船闸混凝土抗裂性能试验研究及开裂风险评估  

Crack resistance and cracking risk assessment of ship lock concrete

作　　者：潘利 嵇旭红 周泽聪 王育江 姚婷 PAN Li;JI Xuhong;ZHOUZecong;WANG Yujiang;YAO Ting(State Key Laboratory of High Performance Civil Engineering Materials,Jiangsu Sobute New Materials Co.,Ltd.,Nanjing 211103,China;Changzhou Port and Shipping Development Center,Changzhou 210096,China)

机构地区：[1]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 [2]常州市港航事业发展中心,江苏常州210096

出　　处：《水运工程》2023年第4期196-200,共5页Port & Waterway Engineering

基　　金：江苏省交通运输科技与成果转化项目(WCSN-KY1)。

摘　　要：针对船闸大体积混凝土容易发生开裂的问题,通过室内试验研究不同配合比混凝土的热力学及变形性能,并基于多场耦合模型对廊道结构混凝土进行开裂风险评估计算。研究结果表明:掺入抗裂剂减小混凝土干燥收缩且自生体积变形初期产生较大膨胀,显著提升混凝土体积稳定性和抗裂性能;抗裂剂可降低船闸廊道结构混凝土最大开裂风险系数40%以上,控制廊道混凝土各部位开裂风险在0.7以下,大大降低了结构混凝土开裂风险。Regarding the cracking problem of mass concrete of ship lock,the thermodynamic and deformation properties of concrete with different mix ratios are studied by laboratory tests.Based on multi-field coupling model,cracking risk calculation of corridor structure concrete has been carried out.The research results show that the addition of anti-cracking agent reduces the drying shrinkage and produces large expansion at the initial stage of autogenous volume deformation,which significantly improves the volume stability and anti-cracking performance of concrete.The anti-cracking agent can reduce the maximum cracking risk coefficient of the ship lock corridor structure concrete by more than 40%,and make the cracking risk of the corridor concrete below 0.7,which greatly reduces the risk of structural concrete cracking.

关 键 词：船闸 大体积混凝土 抗裂性能 开裂风险评估 

分 类 号：U641[交通运输工程—船舶及航道工程]