亚洲综合在线五月天,毛片在线免费,欧美性喷水,亚洲精品一区二区三区在线看,97精品超碰一区二区三区,成人激情视频在线观看,国产99久久久国产精品下药

PCA ? -IV is a new generation superplasticizer with a base of modified Polycarboxylic ether. It offers maximal water reduction, increased early strength, and enhanced finishing characteristics. PCA ? -IV contains no formaldehyde, calcium chloride or other purposely added chlorides and will not initiate or encourage the corrosion of the steel present in the concrete. It is formulated to comply with the subsequent specifications for concrete admixture: ASTM494, Type F; BS EN934:2/3.2.3.