摘要
为了研究0,50,100,150次冻融循环作用后,塑钢纤维掺量对轻骨料混凝土弯曲韧性、冲击韧性的影响规律,对塑钢纤维掺量分别为0,3,6,9kg/m^3的高强轻骨料混凝土分别进行弯曲韧性试验和抗冲击性能试验,实测了轻骨料混凝土的荷载-挠度关系、初裂冲击次数、破坏冲击次数,并计算了初裂耗能和破坏耗能。结果表明:冻融环境下,掺入塑钢纤维能显著提高轻骨料凝土弯曲韧性及抗冲击性能;冻融150次后,塑钢纤维掺量为9kg/m^3轻骨料混凝土的累积耗能为素轻骨料混凝土的115倍。
In order to study the influence of plastic-steel fiber content on flexural toughness and impact toughness of lightweight aggregate concrete after 0,50,100,150 freeze-thaw cycles.Bending toughness test and impact resistance test for high strength lightweight aggregate concrete with plastic-steel fiber content of 0,3,6,9 kg/m^3 respectively were carried out.The load-deflection relationship of the lightweight aggregate concrete,the number of initial cracking impacts,the number of damages,and the energy consumption of the initial cracking and the energy of the failure were calculated.The results show that in the freeze-thaw environment,the incorporation of plastic-steel fiber can significantly improve the bending toughness and impact resistance of lightweight aggregate concrete.After 150 freeze-thaw cycles,the cumulative energy consumption of lightweight aggregate concrete with plastic-steel fiber content 9 kg/m^3 is 115 times that of plain lightweight aggregate concrete.
作者
牛建刚
左付亮
王佳雷
Niu Jiangang;Zuo Fuliang;Wang Jialei(College of Civil Engineering,Inner Mongolia University of Science and Technology,Baotou 014000,China;College of Civil Engineering,Central South University,Changsha 410000,China)
出处
《建筑结构》
CSCD
北大核心
2019年第10期85-88,共4页
Building Structure
基金
国家自然科学基金项目(51368042)
关键词
冻融循环
塑钢纤维
轻骨料混凝土
弯曲韧性
抗冲击性能
freeze-thaw cycle
plastic-steel fiber
lightweight aggregate concrete
bending toughness
impact resistance
