大体积混凝土温度控制技术研究  

TECHNICAL RESEARCH ON TEMPERATURE CONTROL OF MASS CONCRETE

作　　者：杜毅[1] 

机构地区：[1]北京建工集团有限责任公司,北京100055

出　　处：《建筑技术》2014年第5期444-447,共4页Architecture Technology

摘　　要：基于《大体积混凝土施工规范》(GB 50496—2009)对不同龄期混凝土拉应力的前期计算判断混凝土的防裂性能,通过分析工程数据、建立计算模型后,以各龄期混凝土的允许拉应力为条件,确定升温阶段的里表温差增量及降温阶段的综合降温差增量。将以上计算结果运用到后期控温阶段,达到方便验算、使前期理论计算与后期实际操作紧密结合的目的,从而更有效地控制裂缝的产生。Based on crack resistance of concrete judged according to concrete tension stress at different periods calculated by using the method specified in Code for Construction of Mass Concrete （GB 50496-2009）, To determine incremental temperature difference of center and surface in the heating stage and general temperature drop increment in the cooling phase, Which is at the age of concrete allowable tensile stress condition, may be controlled through analysis on project data and computation model. These results calculated may be used for later temperature control, so as to realize convenient verification and combination between early theoretical calculation and later practical operation. Concrete crack could be effectively controlled.

关 键 词：大体积混凝土 应力 松弛系数 温差增量 控温 

分 类 号：TU544[建筑科学—建筑技术科学]