Recycled waste paper\u2013cement composite panels reinforced with kenaf fibres: durability and mechanical properties

Stephen Osakue Amiandamhen,Samson Omokaro Osadolor

doi:10.1007/s10163-020-01041-2

Abstract

There is a growing interest on recycling of waste fibres as an alternative to landfill disposal. The aim of the study was to investigate the durability and mechanical properties of waste paper–cement composite panels reinforced with varying kenaf fibre content (FC, 2–10%). The panels produced were evaluated for properties including modulus of rupture (MOR) and apparent modulus of elasticity (MOE). The resistance of the panels was tested in the field for both termite damage and fungi decay for a period of 24 weeks. Accelerated decay test was also performed on selected samples. The results showed that the mean MOR ranged from 3.17 MPa for samples with 10% FC to 4.84 MPa for samples with 8% FC. The mean MOE ranged from 248 MPa for samples with 10% FC to 1298.1 MPa for samples with 8% FC. Statistical analysis showed that the effect of the fibre content was significant on the properties evaluated (p < 0.05). The study concluded that the optimum fibre content for improving the strength and physical properties of paper–cement composites in a ratio of 1:1 (w/w) using kenaf as reinforcing fibre is 8%. The panels were highly resistant to both termite and fungi attack for the study duration.

Highlights

Fibre-reinforced cement composites, as a building material, is not a novel subject
The samples with 8% fibre content had the highest strength property with values of 4.84, 1298.1 and 0.12 MPa for modulus of rupture (MOR), modulus of elasticity (MOE) and internal bond strength (IB), respectively. This was followed by samples with 6% fibre content for all measured strength properties
The manufacturing process is suited to the end of technology spectrum, as it presents opportunities for small-scale enterprises to produce durable and affordable fibre–cement materials

Summary

Introduction

Fibre-reinforced cement composites, as a building material, is not a novel subject. Natural fibres were used to reinforce clay bricks, and since mid to late twentieth century, different materials made from natural fibres and cementitious materials have been produced. Natural fibres are regarded as important alternative to synthetic fibres such as asbestos, glass, carbon and aramid [1]. Composite boards produced with asbestos fibres have been replaced due to the health hazards associated with such fibres. In a world driven by change, researchers are taking considerable efforts to develop building panels that are cost-effective and environment friendly.

Objectives

Methods

Results

Conclusion