摘要
长期辐射环境作用下,混凝土力学性能会发生退化影响堆坑混凝土结构乃至核电站的长寿期运行。以核辐射环境下混凝土及其组分的体积和力学性能的多尺度演化为主线,回顾分析相关研究成果。现有研究对核辐射诱导矿物组分、骨料、硬化水泥浆及混凝土的体积变化和力学性能演化机理和规律有了基本的认识,建立了混凝土体积膨胀和力学性能多尺度演化的基本数值模型。为可靠预测辐照混凝土力学性能,需要充分关注骨料的随机分布和不同组分的辐照效应差异,建立基于矿物组成的辐照混凝土力学性能退化的多尺度模型。
The mechanical properties of concrete under the effect of long-term radiation are significantly degraded,affecting the long-term operation of existing nuclear power plants.The state-of-the-art on multi-scale evolution of the volume and mechanical properties of concrete under radiation was reviewed and analyzed.It was indicated that the evolution mechanism of volume and mechanical properties of minerals,aggregates,hardened cement paste,and concrete have been understood,and the multi-scale numerical model to predict the performance degradation of irradiated concrete has been developed.However,it was suggested that the multi-scale model of irradiated concrete based on mineral composition should be developed for reliable prediction of the volume and mechanical property,considering the randomly distributed aggregates at the mesoscale level and the differences in irradiation effects of the components.
作者
张伟平
刘辉
廖开星
周勇
黄瑛
ZHANG Weiping;LIU Hui;LIAO Kaixing;ZHOU Yong;HUANG Ying(Department of Structural Engineering,College of Civil Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Performance Evolution and Control for Engineering Structures(Tongji University),Ministry of Education,Shanghai 200092,China;Suzhou Nuclear Power Research Institute Co.,Ltd.,Suzhou 215004,Jiangsu,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2023年第8期2054-2061,共8页
Journal of The Chinese Ceramic Society
基金
国家重点研发计划(2020YFB1901500)。
关键词
混凝土
中子辐射
Γ辐射
体积膨胀
性能退化
多尺度模型
concrete
neutron radiation
γradiation
swelling
performance degradation
multi-scale model
