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Engineering Construction Standard Full Text Information System
People's Republic of China Construction Industry Standard JG
301994
Mould for concrete specimens
1994-12-09 Issued
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full Text Information System
1995-07-01 Implementation
. Engineering Construction Standard Full Text Information System
People's Republic of China Construction Industry Standard Concrete Test Mould
Mould for concrete specimens Subject Content and Scope of Application
JG3019-94
The standard specifies the classification, basic specifications, technical requirements, test methods, inspection rules and markings, packaging, transportation, storage, etc. of test moulds for making concrete cubes and prism specimens. This standard applies to the design, production and quality inspection of concrete test moulds. 2 Reference standards
Gray iron castings
Carbon structural steel
3 Product classification and basic specifications
3.1 Classification
3.3.1 Test mold classification
a, cube test mold
Prismatic test mold
cl Sealed test mold, see Appendix A (supplement) 3.1.2
Cube test molds can be single or triple. The single and triple cube test mold schemes are shown in Figure 1. The prismatic test mold scheme is shown in Figure 2.
Approved by the Ministry of Construction of the People's Republic of China on December 9, 1994, Engineering Construction Standard Full Text Information System
Implementation on July 1, 1995
Engineering Construction Standard Full Text Information System
3.2 Basic specifications and codes
3.2.1 The specifications and dimensions of the test mold shall comply with the provisions of Table 1 and Figures 1 and 2. Table 1 Specifications and codes of test molds
Test mold code
MHA—100
MHA3—100
MHA—150
MHA-200
MHL—100X300
MHL—100X400
MHL—100X515
MHL150×300
MHL—150X600
Inside of test mold Dimensions (mm)
100×100×100
100X100X100
150X150X150
200X200×200
100×100
100×100
100×100
150×150
150×150
Note: MHL-100×515 is the code for the shrinkage test mold. The shrinkage test mold should have an end plate that can fix the probe or reserve a groove. 3.2.2 Model compilation
The concrete test model number consists of the test mold name code, construction requirements and specifications. The model description is as follows: MHAL
Sealed (code K)
Connection form (single connection omitted)
Cube (prism)
Concrete
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3.2.3 Marking example
a. Cube single concrete test mold, specification is 100mmX100mmX100mm. Cube single concrete test mold MHA-100JG301994b. Cube triple concrete test mold, specification is 100mm×100mmX×100mm. Cube triple concrete test mold MHA3-100JG3019-94c. Prismatic concrete test mold, specification is 100mm×100mmX300mmPrismatic concrete test mold MHL-100×300IG301994d. Concrete sealing test mold, specification is 150mm×150mm×150mmConcrete sealing test mold MHAK-150
4 Technical requirements
4.1 Basic requirements
4.1.1 The test mold shall comply with the requirements of this standard and shall be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.1.2 The test mold shall not be deformed during assembly and molding of the test piece. 4.1.3 The test mold structure shall ensure that the side panels of the test mold can be correctly positioned during assembly. The entire test mold must be tightly connected and reliably fastened. It shall not be loose or leak during vibration molding. 4.1.4
The test mold structure should be easy to fix to the vibration table, and should be firm and reliable after fixation. 4.1.5 The side plates, end plates and bottom plates of the test mold should have sufficient positioning surfaces, and the disassembled parts should be interchangeable. When the test mold is finalized for production, it should be tested and confirmed to meet the requirements of this standard and have sufficient durability before production. 4.2 Material requirements
4.2.1 The test mold should be made of cast iron not less than HT200, or Q235 steel or other grades of steel with performance indicators not less than Q235 steel or other non-absorbent materials. When cast iron is used, it should meet the requirements of GB9439. When steel is used, it should meet the requirements of GB700. When other non-absorbent materials are selected, they should be specially tested and meet the requirements of this standard. They can only be used if they have sufficient durability.
