摘要
基于试验探究改性碳纤维增强聚苯乙烯(PS/MCF)混凝土保温性能及在冲击荷载作用下力学性能变化规律,对试件质量、纵波波速、保温性能、峰值应力、动态增强因子(DIF)及能量耗散规律开展试验研究。结果表明:PS/MCF的掺入会降低试件密度及纵波波速,增强材料保温性能,且掺量在10%时试件保温性能最佳。PS/MCF掺量在5%、10%、15%、20%时试件应力降幅为3.88%、9.61%、20.34%、32.71%,PS/MCF的掺入使得试件强度均存在降低,但PS的改性使得试件应力降幅显著减小。随着PS/MCF掺量的增加,在相同冲击荷载作用下试件耗散能呈先增大后稳定趋势。PS/MCF的掺入在一定程度上会降低试件压缩强度,但也极大增强混凝土材料的韧性、塑性能力,试件吸能效果随之提升。
Based on the experimental exploration of the thermal insulation performance of modified carbon fiber reinforced polystyrene(PS/MCF)concrete and the variation law of mechanical properties under impact loading,experimental studies were carried out on the specimen mass,longitudinal wave velocity,thermal insulation performance,peak stress,dynamic strengthening factor(DIF)and energy dissipation law.The results show that the incorporation of PS/MCF can reduce the density of the specimens and the longitudinal wave velocity,enhance the thermal insulation performance of the materials,and the thermal insulation performance of the specimens is the best when the incorporation amount is 10%.When the dosage of PS/MCF was 5%,10%,15%,and 20%,the stress reduction of the specimens was 3.88%,9.61%,20.34%,and 32.71%respectively.The incorporation of PS/MCF led to a decrease in the strength of the specimens,but the modification of PS significantly reduced the stress reduction of the specimens.With the increase of the dosage of PS/MCF,the dissipation energy of the specimens under the same impact load shows a trend of increasing first and then stabilizing.The addition of PS/MCF will reduce the compressive strength of the specimens to a certain extent,but it also greatly enhances the toughness and plasticity of the concrete materials,and the effect on energy absorption of the specimens is improved accordingly.
作者
位宁宁
翟婷
Wei Ningning;Zhai Ting(School of Civil Engineering,Xinyang University,Xinyang,Henan 464000,China)
出处
《黑龙江工业学院学报(综合版)》
2025年第4期151-156,共6页
Journal of Heilongjiang University of Technology(Comprehensive Edition)
基金
2025年度河南省科技攻关项目(项目编号:252102320049)
信阳学院校级科研项目(项目编号:2024-XJLYB-019)。
关键词
PS/MCF
混凝土
纵波波速
力学性能
导热系数
PS/MCF
concrete
longitudinal wave velocity
mechanical property
thermal conductivity
作者简介
位宁宁,硕士,助教,信阳学院土木工程学院。研究方向:混凝土建筑材料;翟婷,硕士,助教,信阳学院土木工程学院。研究方向:混凝土建筑材料。
