Excessively Wet Subgrade Improvement with 100％ Industry By-products for Heavy Traffic Pavement I.Solidification and Compaction Characteristics of Treated Soil
Deformation of excessively wet subgrade is often problematic during pavements construction as well as under regular vehicular traffic loads.In order to create a sturdy and stable platform for heavy traffic pavement,a green materials based entirely on industry byproduct of combination fly ash (FA) with carbide lime (CL) and flue gas desulfurization gypsum (FGDG) was proposed in this study.In order to investigate the effectiveness and improvement of engineering properties,solidification test and compaction test were carried out in laboratory,and Dynamic Cone Penetrometer (DCP) was conducted at the construction site.Investigation results showed significant improvement in drying rate,workability,and mechanical behavior.The addition of FA/CL/FDG stabilizer increases the solids content by bulking and reduces the free moisture through hydration reactions.The addition of FA/CL/FGDG leads to an increase of approximately 18％ in the maximum allowable moisture content,which would largely facilitate the compaction of the excessively wet soils.Post construction evaluation using DCP indicates the stabilized soil can be utilized under high volume traffic condition.
Pavement Wet subgrade compaction Soil improvement Industry byproduct Fly ash Carbide lime Flue gas desulfurization gypsum.
Yuan Xizhong Liu Fei Cui Wei Liu Chengcheng
Key Laboratory for Special Area Highway Engineering of Ministry of Education,Changan University,Xian 710064,China
国际会议
哈尔滨
英文
1560-1564
2010-07-24（万方平台首次上网日期，不代表论文的发表时间）