摘要
【目的】探求黄土掺量对粉煤灰最大干密度和渗透特性的影响。【方法】分别向粉煤灰中掺加质量分数为0%,10%,20%,30%,40%和50%的黄土,进行击实试验及不同压实度(98%,93%,85%)下的渗透试验,研究掺土量对粉煤灰最大干密度和渗透特性的影响。【结果】掺土粉煤灰最大干密度是所掺黄土最大干密度和粉煤灰最大干密度的线性组合,当掺黄土量为50%时,粉煤灰的最大干密度较纯粉煤灰提高45%;随着掺土比例和压实度的增大,粉煤灰的渗透系数明显减小,其中压实度为98%和85%时,50%的掺土量可将粉煤灰的渗透系数减小到原来的23.8%;压实度为93%时,50%掺土量可将粉煤灰渗透系数减小到原来的14.5%。【结论】掺土粉煤灰的最大干密度增加,渗透性减弱。
[Objective] The research studied effects of loess addition amount on the maximum dry density and permeability. [Method] Respectively 0%, 10%,20% ,30% ,40% and 50% of loess was added to fly ash, compaction test and seepage test under different coefficients of consolidation （98 %, 93 %, 85 %） of fly ash added by different amounts of loess were operated to study the effects of loess addition amount on the maximum dry density and permeability. [Result] Maximum dry density of the mixture is the linear combination of loess maximum dry density and fly ash maximum dry density. When 50% loess was added, the dry density of fly ash increased by 45 %. Also, with the increase of the proportion of soil added and the degree of compaction, the fly ash permeability reduced significantly. When coefficient of compaction was 98% and 85% ,the permeability coefficient of fly ash reduced to 23. 8% of the original;while at 93%,it was 14.5%of the original. [Conclusion] The maximum dry density increased while the permeability weakened after adding loess into fly ash.
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2009年第9期219-223,共5页
Journal of Northwest A&F University(Natural Science Edition)
基金
教育部新世纪优秀人才支持计划项目(NCET-06-0864)
关键词
粉煤灰
黄土掺量
干密度
渗透特性
fly ash
amount of loess added
dry density
permeability
