亚洲欧洲精品视频一区二区三区,日本精品有色视频大全,手机看片日韩国产福利视频,91在线中文字幕,特爽毛片一区二区三区,日韩无码不卡,久久久精品久久久69,国产国语精品一区二区在线观看

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.