4.2.2 When cast iron is used to make the test mold, the test mold casting should be aged. 4.3 Manufacturing requirements
4. β1 The inner surface of the test mold (working surface) should be smooth and flat, without sand holes, cracks and scratches. 4.B.2 The precision Ra of the inner surface of the test mold shall not be greater than 3.2um. 4.β.3 After the test mold is assembled, the internal dimension error shall not be greater than ±0.2% of the nominal dimension, and shall not be greater than ±1m. 4.β.4 After the test mold is assembled, the angles between its adjacent side surfaces and each side surface and the upper surface of the bottom plate shall be right angles, and the right angle error shall not be greater than ±0.3°
4.3.5 The flatness error of the inner surface of the side plate, end plate, partition plate and the upper surface of the bottom plate of the test mold shall not be greater than 004mm per 100mm. The flatness error of the positioning surface shall not be greater than 0.06mm. 4.3.6 After the test mold is assembled, the gap of its connecting surface shall not be greater than 0.2mm. The gap between the partition plate and the side plate shall not be greater than 0.4mm.
Engineering Construction Standard Full Text Information System
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4.4 Appearance Requirements
4.4.1 All external surfaces of the test mold should be smooth, free of burrs, sand, scars and other defects. 4.4.2 The external surface of the test mold and fasteners should be painted with anti-rust paint, and the paint surface should be smooth, uniform and consistent in color. 4.4.3 After the test mold is assembled, the inner surface should be treated with anti-rust. 5 Inspection Methods
5.1 Durability Test
5.1.1 For the durability test, a rapid test method should be used to simulate 50 use tests. 5.1.2 During the test, the test mold should be assembled first, and its internal dimensions, verticality and connection surface gap should be tested. Then, it should be placed on a vibration table and vibrated for 60 seconds, the test mold should be disassembled and reassembled, and this cycle should be repeated 49 times. At the 50th time, the internal dimensions, verticality and joint surface gap of the test mold should be checked before and after vibration. 5.1.3 After 50 times of disassembly and assembly vibration test, the internal dimensions, verticality and joint surface gap of the test mold should meet the requirements of this standard.
5.2 Leakage test
Put ordinary concrete mixture (without admixture) with a drop of 100-120mm in the test mold, vibrate on the vibration table for 30s, and then observe whether there is leakage of slurry.
Surface roughness inspection
The surface roughness of the test mold should be inspected by a surface roughness meter or a Shiyi sample. 5.4 Dimension measurement
The internal dimensions of the test mold should be measured with a vernier caliper and a depth gauge with a score of 0.05. The distance between the inner surfaces of the two opposite side plates of the test mold should be measured symmetrically with a vernier caliper. Its height should be measured symmetrically with a depth gauge at three points on each side. For prismatic test molds, 2 to 4 height measuring points should be added in the length direction. 5.5
Verticality measurement
Verticality should be measured with a knife-edge square and a plug gauge with a precision of 0. The verticality of each adjacent surface of the test mold side panel should be measured at 1/2 of its height. The verticality of the upper surface of the side panel and the bottom plate should be measured at 1/2 of the length direction of the side panel.
5.6 Flatness measurement
Flatness should be measured with a knife-edge square and a plug gauge with a precision of 0. The flatness of the inner surface and positioning surface of the test mold should be measured with a flat ruler and a cold gauge. The length of the knife-edge square should be greater than the diagonal length of the inner surface of the cubic test mold. Measure according to the closed M-shaped layout.
Gap measurement
After the test mold is assembled, the gap of each connecting surface should be measured with a plug gauge. 5.8 Appearance inspection
Appearance inspection should be carried out visually in a bright place.
6 Inspection rules
6.1 Inspection classification and inspection items
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6.1.1 Trial molds are divided into factory inspection (or delivery inspection) and type inspection. 6.1.2 Inspection items shall be carried out in accordance with the requirements of Table 2. 6.2 Factory inspection
Table 2 Test mold inspection items
Durability inspection
Leakage inspection
Surface roughness
Dimension error
Vertical error
Flatness error
Packaging, marking
Name of inspection item
Clause of this standard
7.1.27.2.3
The test mold production process shall be inspected item by item according to the contents of 4, 5, 6, 7, and 8 in Table 2, and can only be put into storage after passing the inspection. The test mold must be inspected and passed by the inspection department of the manufacturer before it can be shipped out of the factory, and it must be accompanied by a quality inspection certificate. The test mold factory inspection shall be sampled and inspected by batch according to the contents of 4.5.6.78.9 in Table 2. Batch division, according to the same specifications and materials, every 100 test molds are considered as a batch, and less than 100 are also considered as a batch. Three test molds are randomly selected from each batch for factory inspection.
