摘要
再生细骨料存在高吸水性及多孔隙的缺点。粉煤灰和砖粉作为矿物掺合料,具有较好的填充效应、活性效应和微集料效应。试验将粉煤灰和砖粉分别掺入到再生抹灰砂浆,研究在不同胶砂比条件下制备再生砂浆的28d收缩率和冻融25次后冻融指标。试验结果表明:掺入适量的粉煤灰和砖粉可以有效改善再生抹灰砂浆的性能,提高其耐久性和工程应用价值。
The drawbacks of high-water absorption and porous structure exist in recycled fine aggregate.Fly ash and brick powder,as mineral admixtures,have beterfilling effect,active effect and micro-aggregate effect.The experiment mixed fly ash and brick powder separately into recycled plaster mortar,and studied the 28-day shrinkage rate and freeze-thaw index of recycled mortar prepared under different cementitious sand ratios.The experimental results indicate that adding an appropriate amount of fly ash and brick powder can effectively improve the performance of recycled plaster mortar,enhance its durability and engineering application value.
作者
马建斌
胡宇航
MA Jianbin;HU Yuhang(Chongqing Water Resources and Electric Engineering College,Chongqing 402160,China)
出处
《北京工业职业技术学院学报》
2023年第2期6-10,共5页
Journal of Beijing Polytechnic College
基金
重庆市教育委员会科学技术研究项目(KJQN202003803)
重庆水利电力职业技术学院科研资助项目(K202022)
重庆水利电力职业技术学院2022年度“挑战杯”大学生学术科技作品专项项目(TZB202223)。
关键词
再生砂浆
矿物掺合料
干燥收缩
抗冻性
recycled mortar
mineral admixtures
dry shrinkage
freeze-thaw durability
