在乡镇砖瓦企业,设备短缺的情况下,对原料土含砂量进行测定,可以采取简易的物理测定(化学测定需要设备和试剂).将原料土以四分法取样,即将原料土划为四部分,任取其中一份;再以四分法取样,如法直至取样100克,放入窑室温度60～80℃烘干,防止温度过高而影响测定效果. In the case of township brick and tile enterprises and equipment shortages, the determination of the sand content of raw materials can be carried out with simple physical measurements (chemical measurements require equipment and reagents). Samples of raw materials are sampled in quarters, ie raw materials are classified as In four parts, one shall be taken; one shall be sampled by quartering method, such as sampling until 100 g, and drying in the kiln chamber at a temperature of 60-80°C to prevent the temperature from being too high and affecting the measurement effect.