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混凝土的凝结时间异常一般表现为缓凝、速凝和假凝三种,速凝和假凝会导致混凝土浇筑困难,缓凝会导致混凝土拆模时间延长、早期强度低,严重时28d强度达不到设计要求,酿成质量事故。本期特别策划将邀请相关专家对混凝土凝结时间异常问题进行探讨。
The abnormal setting time of concrete generally shows three types of retarding, quick setting and false setting. Fast setting and false setting will lead to difficulty of concrete pouring. Retarded setting will result in prolongation of removing time of concrete, low early strength and severeness at 28d To the design requirements, lead to quality accidents. This special planning will invite the relevant experts to discuss the abnormal coagulation time of concrete.