国产五级黄色片,亚洲国产精品久久久久婷爱影,精品在线91,粉嫩av一区二区国产精品,激情欧美日韩一区二区,午夜免费啪,国产一区二区三区免费

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.