Experimental Research for the Application of Mining Waste in the Trench Cutting Remixing Deep Wall Method
This paper focuses on the use of fly ash (FA) or ground granulated blast slag (GGBS) and reactive lime blends for cement-stabilized Nanjing clay, comparing them with Portland cement (PC) for enhanced technical performance. A range of tests were conducted to investigate the properties of stabilized s...
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2015-01-01
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Series: | Advances in Materials Science and Engineering |
Online Access: | http://dx.doi.org/10.1155/2015/202848 |
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doaj-509912805edc4625ae53d24a9d3f7d0d2020-11-25T00:37:06ZengHindawi LimitedAdvances in Materials Science and Engineering1687-84341687-84422015-01-01201510.1155/2015/202848202848Experimental Research for the Application of Mining Waste in the Trench Cutting Remixing Deep Wall MethodYan Chao0Liu Songyu1Deng Yongfeng2Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, ChinaInstitute of Geotechnical Engineering, Southeast University, Nanjing 210096, ChinaInstitute of Geotechnical Engineering, Southeast University, Nanjing 210096, ChinaThis paper focuses on the use of fly ash (FA) or ground granulated blast slag (GGBS) and reactive lime blends for cement-stabilized Nanjing clay, comparing them with Portland cement (PC) for enhanced technical performance. A range of tests were conducted to investigate the properties of stabilized soils, including macrostrength (UCS), permeability, and microstructure analyses by scanning electron microscopy (SEM). The influence of PC : (FA + lime) ratio, PC : (GGBS + lime) ratio and curing time was addressed. The UCS and permeability results revealed that PC-FA-lime was more efficient than PC-GGBS-lime as a binder for soil stabilization, with an optimum proportion of PC : (FA + lime) = 3 : 7 at 25% binder content, varying with curing time. The microstructure analysis reveals that fly ash mainly changes the pore volume distribution, which ranges between 0.01 μm and 1 μm, and produces more CSH/CASH bonding and fissures due to the secondary hydration and pozzolanic reactions. Based on the favourable results obtained, it can be concluded that the soft soils can be successfully stabilized by the combined action of cement, fly ash, and lime. Since fly ash is much cheaper than cement, the addition of fly ash and lime in cement-soil mix may particularly become attractive and can result in cost reduction of construction.http://dx.doi.org/10.1155/2015/202848 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yan Chao Liu Songyu Deng Yongfeng |
spellingShingle |
Yan Chao Liu Songyu Deng Yongfeng Experimental Research for the Application of Mining Waste in the Trench Cutting Remixing Deep Wall Method Advances in Materials Science and Engineering |
author_facet |
Yan Chao Liu Songyu Deng Yongfeng |
author_sort |
Yan Chao |
title |
Experimental Research for the Application of Mining Waste in the Trench Cutting Remixing Deep Wall Method |
title_short |
Experimental Research for the Application of Mining Waste in the Trench Cutting Remixing Deep Wall Method |
title_full |
Experimental Research for the Application of Mining Waste in the Trench Cutting Remixing Deep Wall Method |
title_fullStr |
Experimental Research for the Application of Mining Waste in the Trench Cutting Remixing Deep Wall Method |
title_full_unstemmed |
Experimental Research for the Application of Mining Waste in the Trench Cutting Remixing Deep Wall Method |
title_sort |
experimental research for the application of mining waste in the trench cutting remixing deep wall method |
publisher |
Hindawi Limited |
series |
Advances in Materials Science and Engineering |
issn |
1687-8434 1687-8442 |
publishDate |
2015-01-01 |
description |
This paper focuses on the use of fly ash (FA) or ground granulated blast slag (GGBS) and reactive lime blends for cement-stabilized Nanjing clay, comparing them with Portland cement (PC) for enhanced technical performance. A range of tests were conducted to investigate the properties of stabilized soils, including macrostrength (UCS), permeability, and microstructure analyses by scanning electron microscopy (SEM). The influence of PC : (FA + lime) ratio, PC : (GGBS + lime) ratio and curing time was addressed. The UCS and permeability results revealed that PC-FA-lime was more efficient than PC-GGBS-lime as a binder for soil stabilization, with an optimum proportion of PC : (FA + lime) = 3 : 7 at 25% binder content, varying with curing time. The microstructure analysis reveals that fly ash mainly changes the pore volume distribution, which ranges between 0.01 μm and 1 μm, and produces more CSH/CASH bonding and fissures due to the secondary hydration and pozzolanic reactions. Based on the favourable results obtained, it can be concluded that the soft soils can be successfully stabilized by the combined action of cement, fly ash, and lime. Since fly ash is much cheaper than cement, the addition of fly ash and lime in cement-soil mix may particularly become attractive and can result in cost reduction of construction. |
url |
http://dx.doi.org/10.1155/2015/202848 |
work_keys_str_mv |
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