Abstract: Through the ultrasonic method, split tensile test, the heat of hydration test and integrated shrinkage-temperature-relative humidity test, elastic modulus, tensile strength, hydration and shrinkage deformation-temperature-relative humidity were studied. Results indicated that steam curing increased the elastic modulus and tensile strength of concrete. High temperature promoted the hydration rate and hydration degree of cement paste. A steam-cured cement paste hydration model was proposed. From steam curing to demoulding stage, the concrete presented an ‘expansion-shrinkage' change law. However, the deformation of steam-cured concrete dominated by drying shrinkage after demoulding. An integrated model of auto-shrinkage and total shrinkage of steam-cured concrete mixed with fly ash and slag after demoulding was proposed. The calculated values of this model are in good agreement with the experimental data. Finally, a cracking evaluation model for steam-cured concrete after demoulding under sealed conditions was proposed. It can be used for quantitative evaluation of crack formation of steam-cured concrete.
作者简介: 王鹏刚,青岛理工大学副教授、博士研究生导师。2014年6月博士毕业于青岛理工大学,2014—2016年在东南大学和江苏省建筑科学研究院从事博士后研究工作。2019—2020年于英国University College London作访问学者。主要从事混凝土耐久性、防护与修复研究。以第一/通讯作者发表SCI论文21篇、EI论文9篇。
引用本文:
王鹏刚, 付华, 郭腾飞, 田砾, 赵铁军. 蒸汽养护混凝土变形行为及开裂风险评估[J]. 材料导报, 2022, 36(24): 20120185-8.
WANG Penggang, FU Hua, GUO Tengfei, TIAN Li, ZHAO Tiejun. Deformation Behavior and Cracking Risk Assessment of Steam-cured Concrete. Materials Reports, 2022, 36(24): 20120185-8.
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2022, Vol. 36 
