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利用大体积混凝土水化热提高早、中期强度的机制,大幅度降低单位水泥用量,辅之以冷却水和投放大石、采用缓凝型减水剂延缓放热峰等综合技术措施,证明可有效控制超大体积结构混凝土的温度应力和裂缝,综观研究成果,文献资料,结合施工实践,提出温度梯度GradT≤10℃/m是安全、可靠、适宜的。反之,不分结构大小、形状、施工养护环境,一律规定25℃温差控制是值得探讨的。
The use of large-scale concrete hydration heat to improve the early and mid-term strength mechanisms, a substantial reduction in the amount of cement per unit, supplemented by cooling water and the application of large stones, the use of retarding type water reducing agent to delay the exothermic peak and other comprehensive technical measures proved to be effective To control the temperature stress and cracks of super-bulky structure concrete, a comprehensive review of the research results, literature, combined with construction practice, it is proposed that the temperature gradient GradT≤10°C/m is safe, reliable, and appropriate. On the contrary, regardless of the size, shape, construction and maintenance environment, it is stipulated that the temperature control at 25°C is worth exploring.