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Granite eluvial laterite structural strength the temperature of the Effect of research

Author: TangQunYan
Tutor: WangQing
School: Jilin University
Course: Geological Engineering
Keywords: Structural Temperature effect Cementation Free iron oxide Amorphous iron oxide Aging
CLC: P642.132
Type: Master's thesis
Year: 2005
Downloads: 124
Quote: 4
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Abstract


Clay is a widely distributed in tropical and subtropical humid areas with special engineering geological properties of the soil . With China's sustained and rapid economic development , clay in the south are largely used as building materials and building foundations . However, in the clay as a foundation , they generally are to be considered as a general cohesive its bearing capacity, failed to give full play to the foundations of clay bearing capacity , resulting in a waste of engineering . The clay soil from the higher structural strength of free iron oxide cementation . Therefore, this article for its structural strength, the structural strength of the material from the control - an important factor of free iron temperature starting to study the temperature at 30 ℃, 40 ℃, 50 ℃ three different temperatures , soil changes on free iron oxide soil structure strength. Its free iron oxide , amorphous iron and cation exchange capacity measured changes in comparative analysis to study the temperature effect , and the clay -like soil behind prepared by heating the mechanical properties were analyzed and found that sample preparation , the applied temperature the higher the longer the duration of heating , to improve its mechanical properties better. And then the clay with iron after heating soil samples prepared with and without iron sample test results were analyzed to find the temperature effect in the mechanism of clay and found the higher the heat , the soil amorphous iron aging faster , and the aging rate of the quantitative calculations and found that heating 50 ℃ 15 -day sample , the aging rate reached 51.77% . Temperature effect, converted into iron ions in the soil with cement capacity of free iron oxide, as well as soil amorphous iron oxide aging, so the iron from the soil turned into cement stronger form of crystalline iron oxide, so that the bond strength between the soil particles increased . leading to a higher soil structural strength.

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CLC: > Astronomy,Earth Sciences > Geology > Hydrogeology and Engineering Geology > Engineering Geology > Soil science > Special soil > Red earth
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