摘要
为研究陶瓷颗粒的取代率对再生混凝土在火灾以及火灾扑救条件下的外观形貌、抗压强度、质量损失的影响,设计不同配比,结合SEM分析不同掺量下的陶瓷再生混凝土宏观形貌、微观结构的变化规律。并基于微观性能,揭示陶瓷再生混凝土强度变化机理。研究结果表明:陶瓷颗粒较强的耐高温能力使各组陶瓷再生混凝土的耐火性均强于普通再生混凝土。随温度的升高,强度下降越来越明显,温度低于200℃时,各组陶瓷再生混凝土的抗压强度不降反升,保持良好的力学性能。陶瓷颗粒掺量为30%时,再生混凝土的抗高温损伤能力最佳。
In order to study the effect of replacement ratio of ceramic particles on the appearance,compressive strength and mass loss of recycled concrete under fire and fire fighting conditions,the macro-morphology and micro-structure of ceramic recycled concrete with different proportion were analyzed by SEM.Based on the microscopic properties,the strength changing mechanism of ceramic recycled concrete was revealed.The results show that the fire resistance of each group of ceramic recycled concrete is stronger than that of ordinary recycled concrete because of the high temperature resistance of ceramic particles.With the increase of temperature,the strength decreases more and more obviously,but when the temperature is lower than 200℃,the compressive strength of each group of ceramic recycled concrete does not decrease but rises,maintaining good mechanical properties.When the ceramic particle content is 30%,the high temperature damage ability of recycled concrete is the best.
作者
乔宏霞
彭宽
陈克凡
李江川
洪芬
QIAO Hong-xia;PENG Kuan;CHEN Ke-fan;LI Jiang-chuan;HONG Fen(The Key Laboratory of Civil Engineering and Disaster Prevention and Disaster Reduction in Gansu Province,Lanzhou University of Technology,Lanzhou 730050,China;Western Center of Disater Mitigation in Civil Engineering of Ministry of Education,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《硅酸盐通报》
CAS
北大核心
2019年第9期2902-2909,共8页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(51468039)
关键词
陶瓷再生混凝土
高温损伤
微观分析
火灾扑救
线性回归方程
ceramic recycled concrete
high temperature damage
microscopic analysis
fire fighting
linear regression equation
