大体积混凝土配合比优化设计在大型动载设备基础中的应用研究  

Optimization Design of Mass Concrete Mix Ratio Application of Mass Concrete Mix Ratio Optimization Design in the Foundation of Large-scale Dynamic Load Equipment

作　　者：李灿 周殷弘 余建国 熊俊驰 王典 LI Can;ZHOU Yinhong;YU Jianguo;XIONG Junchi;WANG Dian(China Aerodynamics Research and Development Center,Mianyang 621000,China;China Construction Eighth Engineering Bureau Co.,Ltd.,Shanghai 200120,China;School of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150009,China)

机构地区：[1]中国空气动力研究与发展中心,四川绵阳621000 [2]中国建筑第八工程局有限公司,上海200120 [3]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150009

出　　处：《粉煤灰综合利用》2024年第4期31-35,共5页Fly Ash Comprehensive Utilization

摘　　要：为研究大型动载设备基础混凝土裂缝控制,通过掺入粉煤灰和矿渣降低水化热,进行混凝土配合比优化设计,根据力学性能、绝热温升试验及混凝土温度及应力试验,分析优选混凝土配合比的抗裂性能。结果表明:优选混凝土配合比的内外温差基本小于25℃,满足规范要求,具有较好的抗裂性;浇筑仓块中心区域上表面产生拉应力,其余区域产生压应力,应力均小于对应龄期混凝土强度,满足裂缝控制要求。In order to study the crack control of concrete foundation of large dynamic load equipment,fly ash and slag were added to reduce the heat of hydration,and the optimal design of concrete mix was carried out.According to the mechanical properties,adiabatic temperature rise test and the measured results of concrete temperature and stress,the crack resistance of the optimal concrete mix was analyzed.The results show that the temperature difference between inside and outside of the optimum concrete mix ratio is less than 25 C,which meets the specification requirements and has good crack resistance.The tensile stress is generated on the upper surface of the central area of the cast silo block,and the compressive stress is generated in the remaining areas,and the stress is smaller than the strength of the corresponding age concrete,which meets the requirements of crack control.

关 键 词：大体积混凝土 配合比 内外温差 温度应力 裂缝控制 

分 类 号：TU528[建筑科学—建筑技术科学] TP183[自动化与计算机技术—控制理论与控制工程]