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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: Universiti Malaysia Sarawak, (UNIMAS) 2014
Subjects:
GE Environmental Sciences
TA Engineering (General). Civil engineering (General)
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
http://ir.unimas.my/id/eprint/9306/
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spelling my.unimas.ir.93062023-05-24T03:11:25Z http://ir.unimas.my/id/eprint/9306/ Durability effect on stabilized subgrade soil 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 NonPeerReviewed text en http://ir.unimas.my/id/eprint/9306/1/Durability%20Effect%20on%20Stabilized%20Subgrade%20Soil%2824pages%29.pdf text en http://ir.unimas.my/id/eprint/9306/8/Noraida%20%20Razali%20ft.pdf Noraida, binti Razali (2014) Durability effect on stabilized subgrade soil. Masters thesis, Universiti Malaysia Sarawak, (UNIMAS).
institution Universiti Malaysia Sarawak
building Centre for Academic Information Services (CAIS)
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sarawak
content_source UNIMAS Institutional Repository
url_provider http://ir.unimas.my/
language English
English
topic GE Environmental Sciences
TA Engineering (General). Civil engineering (General)
spellingShingle GE Environmental Sciences
TA Engineering (General). Civil engineering (General)
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
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
publisher Universiti Malaysia Sarawak, (UNIMAS)
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
http://ir.unimas.my/id/eprint/9306/
_version_ 1767209795082780672
score 13.211869

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