California bearing ratio tests of enzyme-treated sedimentary residual soil show no improvement

Environmental concerns have significantly influenced the construction industry regarding the identification and use of environmentally sustainable construction materials. In this context, enzymes (organic materials) have been introduced recently for ground improvement projects such as pavements and...

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Main Authors:	Khan, Tanveer Ahmed, Mohd. Raihan Taha, Firoozi, Ali Asghar, Firoozi, Ali Akbar
Format:	Article
Language:	English
Published:	Penerbit Universiti Kebangsaan Malaysia 2017
Online Access:	http://journalarticle.ukm.my/11145/ http://journalarticle.ukm.my/11145/ http://journalarticle.ukm.my/11145/1/11%20Tanveer%20Ahmed%20Khan.pdf

id	ukm-11145
recordtype	eprints
spelling	ukm-111452017-12-22T08:40:41Z http://journalarticle.ukm.my/11145/ California bearing ratio tests of enzyme-treated sedimentary residual soil show no improvement Khan, Tanveer Ahmed Mohd. Raihan Taha, Firoozi, Ali Asghar Firoozi, Ali Akbar Environmental concerns have significantly influenced the construction industry regarding the identification and use of environmentally sustainable construction materials. In this context, enzymes (organic materials) have been introduced recently for ground improvement projects such as pavements and embankments. The present experimental study was carried out in order to evaluate the compressive strength of a sedimentary residual soil treated with three different types of enzymes, as assessed through a California bearing ratio (CBR) test. Controlled untreated and treated soil samples containing four dosages (the recommended dose and two, five and 10 times the recommended dose) were prepared, sealed and cured for four months. Following the curing period, samples were soaked in water for four days before the CBR tests were administered. These tests showed no improvement in the soil is compressive strength; in other words, samples prepared even at higher dosages did not exhibit any improvement. Nuclear magnetic resonance (NMR) spectroscopy tests were carried out on three enzymes in order to study the functional groups present in them. Furthermore, X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) tests were executed for untreated and treated soil samples to determine if any chemical reaction took place between the soil and the enzymes. Neither of the tests (XRD nor FESEM) revealed any change. In fact, the XRD patterns and FESEM images for untreated and treated soil samples were indistinguishable. Penerbit Universiti Kebangsaan Malaysia 2017-08 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/11145/1/11%20Tanveer%20Ahmed%20Khan.pdf Khan, Tanveer Ahmed and Mohd. Raihan Taha, and Firoozi, Ali Asghar and Firoozi, Ali Akbar (2017) California bearing ratio tests of enzyme-treated sedimentary residual soil show no improvement. Sains Malaysiana, 46 (8). pp. 1259-1267. ISSN 0126-6039 http://www.ukm.my/jsm/malay_journals/jilid46bil8_2017/KandunganJilid46Bil8_2017.html
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	Environmental concerns have significantly influenced the construction industry regarding the identification and use of environmentally sustainable construction materials. In this context, enzymes (organic materials) have been introduced recently for ground improvement projects such as pavements and embankments. The present experimental study was carried out in order to evaluate the compressive strength of a sedimentary residual soil treated with three different types of enzymes, as assessed through a California bearing ratio (CBR) test. Controlled untreated and treated soil samples containing four dosages (the recommended dose and two, five and 10 times the recommended dose) were prepared, sealed and cured for four months. Following the curing period, samples were soaked in water for four days before the CBR tests were administered. These tests showed no improvement in the soil is compressive strength; in other words, samples prepared even at higher dosages did not exhibit any improvement. Nuclear magnetic resonance (NMR) spectroscopy tests were carried out on three enzymes in order to study the functional groups present in them. Furthermore, X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) tests were executed for untreated and treated soil samples to determine if any chemical reaction took place between the soil and the enzymes. Neither of the tests (XRD nor FESEM) revealed any change. In fact, the XRD patterns and FESEM images for untreated and treated soil samples were indistinguishable.
format	Article
author	Khan, Tanveer Ahmed Mohd. Raihan Taha, Firoozi, Ali Asghar Firoozi, Ali Akbar
spellingShingle	Khan, Tanveer Ahmed Mohd. Raihan Taha, Firoozi, Ali Asghar Firoozi, Ali Akbar California bearing ratio tests of enzyme-treated sedimentary residual soil show no improvement
author_facet	Khan, Tanveer Ahmed Mohd. Raihan Taha, Firoozi, Ali Asghar Firoozi, Ali Akbar
author_sort	Khan, Tanveer Ahmed
title	California bearing ratio tests of enzyme-treated sedimentary residual soil show no improvement
title_short	California bearing ratio tests of enzyme-treated sedimentary residual soil show no improvement
title_full	California bearing ratio tests of enzyme-treated sedimentary residual soil show no improvement
title_fullStr	California bearing ratio tests of enzyme-treated sedimentary residual soil show no improvement
title_full_unstemmed	California bearing ratio tests of enzyme-treated sedimentary residual soil show no improvement
title_sort	california bearing ratio tests of enzyme-treated sedimentary residual soil show no improvement
publisher	Penerbit Universiti Kebangsaan Malaysia
publishDate	2017
url	http://journalarticle.ukm.my/11145/ http://journalarticle.ukm.my/11145/ http://journalarticle.ukm.my/11145/1/11%20Tanveer%20Ahmed%20Khan.pdf
first_indexed	2023-09-18T19:59:29Z
last_indexed	2023-09-18T19:59:29Z
_version_	1777406752807976960

California bearing ratio tests of enzyme-treated sedimentary residual soil show no improvement

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