公开(公告)号：US4308069A

公开(公告)日：1981-12-29

申请号：US181612

申请日：1980-08-26

Applicant: Akitoshi Tsuji ,  Yoshihiro Fukushima

Inventor： Akitoshi Tsuji ,  Yoshihiro Fukushima

IPC: C04B24/22 ,  C04B7/35

CPC classification number: C04B24/22

Abstract: Slump loss in fresh concrete is prevented by adding a powdery or granular barium, magnesium, iron or aluminum salt of a .beta.-naphthalenesulfonic acid-formaldehyde condensate to the cement or concrete composition. About 0.01 to 10 parts by weight of the condensate per 100 parts by weight of cement, preferably Portland cement, are employed.

Abstract translation: 通过向水泥或混凝土组合物中加入β-萘磺酸 - 甲醛缩合物的粉末或颗粒状钡，镁，铁或铝盐来防止新鲜混凝土中的坍落度损失。 每100重量份水泥，优选波特兰水泥，使用约0.01至10重量份的冷凝水。