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干砂密度的测定方法,通常用烘干砂样根据阿基米德原理采用排水法进行试验。其主要缺点是试验时间较长,耗电量大。不能满足施工急需。快速法打破了传统的采用烘干砂样做排水试验的做法,而是直接采用未经烘干的砂样做排水试验与含水率试验,然后通过计算求得砂子的密度。这种方法的特点是试验速度快,精度高,耗电量少。对急需施工的混凝土配合比能进行及时的试验;对施工中采用排水法测定砂子的含水率时,用以对砂
Dry sand density measurement method, usually using dry sand samples according to Archimedes principle using drainage method for testing. Its main disadvantage is that it takes a long time to test and consumes large amounts of power. Can not meet the urgent needs of construction. The rapid method breaks the traditional practice of using dry sand samples for drainage tests. Instead, it uses the undried sand samples directly as a drainage test and moisture content test, and then calculates the density of the sand. This method is characterized by fast test speed, high precision, and low power consumption. The timely test of the concrete mix proportion in urgent need of construction can be conducted; when the water content of the sand is determined by the drainage method during construction, it is used to