摘要
红土是一种广泛分布的具有高孔隙比、高含水率、高强度和低压缩性的区域性特殊土.红土中存在有大量的游离氧化铁.游离氧化铁含量的多少,以及其存在形态的不同都将对红土的工程地质性质产生很大影响.通过人为地向原扰动红土中加入游离氧化铁的方法,对恒温60℃养护80 d后的试样进行物理、力学、化学试验,试验发现,在控制其他条件一定的前提下,红土中游离氧化铁含量越高,土颗粒的团聚度越高,土的强度也越高,并通过扫描电镜图片从微观的角度定性的验证了这一结论,阐述了游离氧化铁对红土产生结构连结作用的机理.
Red soil is a widely regional special soil which has high porosity ratio, content, high strength high water and low compressibility. There are a lot of free iron oxide inside it. The content of free iron oxide and how it exists in the soil will bring great influence to engineering geology properties of red soil. Through adding free iron oxide to disturbed soil, carrying on the physical, mechanical, chemical test after 80 days＇ s curing which maintain 60 ℃, this paper find that when other condition is kept same, the higher content of free iron oxide, the higher strength and more agglomerated particle the red soil has. The conclusion is also verified from microscopic view by scanning electron microscope（SEM） photograph. Explains the mechanism of what the free iron oxide has done to structural connection of red soil.
出处
《哈尔滨商业大学学报（自然科学版）》
CAS
2007年第1期53-57,共5页
Journal of Harbin University of Commerce：Natural Sciences Edition
关键词
红土
游离氧化铁
胶结
微观结构
red soil
free iron oxide
cementation
microstructure
