摘要
分别采用物理磨耗和化学增强对再生集料进行强化,研究两种强化方式后的再生集料吸水率和压碎值的变化规律,研究发现:当洛杉矶磨耗仪转动磨耗圈数为400圈及钢球数为4个时,物理磨耗强化效果最好;硅酸钠溶液能够显著降低再生集料的吸水率和压碎值,当硅酸钠溶液浓度为5%,浸泡时间为2h时,对再生集料强化效果最好。通过观察两种强化方式下再生集料新旧混凝土界面微观形貌,发现经硅酸钠溶液强化后的再生集料表面水化程度较高,新旧混凝土界面粘结性较好。
Physical abrasion and chemical reinforcement were used to strengthen the reclaimed aggregates.The water absorption and crushing value of the reclaimed aggregates after the two strengthening methods were studied.The study found that:when the Los Angeles abrasion meter rotates 400 cycles And when the number of steel balls is 4,the physical abrasion strengthening effect is the best;the sodium silicate solution can significantly reduce the water absorption and crushing value of the regenerated aggregate.When the concentration of the sodium silicate solution is 5%and the immersion time is 2h,It has the best strengthening effect on recycled aggregates.By observing the microscopic morphology of the interface between the new and old recycled aggregates under the two strengthening methods,it is found that the surface of the recycled aggregates strengthened by sodium silicate solution has a higher degree of hydration.Good adhesion.
作者
张谭龙
柳林凯
Zhang Tanlong;Liu Linkai(China Construction West Construction Hunan Co.Ltd.,Changsha,Hunan 410000)
出处
《江西建材》
2020年第S01期43-45,48,共4页
Jiangxi Building Materials
关键词
再生集料
表面强化
界面结构
粘结性
Recycled aggregate
Surface strengthening
Interface structure
Cohesiveness
