碳化硅混凝土微波加热效率及抗冻性  

Microwave Heating Efficiency and Frost Resistance of Silicon Carbide Concrete

作　　者：王志航 白二雷[1] 刘俊良 黄河[1] WANG Zhi-hang;BAI Er-lei;LIU Jun-liang;HUANG He(Aeronautics Engineering College,Air Force Engineering University,Xi’an 710038,China;PLA Unit 95338,Chengdu 611430,China)

机构地区：[1]空军工程大学航空工程学院,西安710038 [2]中国人民解放军95538部队,成都611430

出　　处：《科学技术与工程》2022年第20期8821-8827,共7页Science Technology and Engineering

基　　金：国家自然科学基金(51908548);国家人民防空办公室立项课题(RF20SC01J-S0);军队科研面上项目(CKY14J017)。

摘　　要：为解决除冰效率、微波对混凝土抗冻性的影响等对微波除冰技术实际应用的制约,通过微波加热试验、冻融循环试验、扫描电子显微镜(scanning electron microscope, SEM)试验及压汞法(mercury intrusion porosimetry, MIP)试验,对碳化硅混凝土的微波加热效率、抗冻性及冻融循环前后的微观结构进行研究。结果表明:掺加碳化硅能够提高混凝土的微波加热效率和抗冻性。随着碳化硅掺量的增加,混凝土的温升速率逐渐增大,微波加热效率提高,有效除冰范围增大。当碳化硅掺量为10%时,混凝土相对动弹性模量最大,质量损失率最小,抗冻性最佳。掺加碳化硅使混凝土内部孔隙增大,冻融循环使混凝土孔隙孔径增大,少害孔以及有害孔增多。In order to solve the constraints on the practical application of microwave deicing technology,such as the deicing efficiency and the effect of microwave on concrete frost resistance,through microwave heating test,freeze-thaw cycle test,scanning electron microscope(SEM)test and mercury intrusion porosimetry(MIP)test,the microwave heating efficiency,freeze resistance and microstructure of silicon carbide concrete before and after the freeze-thaw cycle were studied.The results show that the addition of silicon carbide can improve the microwave heating efficiency and frost resistance of concrete.As the content of silicon carbide increases,the temperature rise rate of concrete gradually increases,the microwave heating efficiency increases,and the effective deicing range increases.When the content of silicon carbide is 10%,the relative dynamic elastic modulus of concrete is the largest,the mass loss rate is the smallest,and the frost resistance is the best.The addition of silicon carbide increases the internal pores of the concrete,and the freeze-thaw cycles increase the pore size of concrete,and increase the number of less harmful pores and harmful pores.

关 键 词：混凝土 碳化硅 微波加热 抗冻性 微观结构 

分 类 号：TU528[建筑科学—建筑技术科学]