Performance of Rice Husk Ash as a Partial Cement Replacement in Fine Grained Mortar

Noor Shuhada Mohammad,Suraya Hani Adnan,Zalipah Jamellodin,Wan Yuslinda Wan Yusof

doi:10.4028/www.scientific.net/amm.773-774.969

Noor Shuhada Mohammad, Suraya Hani Adnan + Show 2 more

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https://doi.org/10.4028/www.scientific.net/amm.773-774.969

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Abstract

This paper investigates the performance of rice husk ash (RHA) in a fine grained mortar. RHA produced from control combustion of rice husk. Fine grained mortar (FGM) is a mortar containing fine sand with a maximum size of 1mm. Chemical composition of RHA and Ordinary Portland Cement (OPC) were investigated using XRF in order to know the silica content in these materials. The particle size of RHA was analyzed to make sure it fineness is same with OPC after grinding. Compressive and flexural strength of FGM were tested on mortar prism for size 40mm x 40mm x 160mm with replacement of RHA 10%, 20% and 30% by weight of cement at 7 days and 28 days ofcuring. All 24 specimens of FGM were caste and tested. The flexural strength, compressive strength of FGM have shown quite encouraging and interesting results. The optimum replacement of RHA in FGM from compressive and flexural strength is 20% by weight of cement.

Highlights

Utilization of agricultural waste material are required in the sustainable development of the concrete industry
It is observed that the flexural strength of Fine grained mortar (FGM) was increased by 10% and 20% replacement compared to the control specimen
The maximum flexural strength was obtained at 20% replacement of rice husk ash (RHA) with result 4.37 N/mm2 at 7 days and 6.66N/mm2 for 28 days compared to control FGM

Summary

Introduction

Utilization of agricultural waste material are required in the sustainable development of the concrete industry. Some of the commonly agriculture waste material are RHA, palm oil fuel ash and bagasse ash. These wastes can be used as a supplementary cementing materials in concrete[1,2,3,4]. Rice husk is one of the waste material from agricultural industry. Pozzolanic material is a siliceous and aluminous material which in itself have little or no cementitious value, but will in finely divided with the presence of moisture. It will chemically react with calcium hydroxide at ordinary temperature during hydration of Portland cement [15]. Numerous study to know the strength of concrete and mortar with optimum replacement level 10% to 30% of OPC by RHA [4,5,8,9,10]

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