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The Variation of MBER Stabilized Soil Strength and Development of a New Liquid Soil Stabilizer

Author: HanXinLai
Tutor: GaoJianEn
School: Northwest University of Science and Technology
Course: Agricultural Soil and Water Engineering
Keywords: soil stabilizer soil adaptability characters of stabilized soil a new liquid soil stabilizer
CLC: TU411
Type: Master's thesis
Year: 2009
Downloads: 92
Quote: 1
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Abstract

The soil stabilizers are high cost performance additives that can make the most of local soil and water resources, and can obviously improve the engineering properties of the soil. This thesis deals with MBER soil stabilizer independent research, based on the others productions’disadvantages of week strength,unti-seepage and freeze-thaw resistance of the stabilized-soil at the present, reseaching its soil adaptability, soil-stabilizing mechanism, and stabilized-soil capabilities,and screens out a new ingredient of the liquid stabilizer. The main conclusions are listed as follows:1、The soil’s maximum dry density increases and optimum water content minishs with content of the sand in the soil through the compaction test of seven soil samples from different areas of Loess Plateau. The optimum water content gradually increases from northwest to southeast.Corresponding with the optimum water content, the maximum dry density minishs .2、The intensity of the stabilized soil increases with the dosage’s increasing at the same condition of soil and water content.Before reaching 12% the intensity range has obvious change,but after 15% has no obvious change.Based on the principle of“economical、efficient、durable”,the content of MBER soil stabilizer is initiatively set as about 15%,but the specific is determined by the test .3、The intensity of the stabilized soil rise perpendicularly with the same content of soil stabilizers and optimum water content of different soil. The intensity of the sample is between 2.8～5.46Mpa at the condition of 28d state、the optimum water content、degree of compaction 0.94. Considering of the designing requirement of the stabilizers engineering and economic factor for construction,we suggest that degree of compaction should be controled above the level of 0.94.4、As clay content increases, the intensity of MBER solidified loess within limited extent increases from northwest to southeast in loess plateau region. As clay content is below 17%, the intensity of solidified soil declines with its increase, on the contrary between 17.0% and 25%, and the same above 25.0%, but the range is quite small. MBER is added into soil body, sand particles and powder particles similar to aggregates belongs to inert substance. They do not mix in the hydrolysis and hydration reaction of the substance in MBER soil curing agent. Thus, although the clay content of sense finding soil is lower, the intensity is higher owing to higher sand particles and powder particles. As the surface area of clay is large and has a certain degree of activity , carrying out a variety of physical and chemical reactions with MBER, the intensity increases with content of the clay.5、The research of the new type of the liquid stabilizer indicates that the ingredient using sodium sulfate、sodium tripolyphosphate、carbamide、Polyscrylamide、lauryl sodium sulfate、triethanolamine and sodium silicate, its 7d state’s unconfined compressive strength has reached 2.38～2.66Mpa,and its 28d state is .35～3.78 Mpa,so it has a good exploration prospect.

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