6.3 Type inspection
6.3.1 A test mold shall be subjected to type inspection when any of the following conditions occur: a. Trial type identification of new products or old products transferred to the factory for production; c. Changes in product structure, manufacturing process or materials, etc., which have an impact on product performance; c. When production is stopped for more than half a year and resumed;
d. When there is a large difference between the factory inspection and the last type inspection; e. During batch production, it shall be conducted at least once every two years; f. When the national quality supervision agency proposes type inspection requirements. 6.3.2 The test mold type inspection includes all technical requirements and all items in Table 2. 6.3.3 For type inspection, samples shall be randomly selected from the qualified products of the manufacturer. Six samples shall be selected for each material and each specification of the test mold.
6.4 Judgment rules
During type inspection, if one of the samples does not meet the test mold requirement, double sampling and re-inspection of the unqualified items are allowed. If one of the test molds still fails after inspection, the type inspection will not be passed. 6.4.2 For factory inspection, each test mold leaving the factory shall be inspected according to the inspection items specified in Table 2. Only those that meet all the requirements can leave the factory.
3 Products that meet the requirements of this standard for all inspection items are considered qualified products. 6.4.3
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7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1 Each product should have a manufacturer's label and be fixed in a conspicuous position. 7.1.2 The label should include the following contents:
a. Product name and code;
b. Factory number:
c. Manufacturing date;
d. Manufacturer name.
7.1.3 The packaging box of the product should indicate: a. Product name and code;
b. Manufacturer name;
c. Manufacturing date;
d. Quantity and weight;
e Receiving unit, address, zip code;
f. The packaging box should have moisture-proof and anti-collision signs. 7.2
7.2.1 When packing the trial mold, it should be packaged in a plastic film bag. 7.2.2 The packaging box should be firm and reliable, such as a wooden box. 7.2.3 The packaging box should contain relevant documents such as packing list, product certificate and instruction manual. 7.3 Transportation and storage
During transportation, the product should be protected from collision, throwing, rain and snow. The product should be stored in a ventilated and dry warehouse. Engineering Construction Standard Full-text Information System
. Engineering Construction Standard Full-text Information System
Appendix A
Concrete Sealed Test Mould
(Supplement)
Concrete Sealed Test Mould is suitable for making cubic specimens for early estimated concrete strength test. A1
Specifications and Codes
A1.1 All concrete sealed test moulds are cubic test moulds, which can be single-joint or triple-joint. The schemes of single-joint and triple-joint test moulds are shown in Figure Al.
Figure A1 Schematic diagram of single-joint and triple-joint test mould schemes 1-cover plate; 2-sealing pad; 3-mould body; 4-pull rod A1.2 The specifications and dimensions of the concrete sealed test mould shall be consistent with those shown in Figure A1 and Table A1. Table AI Specifications and codes of test molds
Test mold code
MHAK—100
MHA3K—100
MHAK—150
Engineering Construction Standard Full-text Information System
Inner dimensions (mm)
100×100×100
Triple 100×100×100
150×150×150
Engineering Construction Standard Full-text Information System
A2 Technical requirements
A2.1 The concrete sealing test mold consists of four parts: mold body, cover plate, sealing pad and tie rod. The technical requirements of the mold body shall comply with the relevant provisions of Chapter 4 of this standard.
A2.2 The cover plate shall be made of steel plate or cast iron and shall comply with the provisions of GB700 or GB9439. The cover plate should have sufficient rigidity, and the roughness Ra of the inner surface shall not be greater than 6.3um.
