{"title":"Geotechnical properties of peat soil stabilised with shredded waste tyre chips","authors":"M. Rahgozar, M. Saberian","doi":"10.19189/MAP.2015.OMB.205","DOIUrl":null,"url":null,"abstract":"To accommodate major civil engineering projects in or in the vicinity of peatlands, it is essential to stabilise peat deposits. On the other hand, the accumulation of waste tyres in recent decades has caused environmental problems around the world. An effective remedy for both issues is to use scrap tyre material to stabilise problematic peat soils. This article reports an experimental investigation of the effects of adding shredded tyre chips on the stability and bearing capacity of peat soil. Peat soil samples from the Chaghakhor Wetland (Chaharmahal and Bakhtiari Province, Iran) were mixed with sand at a constant dosage of 400 kg m-3 and different percentages (0 %, 5 %, 10 %, 15 % and 20 % by weight) of shredded tyre chips. The unconfined compressive strength, effective cohesion, angle of internal friction and coefficient of permeability were measured for all of these mixtures. The results showed that adding shredded tyre chips significantly improved the geotechnical properties of the peat soil. The mixture with 10 % shredded tyre chips showed the highest unconfined compressive strength; the one with 15 % tyre chips exhibited the highest ductility; and adding 20 % shredded tyre chips provided the highest values for angle of internal friction, effective cohesion and coefficient of permeability. Scanning Electron Micrographs (SEM) showed that the pore spaces in the stabilised peat were mostly filled with sand.","PeriodicalId":48721,"journal":{"name":"Mires and Peat","volume":"18 1","pages":"1-12"},"PeriodicalIF":1.5000,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"84","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mires and Peat","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.19189/MAP.2015.OMB.205","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 84
Abstract
To accommodate major civil engineering projects in or in the vicinity of peatlands, it is essential to stabilise peat deposits. On the other hand, the accumulation of waste tyres in recent decades has caused environmental problems around the world. An effective remedy for both issues is to use scrap tyre material to stabilise problematic peat soils. This article reports an experimental investigation of the effects of adding shredded tyre chips on the stability and bearing capacity of peat soil. Peat soil samples from the Chaghakhor Wetland (Chaharmahal and Bakhtiari Province, Iran) were mixed with sand at a constant dosage of 400 kg m-3 and different percentages (0 %, 5 %, 10 %, 15 % and 20 % by weight) of shredded tyre chips. The unconfined compressive strength, effective cohesion, angle of internal friction and coefficient of permeability were measured for all of these mixtures. The results showed that adding shredded tyre chips significantly improved the geotechnical properties of the peat soil. The mixture with 10 % shredded tyre chips showed the highest unconfined compressive strength; the one with 15 % tyre chips exhibited the highest ductility; and adding 20 % shredded tyre chips provided the highest values for angle of internal friction, effective cohesion and coefficient of permeability. Scanning Electron Micrographs (SEM) showed that the pore spaces in the stabilised peat were mostly filled with sand.
为了在泥炭地或其附近进行大型土木工程项目，必须稳定泥炭沉积物。另一方面，近几十年来，废旧轮胎的积累在世界各地造成了环境问题。解决这两个问题的有效方法是使用废旧轮胎材料来稳定有问题的泥炭土。本文报道了在泥炭土中加入轮胎碎屑对泥炭土稳定性和承载力影响的试验研究。从Chaghakhor湿地(伊朗Chaharmahal和Bakhtiari省)提取泥炭土样本，以400 kg m-3的恒定剂量与不同比例(按重量计为0%、5%、10%、15%和20%)的沙子混合。测试了所有混合料的无侧限抗压强度、有效黏聚力、内摩擦角和渗透系数。结果表明，轮胎碎屑的加入显著改善了泥炭土的岩土力学性能。掺10%轮胎碎料的混合料无侧限抗压强度最高;轮胎屑含量为15%时，其延展性最高;添加20%的轮胎碎屑，内摩擦角、有效黏聚力和透气性系数均达到最大值。扫描电镜(SEM)显示，稳定泥炭的孔隙空间主要被砂土填充。
期刊介绍：
Mires and Peat is a peer-reviewed internet journal focusing specifically on mires, peatlands and peat. As a truly “free-to-users” publication (i.e. NO CHARGES to authors OR readers), it is immediately accessible to readers and potential authors worldwide. It is published jointly by the International Peatland Society (IPS) and the International Mire Conservation Group (IMCG).
Mires and Peat is indexed by Thomson Reuters Web of Science (2017 Impact Factors: 1.326 [two-year] and 1.638 [five-year]), Elsevier Scopus, EBSCO Environment Complete, CABI Abstracts, CSA Proquest (including their Aquatic Science and Fisheries Abstracts ASFA, Ecology, Entomology, Animal Behavior, Aqualine and Pollution databases) and Directory of Open Access Journals (DOAJ). Mires and Peat also participates in the CABI Full Text Repository, and subscribes to the Portico E-journal Preservation Service (LTPA).
Mires and Peat publishes high-quality research papers on all aspects of peatland science, technology and wise use, including:
ecology, hydrology, survey, inventory, classification, functions and values of mires and peatlands;
scientific, economic and human aspects of the management of peatlands for agriculture, forestry, nature conservation, environmental protection, peat extraction, industrial development and other purposes;
biological, physical and chemical characteristics of peat; and
climate change and peatlands.
Short communications and review articles on these and related topics will also be considered; and suggestions for special issues of the Journal based on the proceedings of conferences, seminars, symposia and workshops will be welcomed. The submission of material by authors and from countries whose work would otherwise be inaccessible to the international community is particularly encouraged.
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