试验室提供的混凝土配合比为理论配合比。在实际施工中,应视现场骨料的含水状况来调整混凝土的施工配合比。砂子含水率现场快速测定可采用炒干法。具体步骤如下。1.向干净的砂盘中加入约500 g 砂子,称取砂盘和试样总重 m_2。2.把砂子烘干、冷却后,称取砂子和砂盘总重 m_3。3.称取砂盘重为 m_1。 Laboratory mix of concrete provided for the theoretical mix. In the actual construction, should be depending on the water content of the site aggregate to adjust the construction mix of concrete. Rapid determination of moisture content of the sand can be used frying dry method. Specific steps are as follows. 1. Add about 500 g of sand to a clean sand plate, weigh the sand plate and the total weight of the sample m_2.2. After the sand is dried and cooled, weigh the sand and the sand plate a total of m_3.3, Disk weight is m_1.