硅酸盐通报2024，Vol.43Issue(7)：2479-2489,11.
预置轻骨料混凝土中灌浆料与轻骨料的匹配机制研究
Matching Mechanism Between Grouting Material and Lightweight Aggregate in Preplaced Lightweight Aggregate Concrete
摘要
Abstract
In this paper,lightweight and high strength grouting materials with different strength grades(60,75,90,100,110,120 MPa)were prepared.By compounding with different types and strengths of lightweight aggregate(high strength spherical fly ash ceramsite,low strength spherical fly ash ceramsite,gravel-shaped shale ceramsite),the matching mechanism between grouting material and lightweight aggregate in preplaced lightweight aggregate concrete was studied.The results show that there is a piecewise linear relationship between the strength of preplaced lightweight aggregate concrete and grouting material strength,and the slope of fitting curve can approximately reflect the utilization efficiency of the strength of grouting material.With the increase of the strength grade of grouting material,the utilization rate of concrete to the strength of grouting material decreases.The compressive strength and grain shape of aggregate also affect the utilization rate of the strength of grouting material.Due to the interlocking effect,the strength of lightweight aggregate concrete prepared by gravel-shaped shale ceramsite is significantly higher than that of concrete prepared by spherical fly ash aggregate with similar compressive strength.Two types of preplaced lightweight aggregate concrete with compressive strength of 81.2 MPa,dry apparent density of 1 735 kg/m3 and compressive strength of 68.2 MPa,dry apparent density of 1 520 kg/m3 were prepared by using high strength spherical fly ash ceramsite and gravel-shaped ceramsite,respectively.关键词
混凝土/轻骨料/轻质高强/预置轻骨料/骨料粒形Key words
concrete/lightweight aggregate/lightweight and high strength/preplaced lightweight aggregate/aggregate grain size分类
建筑与水利引用本文复制引用
王映祥,彭波,王健涛,刘云鹏..预置轻骨料混凝土中灌浆料与轻骨料的匹配机制研究[J].硅酸盐通报,2024,43(7):2479-2489,11.基金项目
国家自然科学基金(51972250) （51972250）
大学生创新创业训练计划(S202310497037) （S202310497037）
