Engineering characteristics of soil stabilised with saw dust ash and cement

IF 1.7 Q3 ENGINEERING, GEOLOGICAL

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-09-27 DOI:10.1080/17486025.2021.1981464

Tausif E Elahi, A. R. Shahriar, Md. Kausar Alam, Md. Zoynul Abedin

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引用次数: 2

Abstract

ABSTRACT The study herein investigates the performance of Saw Dust Ash (SDA) in combination with cement for soil stabilisation. Performance of SDA is studied with respect to compressive strength, shear strength, penetration and deformation responses. For a certain cement content, the compressive strength reaches a maximum value with the increase of SDA and the corresponding SDA content is defined as the optimum content. Optimum SDA content varies within 6–12% based on the percent of cement added. When optimum amount of SDA is added, 28 days’ compressive strength of 2406–5625 kPa was achieved for varying amount of cement (3–7%). The mechanical response is illustrated using microstructural observations. Results from direct shear tests revealed that with the inclusion of 6–15% SDA with cement, improved shear strength parameters (cohesion, angle of internal friction) can be obtained; an angle of internal friction as high as 40 was achieved herein. Compression index can be reduced by 32–41% compared to unstabilised soil if optimum amount of SDA-cement is added. It is concluded that considering compressive strength, shear strength, penetration resistance and compressibility, SDA can effectively be used along with cement for stabilisation of clay soil.

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锯末灰和水泥稳定土的工程特性

摘要本文研究了锯末灰（SDA）与水泥联合用于土壤稳定的性能。从抗压强度、剪切强度、渗透和变形响应等方面研究了SDA的性能。对于一定的水泥含量，随着SDA的增加，抗压强度达到最大值，相应的SDA含量被定义为最佳含量。最佳SDA含量在6–12%范围内变化，基于所添加水泥的百分比。当添加最佳量的SDA时，不同量的水泥（3-7%）可获得2406–5625 kPa的28天抗压强度。通过微观结构观察说明了机械响应。直剪试验结果表明，在水泥中掺入6–15%的SDA，可以改善抗剪强度参数（内聚力、内摩擦角）；在此实现了高达40的内摩擦角。如果添加最适量的SDA水泥，与未稳定的土壤相比，压缩指数可以降低32-41%。结果表明，考虑到抗压强度、抗剪强度、抗渗性和压缩性，SDA可以与水泥一起有效地用于粘土的稳定。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geomechanics and Geoengineering-An International Journal ENGINEERING, GEOLOGICAL-

CiteScore

3.80

自引率

0.00%

发文量

期刊介绍： Geomechanics is concerned with the application of the principle of mechanics to earth-materials (namely geo-material). Geoengineering covers a wide range of engineering disciplines related to geo-materials, such as foundation engineering, slope engineering, tunnelling, rock engineering, engineering geology and geo-environmental engineering. Geomechanics and Geoengineering is a major publication channel for research in the areas of soil and rock mechanics, geotechnical and geological engineering, engineering geology, geo-environmental engineering and all geo-material related engineering and science disciplines. The Journal provides an international forum for the exchange of innovative ideas, especially between researchers in Asia and the rest of the world.