污水处理池用大体积混凝土抗裂技术研究与应用  

Research and application of anti-cracking technology of mass concrete for sewage treatment pool

作　　者：陈璋勇 马安 汪洋 CHEN Zhangyong;MA An;WANG Yang(Nantong Gusheng Building Materials Co.,Ltd.,Nantong 226001,China;Jiangsu Sobute New Materials Co.,Ltd.,State Key Laboratory of High Performance Civil Engineering Materials,Nanjing 211103,China)

机构地区：[1]南通固盛建材有限公司,江苏南通226001 [2]江苏苏博特新材料股份有限公司高性能土木工程材料国家重点实验室,江苏南京211103

出　　处：《混凝土与水泥制品》2024年第12期42-46,共5页China Concrete and Cement Products

基　　金：国家重点研发计划项目(2023YFB3711400)。

摘　　要：为解决南通某污水处理池大体积混凝土易开裂的问题,通过优化配合比、掺入适量抗裂剂等措施设计了抗裂混凝土,研究了抗裂混凝土的抗压强度、绝热温升、自生体积变形,并对实体结构混凝土进行了现场温度、变形监测。结果表明:掺入适量抗裂剂并适当降低水泥用量能有效改善混凝土的绝热温升和自生体积变形,且对抗压强度无太大影响;监测段混凝土各结构部位的温峰在41.6~42.1℃范围内,最大温升值在21.2~22.1℃范围内,混凝土里表温差最大值为5.8℃;混凝土各结构部位的变形表现为持续膨胀;在整个监测期内,监测段混凝土未出现开裂。In order to solve the problem of easy cracking of mass concrete in a sewage treatment pond in Nantong,anti-cracking concrete was designed by optimizing the mix proportion and adding appropriate content of anti-cracking agent.The compressive strength,adiabatic temperature rise,and self-generated volumetric deformation of the anti-cracking concrete were investigated,and the temperature and deformation of the solid structural concrete were monitored on-site.The results show that,adding appropriate content of anti-cracking agent and appropriately reducing the content of cement can effectively improve the adiabatic temperature rise and self-generated volumetric deformation of concrete,and there is no great influence on the compressive strength.The peak temperature of each structural part of the concrete of the monitored section is in the range of 41.6~42.1℃,and the maximum value of temperature rise is in the range of 21.2~22.1℃,and the maximum value of temperature difference between the surface and the interior of the concrete is 5.8℃.The deformation of all structural parts of the concrete exhibits continuous expansion.Throughout the monitoring period,there is no occurrence of cracks in the concrete of the monitored section.

关 键 词：大体积混凝土 裂缝控制 抗裂剂 温升 变形 

分 类 号：TU528.5[建筑科学—建筑技术科学]