Abstract

The main objective of the experimental work is to identify the mechanical properties of Kenaf Fiber incorporate with Ordinary Portland Cement (OPC) and Pulverised Fuel Ash (PFA) in the mix proportions of concrete. Kenaf Fibrous Concrete (KFC) and Kenaf Fibrous Pulverised Fuel Ash Concrete (KFPC) will be measured on physical and mechanical properties in order to investigate the suitability of this natural fiber as a composite material. A comparison of properties between these two composites will determine the density, workability, compressive, tensile, and flexural strength of the concrete. Eight different mixes with varying percentage of Kenaf fiber were prepared with 30N/mm2 strength at 28days ,56 days and 90 days. Short fiber with 25mm and 50mm length were randomly distribute in composite to enhance the tensile and durability. PFA was obtained by the process of burning in the Power Station Coal Ash at Tanjung Bin, Johor. The unburning powder from the process is called as a PFA generally suitable for cement replacement in the concrete mix. The pozzolanic reaction will improve the adhesion of cement gel, hence increased the properties of concrete in a long-term strength development. The result shows that the inclusion of Kenaf fiber improve tensile strength of composite, furthermore the 25% PFA mix increase the durability of concrete.

Highlights

  • The production of many synthetic fibers may contribute to the emission of many CO2 through a chemical process and somehow pollute the environment

  • Pulverised Fly Ash Powder was collected from Tanjung Bin Power Plant, Pontian, Johor is class F, whereby the chemical composition of Silica, Alumina and Iron oxide are more than 70% according to ASTM C618 [6]

  • 3.2.1 Compressive Strength Results The compressive strength of Kenaf Fibrous Pulverised Fuel Ash Concrete (KFPC) is decreased than the normal concrete and Pulverised Fuel Ash (PFA) concrete as shown in figure 3

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Summary

Introduction

The production of many synthetic fibers may contribute to the emission of many CO2 through a chemical process and somehow pollute the environment It may produce carbon dioxide and nitrous oxide that 310 times more harmful than natural fiber [1]. The main concern of this study is to use waste material from the burning of Power Station Coal Ash and Kenaf plant to introduce a new composite material for the construction industry. This ‘greener’ concrete has many potentials on restrain load and durable [4]. Kenaf Fiber was extracted from Kenaf plant that have strong capability in tensile and bending performance

Kenaf Fiber
Pulverised Fuel Ash
Aggregates
Samples and Mix Proportion
Test Specimen and Setup
Flexural Strength Test
Physical Properties of KFPC
Mechanical Properties of KFPC
Splitting Tensile Test Results
Conclusion

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