近年来,M减水剂和微沫剂在混凝土和砂浆中获得广泛的应用。但它们在各组份材料中所占相对比例甚小,就有效掺量控制区间来讲,常用的木质素磺酸钙在混凝土中用量仅为水泥用量的0.2%～0.3%,微沫剂在砂浆中仅为0.005%～0.01%,即每顿水泥用量中只需掺入50～100克。混凝土或砂浆搅拌中,如以每盘通常采用50千克水泥计算,只需微沫剂2.5～5克。同时,掺 In recent years, M water-reducing agent and micro-foam agent have been widely used in concrete and mortar. However, their relative proportions in the constituent materials are very small. In terms of the effective dosage control range, the commonly used amount of calcium lignosulfonate in concrete is only 0.2% to 0.3% of the cement content, and the microfoam is Only 0.005% to 0.01% of the mortar is used, ie, only 50 to 100 grams of each cement must be blended. In concrete or mortar mixing, if only 50 kg of cement is usually used for each tray, only 2.5 to 5 grams of microfoam is required. At the same time, mixed