抗裂剂在筏板大体积混凝土结构中的应用  

Application of Anti-crack Agent in Raft Mass Concrete Structure

作　　者：何志兵 刘旷怡 阎宝宝 HE Zhi-bing;LIU Kuang-yi;YAN Bao-bao(Second Engineering Co,Ltd,Second Aviation Bureau of China Communications,Chongqing 401121,China;Wuhan Harbor Engineering Design&Research Institute Co,Ltd of CCCG,Wuhan 430040,China;Hubei Key Laboratory of Advanced Materials&Reinforcement Technology Research for Marine Environment Structures,Wuhan 430040,China)

机构地区：[1]中交二航局第二工程有限公司,重庆401121 [2]中交武汉港湾工程设计研究院有限公司,武汉430040 [3]海工结构新材料及维护加固技术湖北省重点实验室,武汉430040

出　　处：《建材世界》2024年第2期55-58,89,共5页The World of Building Materials

摘　　要：研究了抗裂剂对混凝土力学性能与干燥收缩性能的影响,通过有限元计算方法对比了抗裂剂掺量、养护条件、浇筑温度对筏板基础大体积混凝土开裂风险的影响,提出了经济合理的温度裂缝控制方案。结果表明,5%抗裂剂掺量下各龄期混凝土抗压及劈裂抗拉强度最高,56 d干燥收缩相比于普通混凝土降低了24.5%,采用节水保湿膜+棉被覆盖的养护措施,筏板基础取得良好控裂效果。The effects of anti-cracking agent on mechanical properties and drying shrinkage properties of concrete were studied.The effects of anti-cracking agent content,curing conditions and pouring temperature on cracking risk of raft foundation concrete were compared by finite element software,and an economical and reasonable temperature control scheme was proposed.The results show that the compressive and splitting tensile strength of concrete with 5%anti-cracking agent content was the highest,and the drying shrinkage of concrete at 56 d was 24.5%lower than that of ordinary concrete.The raft foundation achieved good crack control effect by using water-saving moisturizing film and cotton-covered maintenance measures.

关 键 词：抗裂剂 筏板基础 裂缝控制 大体积混凝土 

分 类 号：TU755.7[建筑科学—建筑技术科学]