本文介绍一种简便易行的节约材料方法——混凝土二次投料法。只要对混凝土的搅拌方式和搅拌次序稍加改动,就会收到节约水泥、降低成本或增加混凝土强度的特殊功效。 从混凝土强度直线型经验公式R28=AR_c(C/W—B)中不难看出,混凝土的强度关键在于水泥通过水化作用而粘结砂石。因此,混凝土的强度主要来源于水泥浆体的强度,而 This article describes a simple and easy material saving method - concrete secondary feeding method. As long as the concrete mixing method and the mixing sequence are slightly modified, special effects such as saving cement, reducing costs, or increasing the strength of the concrete will be received. From the empirical formula of concrete strength R28=AR_c(C/W—B), it is not difficult to see that the key to the strength of concrete is cement bonding sand by hydration. Therefore, the strength of concrete is mainly derived from the strength of cement paste, and