cycles (slow freezing method) that concrete specimens can withstand, the frost resistance of concrete is divided into 9 grades: D10, D15, D25, D50, D100, D150, D200, D250 and D300. Article 2.3.2 According to the maximum water pressure that concrete specimens can withstand during the permeability test, the permeability of concrete can be divided into 5 grades: S4, S6, S:, S10, S12.
Article 2.3.3 The test methods for frost resistance and permeability resistance of concrete shall be carried out in accordance with the provisions of the current national standard "Test methods for long-term performance and durability of ordinary concrete" Engineering Construction Standard Full Text Information System
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