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将微沫剂按一定的比例掺入砂浆,能产生无数微小均匀、各自分散、互不串通的小气泡。这些小气泡附于水泥和砂子表面,在砂浆中起润滑作用,使搅拌时省力,并能使砂浆产生稳定的胶结性能。因此,微沫剂可作为一种高效能分散剂。现将对微沫砂浆所做的试验情况介绍如下。一、原材料及试验方法微沫剂为褐棕色透明状胶体,PH值7.5～8.5,含水量不大于22％,游离松香含量不超过10％,用70℃以上的热水稀释后成乳白色溶液。使用北京长城牌325号矿渣,大同425号普通硅酸盐和大同425
The incorporation of the micro-foam into the mortar in a certain proportion can produce numerous small and uniform bubbles, which are dispersed and do not colluded with each other. These small air bubbles are attached to the surface of cement and sand and act as a lubricant in the mortar to make the labor-saving during agitation and to give the mortar a stable cementation performance. Therefore, the microfoam can be used as a high-performance dispersant. The test of micro-foam mortar will now be described as follows. First, raw materials and test methods The micro-foam agent is a brownish-brown transparent colloid with a pH of 7.5-8.5, a moisture content of not more than 22%, a free rosin content of not more than 10%, and a milky white solution after being diluted with hot water of 70°C or higher. Use Beijing Great Wall Brand No. 325 slag, Datong No. 425 Ordinary Silicate and Datong 425