Modification of soft soils with ground granulated blast furnace slags with activated magnesium oxide

Increased environmental consciousness have led to the replacement of cement in soil improvement with ground granulated blast furnace slag (GGBS). Reactive magnesia (MgO) has been found to be effective in activating GGBS and when incorporated into soils, showing superior qualities when compared to so...

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Main Author: Kwek, Kathryn Kai Yun
Other Authors: Teh Cee Ing
Format: Final Year Project
Language:English
Published: 2016
Subjects:
Online Access:http://hdl.handle.net/10356/68966
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-689662023-03-03T17:27:02Z Modification of soft soils with ground granulated blast furnace slags with activated magnesium oxide Kwek, Kathryn Kai Yun Teh Cee Ing School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering Increased environmental consciousness have led to the replacement of cement in soil improvement with ground granulated blast furnace slag (GGBS). Reactive magnesia (MgO) has been found to be effective in activating GGBS and when incorporated into soils, showing superior qualities when compared to soil stabilised with PC, lime and lime activated GGBS. However, MgO activated GGBS (MgO-GGBS) is a novel binder and in most studies, are tested using sand specimens compacted by hand ramming. Hence, the aim of this study is to investigate the effect of MgO-GGBS on a soft soil prepared by static compaction. Kaolin was treated with varying amounts of MgO-GGBS and the strengths of the specimens were determined by the unconfined compression test. The results indicated that an increased binder content in the clay mixes led to higher strengths while increased MgO contents accelerated the hydration process to achieve high early strength. It was also observed that the optimum MgO to binder content ratio for achieving the highest strength is between 10% − 20%. The results indicated that for GGBS-MgO kaolin a 28-day strength of at least 2 MPa can be achieved for binder contents between 10% and 40%. Blue colouration was also found to be present in specimens cured with more moisture and with higher binder contents at early ages. Bachelor of Engineering (Civil) 2016-08-18T07:17:52Z 2016-08-18T07:17:52Z 2016 Final Year Project (FYP) http://hdl.handle.net/10356/68966 en Nanyang Technological University 114 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Civil engineering
spellingShingle DRNTU::Engineering::Civil engineering
Kwek, Kathryn Kai Yun
Modification of soft soils with ground granulated blast furnace slags with activated magnesium oxide
description Increased environmental consciousness have led to the replacement of cement in soil improvement with ground granulated blast furnace slag (GGBS). Reactive magnesia (MgO) has been found to be effective in activating GGBS and when incorporated into soils, showing superior qualities when compared to soil stabilised with PC, lime and lime activated GGBS. However, MgO activated GGBS (MgO-GGBS) is a novel binder and in most studies, are tested using sand specimens compacted by hand ramming. Hence, the aim of this study is to investigate the effect of MgO-GGBS on a soft soil prepared by static compaction. Kaolin was treated with varying amounts of MgO-GGBS and the strengths of the specimens were determined by the unconfined compression test. The results indicated that an increased binder content in the clay mixes led to higher strengths while increased MgO contents accelerated the hydration process to achieve high early strength. It was also observed that the optimum MgO to binder content ratio for achieving the highest strength is between 10% − 20%. The results indicated that for GGBS-MgO kaolin a 28-day strength of at least 2 MPa can be achieved for binder contents between 10% and 40%. Blue colouration was also found to be present in specimens cured with more moisture and with higher binder contents at early ages.
author2 Teh Cee Ing
author_facet Teh Cee Ing
Kwek, Kathryn Kai Yun
format Final Year Project
author Kwek, Kathryn Kai Yun
author_sort Kwek, Kathryn Kai Yun
title Modification of soft soils with ground granulated blast furnace slags with activated magnesium oxide
title_short Modification of soft soils with ground granulated blast furnace slags with activated magnesium oxide
title_full Modification of soft soils with ground granulated blast furnace slags with activated magnesium oxide
title_fullStr Modification of soft soils with ground granulated blast furnace slags with activated magnesium oxide
title_full_unstemmed Modification of soft soils with ground granulated blast furnace slags with activated magnesium oxide
title_sort modification of soft soils with ground granulated blast furnace slags with activated magnesium oxide
publishDate 2016
url http://hdl.handle.net/10356/68966
_version_ 1759857970102927360