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一、对原材料的质量控制混凝土是由水泥、砂、石、水组成,有的还有掺合料和外加剂。应对组成混凝土的原材料进行控制,使之符合相应的质量标准。1.水泥质量控制水泥强度的波动,将直接影响混凝土的强度。不同品种的水泥要分别存储或堆放,不得混合使用。购进的水泥除应持有生产厂家的合格证外,还应做常规检验合格后方可正常使用。在钢筋混凝土结构中,严禁使用含氯化物的水泥。2.砂料的质量控制各级石子超径颗粒含量的变化,会导致混凝
First, the quality control of raw materials Concrete is composed of cement, sand, stone, water, and some admixtures and admixtures. The raw materials that make up the concrete should be controlled to meet the appropriate quality standards. 1. Cement quality control Fluctuations in the strength of concrete will directly affect the strength of concrete. Different types of cement to be stored or stacked, may not be mixed. In addition to purchasing cement should hold the manufacturer’s certificate, but also should be done after the normal inspection before normal use. In reinforced concrete structures, the use of chloride cement is strictly prohibited. 2. Sand quality control At any level of stone ultra-particle changes in particle size, will lead to coagulation