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Effect of cement stabilized peat on strength, microstructure, and chemical analysis

Adding Ordinary Portland Cement (OPC) to alter peat properties has been established in some research, but its mechanism in strength gain is less studied. Therefore, understanding on the strength gain and chemical effect in cement stabilized peat is essential to be further investigated. An extensiv...

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Main Authors: Wahab, Norhaliza, Abu Talib, Mohd Khaidir, Abd Malik, Ahmad Khairul, Madun, Aziman
Format: Article
Language:English
Published: Elsevier 2023
Subjects:
TP Chemical technology
Online Access:http://eprints.uthm.edu.my/9745/1/J15706_7cfe2355efda970cbf8bb4791f260289.pdf
http://eprints.uthm.edu.my/9745/
https://doi.org/10.1016/j.pce.2022.103348
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spelling my.uthm.eprints.97452023-09-13T03:44:55Z http://eprints.uthm.edu.my/9745/ Effect of cement stabilized peat on strength, microstructure, and chemical analysis Wahab, Norhaliza Abu Talib, Mohd Khaidir Abd Malik, Ahmad Khairul Madun, Aziman TP Chemical technology Adding Ordinary Portland Cement (OPC) to alter peat properties has been established in some research, but its mechanism in strength gain is less studied. Therefore, understanding on the strength gain and chemical effect in cement stabilized peat is essential to be further investigated. An extensive laboratory tests were performed to correlate the strength performance with chemical compound and soil structure behaviour after stabilization. Three types of peat which is fibric (PF), hemic (PH) and sapric (PS) were stabilized with various cement dosage of 300–500 kg/m3 at 7 and 28 days. The stabilized peats strength was observed via the Unconfined Compressive Strength (qu) test with the target strength 50 kPa. The X-ray Diffraction (XRD) and Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS) were conducted to verify morphological formation and chemical compounds during stabilization. The results showed the optimum cement dosage 300, 400, and 500 kg/ m3 for fibric, hemic, and sapric peat was sufficient to achieve the target strength of 73.69, 53.48, and 59.37 kPa at 28 days, respectively. For comparison, fibric and hemic peat had higher strength than sapric peat, simultaneously with the increasing of cement dosage and curing period, which could be affected by the degree of decomposition. Finally, the strength of stabilized peat increased with an increase in cement dosage and curing days. In contrast, the carbon significantly reduced, and calcium oxide increased with the formation of cementitious products such as Calcium Silicate Hydrate (CSH). Thus, cement is a good binder to improve peat properties through strength and chemical analysis results Elsevier 2023 Article PeerReviewed text en http://eprints.uthm.edu.my/9745/1/J15706_7cfe2355efda970cbf8bb4791f260289.pdf Wahab, Norhaliza and Abu Talib, Mohd Khaidir and Abd Malik, Ahmad Khairul and Madun, Aziman (2023) Effect of cement stabilized peat on strength, microstructure, and chemical analysis. Physics and Chemistry of the Earth, 129. pp. 1-8. https://doi.org/10.1016/j.pce.2022.103348
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Wahab, Norhaliza
Abu Talib, Mohd Khaidir
Abd Malik, Ahmad Khairul
Madun, Aziman
Effect of cement stabilized peat on strength, microstructure, and chemical analysis
description Adding Ordinary Portland Cement (OPC) to alter peat properties has been established in some research, but its mechanism in strength gain is less studied. Therefore, understanding on the strength gain and chemical effect in cement stabilized peat is essential to be further investigated. An extensive laboratory tests were performed to correlate the strength performance with chemical compound and soil structure behaviour after stabilization. Three types of peat which is fibric (PF), hemic (PH) and sapric (PS) were stabilized with various cement dosage of 300–500 kg/m3 at 7 and 28 days. The stabilized peats strength was observed via the Unconfined Compressive Strength (qu) test with the target strength 50 kPa. The X-ray Diffraction (XRD) and Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS) were conducted to verify morphological formation and chemical compounds during stabilization. The results showed the optimum cement dosage 300, 400, and 500 kg/ m3 for fibric, hemic, and sapric peat was sufficient to achieve the target strength of 73.69, 53.48, and 59.37 kPa at 28 days, respectively. For comparison, fibric and hemic peat had higher strength than sapric peat, simultaneously with the increasing of cement dosage and curing period, which could be affected by the degree of decomposition. Finally, the strength of stabilized peat increased with an increase in cement dosage and curing days. In contrast, the carbon significantly reduced, and calcium oxide increased with the formation of cementitious products such as Calcium Silicate Hydrate (CSH). Thus, cement is a good binder to improve peat properties through strength and chemical analysis results
format Article
author Wahab, Norhaliza
Abu Talib, Mohd Khaidir
Abd Malik, Ahmad Khairul
Madun, Aziman
author_facet Wahab, Norhaliza
Abu Talib, Mohd Khaidir
Abd Malik, Ahmad Khairul
Madun, Aziman
author_sort Wahab, Norhaliza
title Effect of cement stabilized peat on strength, microstructure, and chemical analysis
title_short Effect of cement stabilized peat on strength, microstructure, and chemical analysis
title_full Effect of cement stabilized peat on strength, microstructure, and chemical analysis
title_fullStr Effect of cement stabilized peat on strength, microstructure, and chemical analysis
title_full_unstemmed Effect of cement stabilized peat on strength, microstructure, and chemical analysis
title_sort effect of cement stabilized peat on strength, microstructure, and chemical analysis
publisher Elsevier
publishDate 2023
url http://eprints.uthm.edu.my/9745/1/J15706_7cfe2355efda970cbf8bb4791f260289.pdf
http://eprints.uthm.edu.my/9745/
https://doi.org/10.1016/j.pce.2022.103348
_version_ 1778164189004562432
score 13.211869

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