Investigation of bottom ash as a partial replacement to conventional subbase soils

Thet Htet Ye Htun, Parnthep Julnipitawong, Weeraya Chimoye, Somnuk Tangtermsirikul
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引用次数: 1

Abstract

This study evaluates the potential use of bottom ash (BA) in the subbase layer of pavements. Lateritic soil, a conventional subbase soil, was mixed with 0–60% of BA, and their properties were studied. The lateritic soil was sieved into grade B and grade D soils. Each grade of soil is mixed with BA at varying content and their bearing capacity and permeability properties were tested. The California bearing ratio (CBR) samples were compacted at optimum water content (OWC) and OWC + 2%. At OWC, both grades of soil showed a high CBR when 30–60% BA was mixed. However, when the samples were compacted at OWC + 2%, CBR values reduced drastically and only a few mixtures passed the minimum CBR requirement for subbases by the Department of Highway, Thailand. To explain the mechanism behind the CBR trends, the gradation of the mixtures before and after CBR was checked and interaction compaction effects were observed. This phenomenon was further proved by the results of permeability.
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底灰部分替代常规底基土的研究
本研究评价了底灰(BA)在路面亚基层中的潜在用途。以红土土为基土,掺入0 ~ 60% BA,对其性质进行了研究。红土分为B级和D级土。在不同等级的土中掺入不同含量的BA,测试其承载力和渗透性能。在最佳含水率(OWC)和OWC + 2%的条件下对CBR样品进行了压实。在最低含水率下,30 ~ 60% BA混合时,两级土壤的CBR均较高。然而,当样品在OWC + 2%压实时,CBR值急剧下降,只有少数混合物通过了泰国公路部门对基层的最低CBR要求。为了解释CBR趋势背后的机制,检查了CBR前后混合物的级配,并观察了相互作用的压实效果。渗透率的结果进一步证明了这一现象。
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来源期刊
CiteScore
3.10
自引率
8.30%
发文量
54
期刊介绍: Ground Improvement provides a fast-track vehicle for the dissemination of news in technological developments, feasibility studies and innovative engineering applications for all aspects of ground improvement, ground reinforcement and grouting. The journal publishes high-quality, practical papers relevant to engineers, specialist contractors and academics involved in the development, design, construction, monitoring and quality control aspects of ground improvement. It covers a wide range of civil and environmental engineering applications, including analytical advances, performance evaluations, pilot and model studies, instrumented case-histories and innovative applications of existing technology.
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