A2.3 The sealing gasket between the cover plate and the mold body is an oil-resistant rubber plate with a use temperature of 100℃. Its performance shall comply with the provisions of GB5574, with a thickness of 5-6mm, and the length and width shall not be less than the size of the cover plate. A24 The connecting rod between the cover plate and the mold body is made of 8-10mm steel, and the length shall be 20mm higher than the cover plate. Additional Notes
This standard was proposed by the Standard and Quota Research Institute of the Ministry of Construction. This standard is under the jurisdiction of the China Academy of Building Research, the unit responsible for the standard technology of construction engineering. This standard was drafted by: China Academy of Building Research, Railway Construction Research and Design Institute, Beijing Power Machinery Parts Factory, Shenyang Jianhua Instrument Factory, Shenyang Testing Instrument Factory No. 2, Jiangsu Academy of Building Research. The main drafters of this standard are: Hui Manyin, Wang Zhihua, Zhou Shuyi, Zhang Baochi, Pan Yonghai, Huang Xiaoping, Wang Chaoyang, and Wang Jingzhou. This standard is entrusted to the Building Materials Research Institute of China Academy of Building Research to interpret. Engineering Construction Standards Full Text Information System
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Engineering Construction Standard Full Text Information System
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7 Marking, Packaging, Transportation, Storage
7.1 Marking
7.1.1 Each product should have a manufacturer's label and be fixed in a conspicuous position. 7.1.2 The label should include the following contents:
a. Product name and code;
b. Factory number:
c. Manufacturing date;
d. Manufacturer's name.
7.1.3 The packaging box of the product should indicate: a. Product name and code,
b. Manufacturer name;
c. Factory date;
d. Quantity and weight;
e Receiving unit, address, zip code;
f. The packaging box should have moisture-proof and anti-collision signs. 7.2
7.2.1 When packing the trial mold, it should be packaged in a plastic film bag. 7.2.2 The packaging box should be firm and reliable, such as wooden boxes. 7.2.3 The packaging box should contain relevant documents such as packing list, product certificate and instruction manual. 7.3 Transportation and storage
During transportation, the product should avoid collision, throwing, rain and snow. The product should be stored in a ventilated and dry warehouse. Engineering 6 Construction Standard Full Text Information System
. Engineering Construction Standard Full Text Information System
Appendix A
Concrete Sealed Test Mould
(Supplement)
Concrete Sealed Test Mould is suitable for making cubic specimens for early estimated concrete strength test. A1
Specifications and Codes
A1.1 Concrete Sealed Test Moulds are all cubic test moulds, which can be single-joint or triple-joint. The schemes of single-joint and triple-joint test moulds are shown in Figure A1.
Figure A1 Schematic diagram of single-joint and triple-joint test mould schemes 1-cover plate; 2-sealing pad; 3-mould body; 4-pull rod A1.2 The specifications and dimensions of the concrete sealed test mould shall be consistent with those shown in Figure A1 and Table A1. Table AI Specifications and codes of test molds
Test mold code
MHAK—100
MHA3K—100
MHAK—150
Engineering Construction Standard Full-text Information System
Inner dimensions (mm)
100×100×100
Triple 100×100×100
150×150×150
Engineering Construction Standard Full-text Information System
A2 Technical requirements
A2.1 The concrete sealing test mold consists of four parts: mold body, cover plate, sealing pad and tie rod. The technical requirements of the mold body shall comply with the relevant provisions of Chapter 4 of this standard.
A2.2 The cover plate shall be made of steel plate or cast iron and shall comply with the provisions of GB700 or GB9439. The cover plate should have sufficient rigidity, and the roughness Ra of the inner surface shall not be greater than 6.3um. www.bzxz.net
A2.3 The sealing gasket between the cover plate and the mold body is an oil-resistant rubber plate with a use temperature of 100℃. Its performance shall comply with the provisions of GB5574, with a thickness of 5-6mm, and the length and width shall not be less than the size of the cover plate. A24 The connecting rod between the cover plate and the mold body is made of 8-10mm steel, and the length shall be 20mm higher than the cover plate. Additional Notes
This standard was proposed by the Standard and Quota Research Institute of the Ministry of Construction. This standard is under the jurisdiction of the China Academy of Building Research, the unit responsible for the standard technology of construction engineering. This standard was drafted by: China Academy of Building Research, Railway Construction Research and Design Institute, Beijing Power Machinery Parts Factory, Shenyang Jianhua Instrument Factory, Shenyang Testing Instrument Factory No. 2, Jiangsu Academy of Building Research. The main drafters of this standard are: Hui Manyin, Wang Zhihua, Zhou Shuyi, Zhang Baochi, Pan Yonghai, Huang Xiaoping, Wang Chaoyang, and Wang Jingzhou. This standard is entrusted to the Building Materials Research Institute of China Academy of Building Research to interpret. Engineering Construction Standards Full Text Information System
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Engineering Construction Standard Full Text Information System
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7 Marking, Packaging, Transportation, Storage
7.1 Marking
7.1.1 Each product should have a manufacturer's label and be fixed in a conspicuous position. 7.1.2 The label should include the following contents:
a. Product name and code;
b. Factory number:
c. Manufacturing date;
d. Manufacturer's name.
