Thet Htet Ye Htun, Parnthep Julnipitawong, Weeraya Chimoye, Somnuk Tangtermsirikul
{"title":"Investigation of bottom ash as a partial replacement to conventional subbase soils","authors":"Thet Htet Ye Htun, Parnthep Julnipitawong, Weeraya Chimoye, Somnuk Tangtermsirikul","doi":"10.1680/jgrim.21.00038","DOIUrl":null,"url":null,"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.","PeriodicalId":51705,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Ground Improvement","volume":"5 1","pages":"0"},"PeriodicalIF":1.3000,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the Institution of Civil Engineers-Ground Improvement","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1680/jgrim.21.00038","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}
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.
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.