For commercial concrete source: Check the supply batching capabilities; Check in batching materials provided; Sampling of materials including sand, stone, cement, additives, ... portable laboratory. After the test results obtained at the mixing plant materials unsatisfactory, taking material supply station sending unit functioning concrete mix design. When concrete batching plants supply, supervision and inspection work irregular concrete production at the station, concrete sampling test at the scene to R3, R7, R28 (depending on the requirements of progress and construction methods public).
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