7.1.3 The packaging box of the product should indicate: a. Product name and code,
b. Manufacturer name;
c. Factory date;
d. Quantity and weight;
e Receiving unit, address, zip code;
f. The packaging box should have moisture-proof and anti-collision signs. 7.2
7.2.1 When packing the trial mold, it should be packaged in a plastic film bag. 7.2.2 The packaging box should be firm and reliable, such as wooden boxes. 7.2.3 The packaging box should contain relevant documents such as packing list, product certificate and instruction manual. 7.3 Transportation and storage
During transportation, the product should avoid collision, throwing, rain and snow. The product should be stored in a ventilated and dry warehouse. Engineering 6 Construction Standard Full Text Information System
. Engineering Construction Standard Full Text Information System
Appendix A
Concrete Sealed Test Mould
(Supplement)
Concrete Sealed Test Mould is suitable for making cubic specimens for early estimated concrete strength test. A1
Specifications and Codes
A1.1 Concrete Sealed Test Moulds are all cubic test moulds, which can be single-joint or triple-joint. The schemes of single-joint and triple-joint test moulds are shown in Figure A1.
Figure A1 Schematic diagram of single-joint and triple-joint test mould schemes 1-cover plate; 2-sealing pad; 3-mould body; 4-pull rod A1.2 The specifications and dimensions of the concrete sealed test mould shall be consistent with those shown in Figure A1 and Table A1. Table AI Specifications and codes of test molds
Test mold code
MHAK—100
MHA3K—100
MHAK—150
Engineering Construction Standard Full-text Information System
Inner dimensions (mm)
100×100×100
Triple 100×100×100
150×150×150
Engineering Construction Standard Full-text Information System
A2 Technical requirements
A2.1 The concrete sealing test mold consists of four parts: mold body, cover plate, sealing pad and tie rod. The technical requirements of the mold body shall comply with the relevant provisions of Chapter 4 of this standard.
A2.2 The cover plate shall be made of steel plate or cast iron and shall comply with the provisions of GB700 or GB9439. The cover plate should have sufficient rigidity, and the roughness Ra of the inner surface shall not be greater than 6.3um.
A2.3 The sealing gasket between the cover plate and the mold body is an oil-resistant rubber plate with a use temperature of 100℃. Its performance shall comply with the provisions of GB5574, with a thickness of 5-6mm, and the length and width shall not be less than the size of the cover plate. A24 The connecting rod between the cover plate and the mold body is made of 8-10mm steel, and the length shall be 20mm higher than the cover plate. Additional Notes
This standard was proposed by the Standard and Quota Research Institute of the Ministry of Construction. This standard is under the jurisdiction of the China Academy of Building Research, the unit responsible for the standard technology of construction engineering. This standard was drafted by: China Academy of Building Research, Railway Construction Research and Design Institute, Beijing Power Machinery Parts Factory, Shenyang Jianhua Instrument Factory, Shenyang Testing Instrument Factory No. 2, Jiangsu Academy of Building Research. The main drafters of this standard are: Hui Manyin, Wang Zhihua, Zhou Shuyi, Zhang Baochi, Pan Yonghai, Huang Xiaoping, Wang Chaoyang, and Wang Jingzhou. This standard is entrusted to the Building Materials Research Institute of China Academy of Building Research to interpret. Engineering Construction Standards Full Text Information System
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