干旱区生态环境知识资源中心(Arid): 固化沙漠风积砂土强度特性分析

Arid

	固化沙漠风积砂土强度特性分析
其他题名	Analysis on Intensity Characteristics of Stabilized Desert Aeolian Sandy Soil
	刘俊芳; 苏跃宏
来源期刊	公路交通科技
ISSN	1002-0268
出版年	2016
卷号	33 期号:7 页码:53-57
中文摘要	为研究固化沙漠风积砂土的强度特性,扩大其在道路工程中的应用范围,从强度角度分析其作为路面结构底基层的适用性。采用路面材料强度仪测定了不同固化剂含量的固化沙漠风积砂土的无侧限抗压强度值,利用电镜扫描(SEM)技术对风积砂土以及添加了PX固化剂的固化风积砂土的微观结构进行分析,结合二者揭示固化沙漠风积砂土的强度特性及强度形成机理。研究结果表明:(1)掺量为10%的PX固化剂固化风积砂土,其7 d无侧限抗压强度达到路面结构底基层的强度要求;(2)固化土强度与固化剂掺量有关,10%为最佳掺量;(3)SEM图像显示风积砂土加入固化剂后,形成一部分由凝胶体和团粒组成的粒间填充物,使土体间的黏结强度发生变化,这是其强度增长的主要原因。
英文摘要	In order to research the strength characteristics of stabilized desert aeolian sandy soil and expand its application scope in road engineering,its suitability for pavement subbase is analysed in the light of strength. The unconfined compressive strengths of the curing desert aeolian sandy soil with different contents of curing agent are measured using the pavement material strength meter. The microstructures of aeolian sandy soil and the solidified aeolian sandy soil which added curing agent are analysed using scanning electron microscope (SEM). The strength characteristics and the strength mechanism of the solidified aeolian sandy soil are revealed based on these analyses. The result shows that (1) for solidified aeolian sandy soil with the dosage of 10% PX, the 7 d unconfined compressive strength can achieve the requirements of strength of the pavement subbase; (2) the strength of solidified soil is associated with curing agent dosage, and the dosage of 10% is the best; (3) the SEM image shows that after adding curing agent, a part of aeolian sandy soil formed gel and aggregate intergranular filler, which changed the adhesive strength between the soil particles, this is the chief reason for the increase in the strength.
中文关键词	道路工程 ; 风积砂土 ; 扫描电镜(SEM) ; 微观结构 ; PX固化剂
英文关键词	road engineering aeolian sandy soil SEM microstructure PX curing agent
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINING MINERAL PROCESSING
WOS研究方向	Mining & Mineral Processing
CSCD记录号	CSCD:5762145
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234418
作者单位	内蒙古工业大学大学土木学院, 呼和浩特, 内蒙古 010051, 中国
推荐引用方式 GB/T 7714	刘俊芳,苏跃宏. 固化沙漠风积砂土强度特性分析[J],2016,33(7):53-57.
APA	刘俊芳,&苏跃宏.(2016).固化沙漠风积砂土强度特性分析.公路交通科技,33(7),53-57.
MLA	刘俊芳,et al."固化沙漠风积砂土强度特性分析".公路交通科技 33.7(2016):53-57.