不同加热方式下高温后防辐射混凝土的性能研究  

Study on properties of radiation shielding concrete after high temperature under different heating modes

作　　者：王若祥 陈振富 陶秋旺 谢利平 WANG Ruoxiang;CHEN Zhenfu;TAO Qiuwang;XIE Liping(School of Civil Engineering,University of South China,Hengyang 421001,China;Hunan Provincial Key Laboratory of High Performance Special Concrete,Hengyang 421001,China;CNNC Key Laboratory of Civil Engineering and Intelligent Building Structure,Hengyang 421001,China)

机构地区：[1]南华大学土木工程学院,湖南衡阳421001 [2]高性能特种混凝土湖南省重点实验室,湖南衡阳421001 [3]中核集团土木工程与智能建筑结构重点实验室,湖南衡阳421001

出　　处：《混凝土与水泥制品》2024年第3期79-83,89,共6页China Concrete and Cement Products

基　　金：国家自然科学基金项目(51678286);湖南省教育厅科研项目(14C0971)。

摘　　要：以磁铁矿为骨料制备了防辐射混凝土,研究了不同加热方式(微波辐射加热、马弗炉加热)和温度(25~800℃)对防辐射混凝土外观形貌、抗压强度、超声波波速和屏蔽性能的影响。结果表明:在相同加热方式下,随着温度的升高,试件的外观形貌劣化程度加重,抗压强度、超声波波速、屏蔽性能均降低;与马弗炉加热相比,微波辐射加热在各个温度区间内对试件造成的损伤均较大。Radiation shielding concrete was prepared by using magnetite as aggregates,and the effects of different heating modes(microwave radiation heating,muffle furnace heating)and temperatures(25~800℃)on the apparent morphology,compressive strength,ultrasonic wave velocity,and shielding performance of radiation shielding concrete were studied.The results show that under the same heating mode,as the temperature increases,the deterioration degree of the apparent morphology of the specimen increases,and the compressive strength,ultrasonic wave velocity,and shielding performance of the specimen decrease.Compared with muffle furnace heating,microwave radiation heating causes greater damage to the specimen in various temperature ranges.

关 键 词：微波辐射加热 马弗炉加热 磁铁矿骨料 混凝土 屏蔽性能 

分 类 号：TU528.35[建筑科学—建筑技术科学]