Construction materials, equipment required testing approach
1) the principle of individual supplies department responsible for the scene play material quality, can use after the reinspection, to field laboratory supplies department to handle trust test. Duty engineer shall be in accordance with the provisions in the process of process to do entrust sampling field laboratory, including concrete, mortar, reinforcement, fittings, backfill soil, etc. The site quality inspection of the sectional division shall be the responsibility of the quality department of homeland security
2) raw materials to use must first test, in order to prevent the nonconforming used in engineering, quality accident. Entrusted by the engineering department to handle the raw material test, field laboratory to guide how to sampling, the principle of group group, after accepting authorization, the lab should be sent to the laboratory test and retrieve the test report.
3) procedure must be on the project after test qualified to enter the next process, mainly include: steel connections: before the formal use, must do procedure qualification test pieces in formal use, should take the batch sampling test, qualified only after pouring concrete. Backfill soil test: before the formal backfill, should first will be ready to backfill materials, central laboratory do standard compaction test, control of dry density index are obtained. Formal backfill, stratified sampling, testing dry density and moisture content. After qualified, are allowed to backfill on the first floor.
4) representative samples of various materials in accordance with the provisions, the sampling method of sampling, to ensure that the representation of the test, especially for concrete samples, the raise block on the truck to the site before entering the pump after sampling, with conditions in the die block before sampling.
The above content are according to the students the problems in the practical work of finishing, for your reference, if there is any question, please timely communication, to point out mistakes.
