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高层建筑基础主要的特点就是体积大,一般实体最小尺寸大于或等于1m。它的表面系数比较小,水泥水化热释放比较集中,内部温升比较快。混凝土内外温差较大时,会使混凝土产生温度裂缝,影响结构安全和正常使用。因此,大体积混凝土经常出现的问题不是力学上的结构强度,而是混凝土的裂缝。如何防止大体积混凝土的开裂,一直是工程技术人员长期关心和共同研究的主要课题。在此简要分析了大体积混凝土裂缝的成因及配制应注意的事项。
The main feature of high-rise building foundation is bulky, the general entity minimum size greater than or equal to 1m. Its surface coefficient is relatively small, cement hydration heat release is more concentrated, the internal temperature rise faster. Concrete temperature difference between inside and outside, it will cause concrete temperature cracks, affecting structural safety and normal use. Therefore, the problem that often occurs in mass concrete is not the structural strength of mechanics, but the cracks in concrete. How to prevent the cracking of mass concrete has always been the main topic of long-term concern and joint research by engineers and technicians. Here is a brief analysis of the causes of mass concrete cracks and preparation should pay attention to matters.