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木钙减水剂在混凝土中的常用掺量为水泥重量的0.2～0.3%,若掺量超过其上限即为超量掺用木钙。超量掺用一般在混凝土工程中是不允许的,尤其是冬季混凝土工程。徐州市建工局某处于1982年12月下旬施工的徐州热电公司北区热电厂(以下简称北热)主厂房二号锅炉基础由于施工管理人员不甚了解木钙性能,而把木钙作为混凝土早强剂超量掺用,其超掺量约为
The amount of wood calcined water-reducing agent used in concrete is 0.2-0.3% of the weight of the cement. If the amount exceeds the upper limit, it is used in excess of wood calcium. Overdosing is generally not allowed in concrete projects, especially in winter concrete projects. Xuzhou Construction and Industry Bureau, a construction company in North District of Xuzhou Thermal Power Plant (hereinafter referred to as Beire), which was under construction in late December 1982, was on the 2nd boiler base because construction management personnel did not understand the properties of wood calcium, and wood calcium was used as concrete. The strong agent is overdosed and its super dosage is about