论文部分内容阅读
最近,日本水泥公司和三洋化成工业公司开发研制出了一种可以防止混凝土构筑物发生干裂的混凝土用高效能抗收缩剂,并已从1984年8月1日开始出售产品。这种混凝土用高效能抗收缩剂,其产品型号有S_3和AS_(20)两种,其抗收缩原理与迄今使用的膨胀性混和材有本质上的不同。目前使用的无机质膨胀性混和材,是靠用膨胀的压缩力抵消张拉力的方法来防止干燥收缩的;而这种高效能抗收缩剂,主要是用减弱水的表面张力的方法来减少干燥收缩现象。这种高效能抗收缩剂,使用范围较广泛,在一般的建筑构筑物、土木
Recently, Japanese cement company and Sanyo Chemical Industry Co., Ltd. have developed a high-performance anti-shrinkage agent for concrete that can prevent dry cracking of concrete structures, and have started to sell products since August 1, 1984. This type of high-performance anti-shrinkage agent for concrete has two types, S_3 and AS_(20), and its anti-shrinkage principle is fundamentally different from the expansive mixed material used so far. The currently used inorganic expanded composites are based on the use of expanding compressive force to counteract the tensile force to prevent drying shrinkage; this high-performance anti-shrinkage agent is mainly used to reduce the surface tension of water to reduce drying Shrinkage phenomenon. This high-performance anti-shrinkage agent has a wide range of applications in general building structures and civil engineering.