期刊文献+

粉煤灰再生混凝土力学性能试验研究

Experimental Study on Mechanical Properties of Fly Ash Recycled Concrete
下载PDF
导出
摘要 利用试验检测机构废弃的混凝土试块作为再生粗骨料的原材料,配制不同粗骨料取代率的混凝土,再加入适量粉煤灰,制成试件(取代率分别为0、30%、60%和100%),用于混凝土立方体抗压、劈裂抗拉、轴心抗压和弹性模量试验,通过观察其破坏过程和破坏形态,获取荷载-位移全过程曲线,研究并提出了本构方程。试验结果表明,粉煤灰再生骨料混凝土与天然骨料混凝土相比,各项力学指标随着再生骨料取代率的增大先是呈现增长趋势,当达到峰值后,各项力学指标均下降;两者的应力-应变曲线具有相似的形状,在上升阶段,再生混凝土与天然混凝土的应力-应变曲线变化不大,但在下降段再生混凝土的应力-应变曲线急剧下降。 Using discarded concrete test blocks from testing institutions as raw materials for recycled coarse aggregates,concrete with different replacement rates of coarse aggregates is prepared,and appropriate amounts of fly ash are added to make specimens(with replacement rates of 0,30%,60%,100%,respectively)for concrete cube compression,splitting tensile,axial compression,and elastic modulus tests.By observing the failure process and failure mode,the load-displacement full process curve is obtained,and the constitutive equation is studied and proposed.The test results show that compared with natural aggregate concrete,various mechanical indicators of fly ash recycled aggregate concrete first show an increasing trend with the increase of the replacement rate of recycled aggregate,and when reaching the peak,all mechanical indicators decrease.The stress-strain curves of both have similar shapes.In the ascending phase,the stress-strain curves of recycled concrete and natural concrete do not have change much,but in the descent phase,the stress-strain curve of recycled concrete drops sharply.
作者 陈晋华 周娉婷 林爱萍 张杰 CHEN Jinhua;ZHOU Pingting;LIN Aiping;ZHANG Jie(School of Civil Engineering,Fujian Chuanzheng Communications College,Fuzhou 350001,China;Fujian Gongda Geotechnical Engineering Institute,Fuzhou 350108,China)
出处 《长春工程学院学报(自然科学版)》 2024年第3期18-24,共7页 Journal of Changchun Institute of Technology:Natural Sciences Edition
基金 福建省交通运输厅科技项目(Z202212160)。
关键词 粉煤灰再生混凝土 骨料替代率 抗压强度 弹性模量 应力-应变关系 本构方程 recycled fly ash concrete aggregate replacement rate compressive strength elastic modulus relationship between tress and strain constitutive equation
  • 相关文献

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部