6.
Generally, the cement can be used only after the three-day strength retest report is qualified; 4) Cement retest items mainly include: compressive strength, flexural strength and stability.
In case of infringement, please contact to delete 1.
Steel fittings used for steel structure 1) must be provided with quality certificate, Chinese mark and inspection report, and their performance shall meet the requirements of design documents and contracts.
If necessary, test setting time, etc; 5) If the cement adopts rapid test, the qualified judgment shall be subject to the standard curing 28 day strength; 6) The cement test sheet shall have test conclusions.
3.
Source: the copyright of the construction supervisor belongs to the original author.
The items that must be tested are penetration, softening point and elongation; 5) The performance of new waterproof materials must meet the design requirements, with product identification, production license, factory certificate, quality standards and construction process requirements, and sampling re inspection records.
10.
In case of cement quality problems, the project parts used and the quality requirements that will not affect the parts shall be indicated under the degraded use conditions confirmed in writing by the engineering and technical personnel; 7) The cement type, grade and test number indicated on the concrete trial mix sheet and concrete test block test report shall be consistent with the contents on the cement factory certificate or re inspection report.
During on-site inspection, the correspondence between the three shall be checked, and mixed use is strictly prohibited.
Concrete admixtures 1) must have the quality certificate of the manufacturer, including: factory name, variety, packaging quality, factory date, performance and use instructions.
Precast concrete members 1) precast reinforced concrete members: precast piles, beams, plates, piers, columns and other members used as the main structure.
Anti corrosion, insulation and thermal insulation materials shall be provided with product certificate, performance test report and necessary performance retest report (according to the specification for construction quality acceptance of Roof Engineering).
In addition to providing product qualification certificates, the manufacturer shall provide the following technical data; a) Strength data of component concrete; b) Prestressed concrete reinforcement tensioning record; c) For construction drawings, if there are design changes, there shall be change negotiation documents, and the modified parts shall be indicated in the drawings; d) Quality certificates and test reports of reinforcement and other materials used; e) Component quality assessment data.
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3) when the steel structural members leave the factory, the manufacturer shall submit the following technical documents: a) product quality certificate; b) If there are design changes in the fabrication and processing drawings of steel structures, there shall be change negotiation documents, and the modified parts shall be indicated in the drawings; c) Quality certificates and test reports of steel and other connectors used; d) Test and identification data of new materials and processes; e) Component factory certificate; f) List of shipped components.
Sand and stone (1) shall have factory quality certificate and product performance test report; 2) The sand and stone used in the project shall be sampled and tested according to the origin, variety, specification and batch according to relevant specifications; 3) If the sand and stone test results do not meet the quality standards, they shall not be used in principle.
After taking technical measures for treatment, there shall be a retest report and written approval procedures.
Cement 1) the cement shall have the factory quality certificate and test report of the manufacturer (including factory type, variety, strength grade, production date, factory number and test number; including the manufacturer’s 3-day test report and 28 day reinforcement report); 2) After the cement enters the plant, the supervisor shall check the packaging and mark of cement, and check whether the packaging and mark are consistent with the delivery inspection report of cement; 3) Retest must be conducted before use, and the retest batch shall comply with the provisions of the current construction quality acceptance specifications.
If there are problems in the first material retest, double sampling shall be carried out.
4.
Brick, block and other masonry materials 1) masonry materials entering the site shall be provided with factory quality certificate and product performance test report, and the supervisor shall verify whether the block material identification is clear and effective; 2) The wall materials must be retested before entering the site, and the retest batch shall comply with the provisions of the code for acceptance of masonry construction quality; 3) When there is doubt about the material of masonry materials, samples shall be taken for retest.
5.
Reinforcement 1) reinforcement shall be provided with factory quality certificate and test report, and shall be sampled for mechanical property test according to the provisions of relevant standards; 2) Imported reinforcement shall be provided with mechanical property test, chemical analysis report and weldability test report; 3) For frame structures with seismic fortification requirements, the strength of longitudinal stressed reinforcement shall meet the design requirements; When there are no specific requirements in the design, the measured value of strength obtained from the inspection for class I and II seismic grades shall comply with the following provisions: the ratio of the measured value of tensile strength to the measured value of yield strength of reinforcement shall not be less than 1.25, and the ratio of the measured value of yield strength to the standard value of strength of reinforcement shall not be greater than 1.3.
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Performance test shall be conducted for new materials before use; 2) The qualification shall be determined according to concrete admixtures gb8076, technical code for application of concrete admixtures gb50119 and relevant provisions on environmental protection.
If there are provisions in the acceptance specifications or there are doubts about the quality, mechanical performance test and chemical composition and compatibility inspection shall be carried out according to the specifications; 2) The friction surface of high-strength bolts shall be tested for anti slip coefficient according to the regulations, and the strength test of high-strength bolts shall be carried out according to the specifications.
Prestressed concrete tensioning materials and equipment 1) there shall be factory certificate and hardness test record of prestressed anchorage and fixture; 2) The static load anchoring coefficient and dynamic load anchoring coefficient of prestressed anchor fixture shall be reviewed according to the regulations, and the re inspection shall be carried out according to the provisions of the construction quality specification of concrete structure engineering if necessary; 3) When using metal bellows for hole forming, there shall be quality certificate and on-site inspection record of bellows; 4) There shall be a record of identification of tensioning equipment – oil pump, Jack and pressure gauge by legal measurement and testing unit, and the number of oil pump, Jack and pressure gauge shall be indicated during calibration.
When it is qualified, the two test reports shall be retained at the same time.
Waterproof materials 1) the product license shall be reviewed for the following 8 kinds of waterproof materials: chlorinated polyethylene waterproof coiled material, neoprene waterproof material EPDM sheet, elastomer asphalt waterproof coiled material, plastic asphalt waterproof coiled material, petroleum asphalt paper-based felt, polyurethane waterproof coating, waterborne asphalt based waterproof coating and waterborne polyvinyl chloride tar waterproof coating; 2) There shall be product certificate, performance test report and retest test report (multi-component materials shall have mix proportion description); 3) The linoleum shall be provided with factory quality certificate, including various technical indexes such as variety and grade, and shall be sampled for inspection, including impermeability, tension, flexibility and heat resistance; 4) Asphalt: the place of production, variety, label and report of asphalt shall be provided.
The supervisor shall conduct accounting when reviewing the reinforcement retest report.
4) For the formed reinforcement processed in the factory, the factory certificate and reinforcement factory certificate issued by the processing unit shall be provided, on which the number and test date of reinforcement retest test sheet shall be indicated; 5) The high-strength steel wire and steel strand used for prestressed concrete shall be recorded for visual inspection batch by batch, and the mechanical property test shall be carried out by sampling according to relevant regulations; 6) The items in the reinforcement test sheet shall be filled in completely and there shall be test conclusions.
Welding rod 1) welding rod shall have production certificate; 2) Baking records shall be kept for those requiring baking.
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2) The construction unit shall organize inspection and acceptance according to the factory certificate and the current acceptance standards, and fill in the acceptance records; 3) For general precast concrete components, such as road teeth (side stones), square bricks, railings, ground beams, anti-collision piers, etc., the manufacturer shall provide qualification certificates, including concrete strength and technical data for sampling inspection according to relevant regulations..
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