减水剂能否不经溶解,直接以干粉掺入使用的问题,国内已有一些单位进行了试验和应用。但是,目前绝大多数的减水剂仍要求配成溶液使用,这给混凝土的搅拌工序增加了工作量,甚至不得不增加搅拌站的工作人员。为此,我们用水泥砂浆进行了减水剂干粉掺入试验。现将试验情况介绍如下。一、原材料及试验方法 1.原材料及砂浆配合比采用江苏吴县水泥厂500号普通硅酸盐水泥;青岛砂(细度模数M_K=2.48,平 Whether the water-reducing agent can be directly dissolved with dry powder without being dissolved, some domestic units have conducted tests and applications. However, the vast majority of water-reducing agents still require the use of solutions. This increases the workload of the concrete mixing process, and even has to increase the staff of the mixing station. To this end, we used a cement mortar for dry powder incorporation test. Now introduce the test situation as follows. First, raw materials and test methods 1. Raw materials and mortar mix ratio used in Jiangsu Wuxian cement factory 500 ordinary Portland cement; Qingdao sand (fineness modulus M_K = 2.48, flat