The use of admixtures improves the performance of concrete, improves project quality and work efficiency, and at the same time reduces our construction costs. However, you should abide by the relevant regulations and instructions when using it, otherwise it will cause some unnecessary trouble.
AdmixtureUseRegulations
The product quality of admixtures must be qualified and should be tested before use. There are factory quality certificates and test reports. The content of the certificate includes the name of the manufacturer, product name, product characteristics, main ingredients and content, scope of application, suitable dosage, usage methods and instructions, precautions, homogeneity indicators, performance indicators of concrete mixed with admixtures, packaging, quality, Storage conditions, date of manufacture, expiration date, etc. Different admixtures have different corresponding test items, generally including water reduction rate, slump, air content, bleeding rate, setting time, compressive strength, steel bar corrosion, relative durability indicators, etc. The client, client, project name, purpose, sample name, origin and manufacturer, date of sample receipt, and required test items in the test report shall be filled in by the client, and the remaining parts shall be filled in by the test personnel. Fill in the form based on the test calculation results and sign and seal it. For admixtures that require certain technical treatment measures before they can be used, technical requirements should first be considered and must be signed and approved by the relevant technical person in charge before they can be used.
The data clerk should promptly collect, organize and verify the factory quality certificates, test reports, etc. of the admixtures, and check whether their contents and performance indicators are fully filled in , no mistakes or omissions are allowed, the handwriting should be clear, the items should be complete, true and accurate, and there should be no unresolved matters. If the batch of admixture is large and the manufacturer provides a small number of certificates, a copy (such as a photocopy) can be used for reference, but the original certificate number, original storage unit, copy date, and the name of the copying person and copying unit must be noted. Signed and sealed. No unit or individual may forge, alter, destroy or withdraw. For admixtures with product anti-counterfeiting certification marks, after confirming that the product and the factory quality certificate are consistent with the actual product, a copy of the anti-counterfeiting certification mark should be removed, affixed to the product factory quality certificate, and filed together.
Instructions for use of admixtures
Users should carefully check the test report form and For the factory quality certificate, check whether the required test items are complete, whether the test numbers, signatures, and seals are complete, whether the measured values meet the technical requirements of the specification and design, and whether the conclusion is clear. For projects that do not meet the requirements, they should be retested in a timely manner or reported to the relevant engineering technical person in charge for processing. The unqualified test report shall not be withdrawn or destroyed, and the qualified test report or processing report of the retest shall be attached and filed together.
Admixtures should be used within the validity period of the product, and performance tests should be conducted before use. Construction technical data related to its factory quality certificate and test report include construction organization design, technical briefing, negotiation records, construction logs, concrete or masonry mortar mix proportion application form and notification form, specimen pressure test report form, Construction records, pre-inspection records, hidden inspection records, quality assessment, etc. Therefore, the factory quality certificate and test report sheet should not only be consistent with the actual projects and parts used, but also be consistent with the above construction data.
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