在混凝土中加入超塑化剂可以改善混凝土和易性,这已有过许多报道。不仅如此,在混凝土中加入超塑化剂还可以明显地降低混凝土的渗透性。荷兰Fosroc国际有限公司为此做了一些以验证这种效果的试验。该公司曾做了两组试验:一组是用来测定水的渗透率;另一组是用来测定氯化物的侵蚀速度。试验包括基准混凝土与仅掺有超塑化剂的混凝土之间的对比,二者均具有相同的和易性。1.水渗透试验试验是根据联邦德国工业标准DIN1048进行的。该标准规定,混凝土试样的一个侧面在下述压 Adding superplasticizers to concrete can improve the workability of concrete, which has been reported many times. Not only that, superplasticizers in concrete can also significantly reduce the permeability of concrete. Fosroc International Co., Ltd. of the Netherlands has done some experiments to verify this effect. The company had done two sets of tests: one was to measure the water permeability, and the other was to determine the rate of chloride attack. The test included comparisons between benchmark concrete and concrete blended with superplasticizer only, both having the same workability. 1. Water penetration test The test was conducted in accordance with the Federal German Industrial Standard DIN 1048. The standard states that one side of a concrete specimen is