Palm Oil Fuel Ash (POFA) and Eggshell Powder (ESP) as Partial Replacement for Cement in Concrete

Mazizah Ezdiani Mohamad,Nur Nadhira A.R,Alicia Yik Yee Min,Ali A Mahmood,N Mohamed Noor,A.W Azhari

doi:10.1051/e3sconf/20183401004

Abstract

This study is an attempt to partially replace Ordinary Portland cement (OPC) in concrete with palm oil fuel ash (POFA) and eggshell powder (ESP). The mix proportions of POFA and ESP were varied at 10% of cement replacement and compared with OPC concrete as control specimen. The fineness of POFA is characterized by passing through 300 μm sieve and ESP by passing through 75 μm sieve. Compressive strength testing was conducted on concrete specimens to determine the optimum mix proportion of POFA and ESP. Generally the compressive strength of OPC concrete is higher compared to POFA-ESP concrete. Based on the results of POFA-ESP concrete overall, it shows that the optimum mix proportion of concrete is 6%POFA:4% ESP achieved compressive strength of 38.60 N/mm2 at 28 days. The compressive strength of OPC concrete for the same period was 42.37 N/mm2. Higher water demand in concrete is needed due to low fineness of POFA that contributing to low compressive strength of POFA-ESP concrete. However, the compressive strength and workability of the POFA-ESP concrete were within the ranges typically encountered in regular concrete mixtures indicating the viability of this replacement procedure for structural and non-structural applications.

Highlights

Concrete plays a crucial role in developing the infrastructure of all nations
This paper focuses mainly on the effect of different mix proportions of palm oil fuel ash (POFA) and eggshell powder (ESP) as partial cement replacement concrete
Based on the results obtained and above discussion, the following conclusion can be drawn: POFA-ESP concrete exhibits lower strength development compared to Ordinary Portland cement (OPC) concrete

Summary

Introduction

Concrete plays a crucial role in developing the infrastructure of all nations. Nowadays, sustainable construction has gradually become a topic of interest in the engineering as well as other fields. Many research studies have been carried out on utilising the wastes from generated by the industry as cement replacement in the construction industry [1 – 4]. Palm oil fuel ash (POFA) is one such waste. According to Ekiti et al [12], POFA can be used as a replacement of cement because it contains a high pozzolanic material, which will help to increase the durability as well as compressive strength of concrete. According to Pliya and Cree [13], 1 billion eggs would produce 6600 tonnes of limestone powder and the amounts would not be enough for concrete industry but in total it could be used as partial cement replacement. This paper focuses mainly on the effect of different mix proportions of POFA and ESP as partial cement replacement concrete

Material and Mix Proportion

Slump Test

Density

Workability

Density of Concrete

Conclusions