Compressive strength and microstructure analysis of treated rice husk ash (TRHA) incorporated mortar

Saad, Siti Asmahani and Shafiq, Nasir and Mohamed Osman, Mariana and Masjuki, Siti Aliyyah (2018) Compressive strength and microstructure analysis of treated rice husk ash (TRHA) incorporated mortar. In: International Graduate Conference on Energy, Engineering & Technology 2018 (iGRAD2018), 4th-6th September 2018, Putrajaya, Malaysia. (Unpublished)

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Abstract

High amount of reactive silica is ubiquitous in pozzolanic reaction for concrete strength increment. Rice husk ash (RHA) is proven contains high content of amorphous silica that is essential in the pozzolanic reaction of effective additive in concrete. Nevertheless, incorporation of RHA as cement replacement material (CRM) or additive is very minimal in current concrete industry. Therefore, improvement on the RHA properties by introduction of thermal and chemical pretreatment prior to incineration process is considered as a promising way in order to achieve the goal. This treatment process has been reported widely in literature. In this paper, the effect of treated rice husk ash (TRHA) and non-treated rice husk ash (NTRHA) incorporated mortar in terms of its compressive strength and microstructure properties are examine subsequently. The strength activity of TRHA from the optimum treatment process was measured by testing the compressive strength of mortars. The highest compression value obtained was 50.73MPa with 3% UFTRHA replacement at 28 days. At a longer curing period i.e. 90 days, it was recorded that 3% of UFTRHA mortar had the highest compression value at 53.87MPa. As for microstructure properties, a denser microstructure with excellent aggregate bonding and cement matrix in the interfacial transition zone (ITZ) was observed.

Item Type:	Conference or Workshop Item (Slide Presentation)
Additional Information:	8389/69035
Uncontrolled Keywords:	Compressive strength; microstructure properties; physicochemical properties of rice husk ash (RHA); cement replacement material (CRM); Treated Rice Husk Ash (TRHA); Non-Treated Rice Husk Ash (NTRHA); high energy milling.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA349 Mechanics of engineering. Applied mechanics T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering
Depositing User:	Dr Siti Asmahani Saad
Date Deposited:	10 Jan 2019 10:48
Last Modified:	10 Jan 2019 10:48
URI:	http://irep.iium.edu.my/id/eprint/69035

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