冷却方式对于C60HPC高温性能及红外热像的影响  

Effect of cooling mode on high temperature performance and infrared thermal image of C60 HPC

作　　者：李彦君 高波[2] 樊亚男[3] LI Yanjun;GAO Bo;FAN Yanan(Shanxi Vocational University of Engineering and Technology,Jinzhong 030619,China;Shenyang Jianzhu University,Shenyang 110168,China;College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]山西工程科技职业大学,山西晋中030619 [2]沈阳建筑大学,辽宁沈阳110168 [3]太原理工大学土木工程学院,山西太原030024

出　　处：《混凝土》2021年第7期18-21,共4页Concrete

基　　金：山西省重点研发计划项目(201903D321113)。

摘　　要：研究了不同冷却方式下的钢纤维混凝土高温后的抗压强度及红外热像。研究结果表明:与自然冷却相比,C60钢纤维混凝土高温后水冷却表观损伤程度更大;与劈拉强度相比,高温对于混凝土抗压强度影响更大;钢纤维混凝土水冷却下抗压、劈拉强度下降幅度大于自然冷却的情况;在相同照射时间、受火温度下,C60钢纤维混凝土自然冷却的红外温升低于水冷却红外温升。红外温升25℃之前自然冷却红外温升低于水冷却,之后规律则恰好相反。The compressive strength and infrared thermal image of SFRC with different cooling modes after high temperature are studied.The results show that compared with natural cooling,the apparent damage degree of C60 steel fiber reinforced concrete after high temperature water cooling is higher.Compared with splitting tensile strength,high temperature has more influence on compressive strength of concrete.The decrease of compressive strength and splitting tensile strength of SFRC under water cooling is larger than that under natural cooling.Under the same irradiation time and fire temperature,the infrared temperature rise of natural cooling of C60 steel fiber concrete is lower than that of water cooling.The infrared temperature rise of natural cooling before the infrared temperature rise of 25℃is lower than that of water cooling,and then the law is just the opposite.

关 键 词：钢纤维混凝土 高温 冷却方式 抗压强度比 红外热像 

分 类 号：TU528.01[建筑科学—建筑技术科学]