摘要
采用水泥固化方法,以渣土为主要原材料制备轻集料,为更好地处置城市建筑渣土探索新的途径.首先评价了水泥对渣土的固化效果,然后使用圆盘造粒机制备免烧渣土轻集料,主要研究了水泥掺量对渣土轻集料堆积密度以及筒压强度的影响规律.结果表明:在5%~15%的水泥掺量范围内,水泥固化渣土的抗压强度与水泥掺量呈线性关系;用水量为35%左右时,可制备出粒径分布主要在10~20 mm的轻集料,所制备轻集料的堆积密度等级分布在900~1100 kg/m^(3)范围内;渣土轻集料的筒压强度随水泥掺量的增加而增大,而且渣土轻集料的28 d筒压强度与水泥固化渣土的28 d抗压强度呈较好的线性关系,可用后者预测渣土轻集料的力学性能,提高渣土轻集料配合比设计的准确性.
In order to better dispose the urban construction waste soil,the waste soil is used as the main raw material and is solidified by cement to prepare unburnt lightweight aggregate.The solidified effect of cement on waste soil is evaluated,then the unburnt lightweight aggregate is prepared using a disc pelletizer,and the influence of cement content on the packing density and compressive strength in cylinder of lightweight aggregate is investigated.The results indicate that with the cement content from 5%to 15%,the compressive strength of waste soil solidified by cement is linearly related with the cement content.With the appropriate water content of about 35%,the lightweight aggregate with size of 10-20 mm could be prepared,and the packing density of the prepared lightweight aggregate ranges from 900 to 1100 kg/m^(3).The compressive strength in cylinder of lightweight aggregate increases with the increase of cement content,and a good linear relationship between the compressive strength in cylinder of lightweight aggregate and the compressive strength of waste soil solidified by cement is obtained,which could predict the mechanical properties of lightweight aggregate to precisely design the mix proportion of unburnt lightweight aggregate of waste soil.
作者
蔡基伟
张瑞芳
周奕菡
许鸽龙
吕宁伟
闫文哲
CAI Jiwei;ZHANG Ruifang;ZHOU Yihan;XU Gelong;LYU Ningwei;YAN Wenzhe(Kaifeng Research Center for Engineering Repair and Material Recycle,Henan University,Henan Kaifeng475004,China;Xinyang University,Henan Xinyang464000,China)
出处
《河南大学学报（自然科学版）》
CAS
2021年第4期466-472,共7页
Journal of Henan University:Natural Science
基金
河南省科技发展计划项目(152102210053)
2021年河南省科学院科技开放合作项目(210909015)
关键词
渣土
水泥
免烧轻集料
堆积密度
筒压强度
waste soil
cement
unburnt lightweight aggregate
packing density
compressive strength in cylinder
