Physicochemical properties and pozzolanic performance of ultrafine treated rice husk ash (uftrha) as additive in concrete

Rice husk ash (RHA) contains high amount of amorphous silica that is ubiquitous in the pozzolanic reaction of SCM in concrete. However, usage of conventional RHA is currently unfavourable in concrete industry due to its properties inconsistency. In this regard, improvement on the RHA properties b...

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Main Authors:	Saad, Siti Asmahani, Shafiq, Nasir, Ali, Maisarah
Format:	Article
Language:	English English
Published:	Malaysian Institute of Planners 2018
Subjects:	TA401 Materials of engineering and construction
Online Access:	http://irep.iium.edu.my/69032/ http://irep.iium.edu.my/69032/ http://irep.iium.edu.my/69032/1/Paper_Asmahani_2018_MIP.pdf http://irep.iium.edu.my/69032/9/69032_Physicochemical%20properties%20and%20pozzolanic_scopus.pdf

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recordtype	eprints
spelling	iium-690322019-01-09T08:26:15Z http://irep.iium.edu.my/69032/ Physicochemical properties and pozzolanic performance of ultrafine treated rice husk ash (uftrha) as additive in concrete Saad, Siti Asmahani Shafiq, Nasir Ali, Maisarah TA401 Materials of engineering and construction Rice husk ash (RHA) contains high amount of amorphous silica that is ubiquitous in the pozzolanic reaction of SCM in concrete. However, usage of conventional RHA is currently unfavourable in concrete industry due to its properties inconsistency. In this regard, improvement on the RHA properties by introduction of thermochemical pre-treatment prior to burning procedure is seen as an excellent way to reach the goal. In this paper, raw rice husk was pre-treated using 0.1N hydrochloric acid (HCl) and heated at 80oC. It was then mechanically activated by high energy planetary ball mill for 15 minutes at speed of 300rpm and ball-to-powder ratio (BPR) of 15:1. The chemical composition, mineralogical properties, particle size analysis, specific surface area as well as microstructure properties of ultrafine treated rice husk ash (UFTRHA) were determined accordingly. As for amorphous silica content of the optimum sample was recorded as 98.60% incinerated at 600oC with four hours of pre-treatment soaking duration. In terms of particle size and specific surface, it was also observed that, burning temperature of 600oC, pre-treated at four hours were recorded to produce finest size of UFTRHA where d(0.1), d(0.5) and d(0.9) were obtained as 1.416 μm, 4.364 μm and 14.043 μm respectively. Largest specific surface area value was obtained at 219.58 m2/g with the similar pre-treatment conditions. Meanwhile, the strength activity of UFTRHA from the optimum pre-treatment process was measured by testing the compressive strength of mortars. The highest compression value obtained was 50.17MPa with 3% UFTRHA replacement at 28 days. Malaysian Institute of Planners 2018 Article PeerReviewed application/pdf en http://irep.iium.edu.my/69032/1/Paper_Asmahani_2018_MIP.pdf application/pdf en http://irep.iium.edu.my/69032/9/69032_Physicochemical%20properties%20and%20pozzolanic_scopus.pdf Saad, Siti Asmahani and Shafiq, Nasir and Ali, Maisarah (2018) Physicochemical properties and pozzolanic performance of ultrafine treated rice husk ash (uftrha) as additive in concrete. Planning Malaysia : Journal of the Malaysian Institute of Planners, 16 (2). pp. 285-292. ISSN 1675-6215 E-ISSN 0128-0945 http://www.planningmalaysia.org/index.php/pmj/article/view/483/393
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	TA401 Materials of engineering and construction
spellingShingle	TA401 Materials of engineering and construction Saad, Siti Asmahani Shafiq, Nasir Ali, Maisarah Physicochemical properties and pozzolanic performance of ultrafine treated rice husk ash (uftrha) as additive in concrete
description	Rice husk ash (RHA) contains high amount of amorphous silica that is ubiquitous in the pozzolanic reaction of SCM in concrete. However, usage of conventional RHA is currently unfavourable in concrete industry due to its properties inconsistency. In this regard, improvement on the RHA properties by introduction of thermochemical pre-treatment prior to burning procedure is seen as an excellent way to reach the goal. In this paper, raw rice husk was pre-treated using 0.1N hydrochloric acid (HCl) and heated at 80oC. It was then mechanically activated by high energy planetary ball mill for 15 minutes at speed of 300rpm and ball-to-powder ratio (BPR) of 15:1. The chemical composition, mineralogical properties, particle size analysis, specific surface area as well as microstructure properties of ultrafine treated rice husk ash (UFTRHA) were determined accordingly. As for amorphous silica content of the optimum sample was recorded as 98.60% incinerated at 600oC with four hours of pre-treatment soaking duration. In terms of particle size and specific surface, it was also observed that, burning temperature of 600oC, pre-treated at four hours were recorded to produce finest size of UFTRHA where d(0.1), d(0.5) and d(0.9) were obtained as 1.416 μm, 4.364 μm and 14.043 μm respectively. Largest specific surface area value was obtained at 219.58 m2/g with the similar pre-treatment conditions. Meanwhile, the strength activity of UFTRHA from the optimum pre-treatment process was measured by testing the compressive strength of mortars. The highest compression value obtained was 50.17MPa with 3% UFTRHA replacement at 28 days.
format	Article
author	Saad, Siti Asmahani Shafiq, Nasir Ali, Maisarah
author_facet	Saad, Siti Asmahani Shafiq, Nasir Ali, Maisarah
author_sort	Saad, Siti Asmahani
title	Physicochemical properties and pozzolanic performance of ultrafine treated rice husk ash (uftrha) as additive in concrete
title_short	Physicochemical properties and pozzolanic performance of ultrafine treated rice husk ash (uftrha) as additive in concrete
title_full	Physicochemical properties and pozzolanic performance of ultrafine treated rice husk ash (uftrha) as additive in concrete
title_fullStr	Physicochemical properties and pozzolanic performance of ultrafine treated rice husk ash (uftrha) as additive in concrete
title_full_unstemmed	Physicochemical properties and pozzolanic performance of ultrafine treated rice husk ash (uftrha) as additive in concrete
title_sort	physicochemical properties and pozzolanic performance of ultrafine treated rice husk ash (uftrha) as additive in concrete
publisher	Malaysian Institute of Planners
publishDate	2018
url	http://irep.iium.edu.my/69032/ http://irep.iium.edu.my/69032/ http://irep.iium.edu.my/69032/1/Paper_Asmahani_2018_MIP.pdf http://irep.iium.edu.my/69032/9/69032_Physicochemical%20properties%20and%20pozzolanic_scopus.pdf
first_indexed	2023-09-18T21:37:57Z
last_indexed	2023-09-18T21:37:57Z
_version_	1777412947836928000

Physicochemical properties and pozzolanic performance of ultrafine treated rice husk ash (uftrha) as additive in concrete

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