Durability effect on stabilized subgrade soil

Soft clay soil can be categorized as a problematic soil as it has the low strength and high compressibility characteristics. In any highway construction on a soft clay soil, sub-grade soil stabilization is one of the important processes. Therefore, a careful design analysis should be taken for th...

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Main Author:	Noraida, binti Razali
Format:	Thesis
Language:	English English
Published:	2014
Subjects:	GE Environmental Sciences
Online Access:	http://ir.unimas.my/id/eprint/9306/1/Durability%20Effect%20on%20Stabilized%20Subgrade%20Soil%2824pages%29.pdf http://ir.unimas.my/id/eprint/9306/8/Noraida%20%20Razali%20ft.pdf
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spelling	my-unimas-ir.93062023-05-24T03:11:25Z Durability effect on stabilized subgrade soil 2014 Noraida, binti Razali GE Environmental Sciences TA Engineering (General). Civil engineering (General) Soft clay soil can be categorized as a problematic soil as it has the low strength and high compressibility characteristics. In any highway construction on a soft clay soil, sub-grade soil stabilization is one of the important processes. Therefore, a careful design analysis should be taken for the purposes of any structure built on it. In Sarawak, problematic soils, namely peat, silt and soft clay are the major concern which is inadequate for sub-grade used in the construction of a pavement structure. The focus of this study was mainly the strength and durability of the silty clayey soil. The samples were collected from Kota Samarahan, Sarawak and admixed with cement, fly ash and rubberchip as an additive. The optimum mixture determine from the laboratory is then used as a recommendation for design guideline of sub-grade based on JKR Standard Specification for Road Works and the calculation are performed by using MathCad software. In this study, the stabilized clay specimens were prepared with 5% cement and various fly ash and rubber chips contents, of 5%, 10% and 15%, respectively. The specimens were cured for 7 and 28 days before subjected to Unconfined Compressive Strength (UCS) tests and California Bearing Ratio (CBR) tests. As observed, the stabilization improved the strength and stiffness of the soil properties significantly. However, the addition of 15% rubberchip shows a reduction in strength for both 7 and 28 days curing period. The optimum mixture which fulfilled the JKR Standard Specification was the mixture of 5% cement and 15% fly ash where the value of CBR is 82.6% while the UCS value is 941.69 kPa. However, the mixture of 5% cement and 10% rubberchip can also be used as an alternative to stabilize the sub-grade for low volume road as the CBR value is higher than 30% CBR required by JKR which is 64.66% while the UCS value was 771.77 kPa, respectively. Universiti Malaysia Sarawak, (UNIMAS) 2014 Thesis http://ir.unimas.my/id/eprint/9306/ http://ir.unimas.my/id/eprint/9306/1/Durability%20Effect%20on%20Stabilized%20Subgrade%20Soil%2824pages%29.pdf text en public http://ir.unimas.my/id/eprint/9306/8/Noraida%20%20Razali%20ft.pdf text en validuser masters Universiti Malaysia Sarawak, (UNIMAS) Faculty of Engineering.
institution	Universiti Malaysia Sarawak
collection	UNIMAS Institutional Repository
language	English English
topic	GE Environmental Sciences GE Environmental Sciences
spellingShingle	GE Environmental Sciences GE Environmental Sciences Noraida, binti Razali Durability effect on stabilized subgrade soil
description	Soft clay soil can be categorized as a problematic soil as it has the low strength and high compressibility characteristics. In any highway construction on a soft clay soil, sub-grade soil stabilization is one of the important processes. Therefore, a careful design analysis should be taken for the purposes of any structure built on it. In Sarawak, problematic soils, namely peat, silt and soft clay are the major concern which is inadequate for sub-grade used in the construction of a pavement structure. The focus of this study was mainly the strength and durability of the silty clayey soil. The samples were collected from Kota Samarahan, Sarawak and admixed with cement, fly ash and rubberchip as an additive. The optimum mixture determine from the laboratory is then used as a recommendation for design guideline of sub-grade based on JKR Standard Specification for Road Works and the calculation are performed by using MathCad software. In this study, the stabilized clay specimens were prepared with 5% cement and various fly ash and rubber chips contents, of 5%, 10% and 15%, respectively. The specimens were cured for 7 and 28 days before subjected to Unconfined Compressive Strength (UCS) tests and California Bearing Ratio (CBR) tests. As observed, the stabilization improved the strength and stiffness of the soil properties significantly. However, the addition of 15% rubberchip shows a reduction in strength for both 7 and 28 days curing period. The optimum mixture which fulfilled the JKR Standard Specification was the mixture of 5% cement and 15% fly ash where the value of CBR is 82.6% while the UCS value is 941.69 kPa. However, the mixture of 5% cement and 10% rubberchip can also be used as an alternative to stabilize the sub-grade for low volume road as the CBR value is higher than 30% CBR required by JKR which is 64.66% while the UCS value was 771.77 kPa, respectively.
format	Thesis
qualification_level	Master's degree
author	Noraida, binti Razali
author_facet	Noraida, binti Razali
author_sort	Noraida, binti Razali
title	Durability effect on stabilized subgrade soil
title_short	Durability effect on stabilized subgrade soil
title_full	Durability effect on stabilized subgrade soil
title_fullStr	Durability effect on stabilized subgrade soil
title_full_unstemmed	Durability effect on stabilized subgrade soil
title_sort	durability effect on stabilized subgrade soil
granting_institution	Universiti Malaysia Sarawak, (UNIMAS)
granting_department	Faculty of Engineering.
publishDate	2014
url	http://ir.unimas.my/id/eprint/9306/1/Durability%20Effect%20on%20Stabilized%20Subgrade%20Soil%2824pages%29.pdf http://ir.unimas.my/id/eprint/9306/8/Noraida%20%20Razali%20ft.pdf
_version_	1783728045013598208

Durability effect on stabilized subgrade soil

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