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IJSTR >> Volume 2- Issue 11, November 2013 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Weight Reduction Study Of Polycrete-An Asbestos-Free Building Material Product

[Full Text]

 

AUTHOR(S)

C.W. Adegoke

 

KEYWORDS

Keywords: polyethylene fibers, polycrete, asbestos-free, building materials, composite materials, mix ratio

 

ABSTRACT

ABSTRACT: Motivated by the dual need of developing alternative non-carcinogenic building material products from local raw materials and the need for sustainable solid waste management of polyethylene packaged water sachets waste in Nigeria, an asbestos-free composite material, polycrete, viable for use as ceiling and partitioning boards in buildings was recently developed by the author. The technical viability of forming a durable composite material from polyethylene fibers (shredded/granulated polyethylene sachets- poly-fibers), and cement in durable economic mix ratio of 1:4 by volume (i.e. one part of cement with 4 parts of fiber) was established with test specimens cast in plastic moulds as presented at RETAV Conference 2009, at Obafemi Awolowo University, Ile-Ife, Nigeria. In order to meet workability requirements (for easy penetration of nails), some amount of paper was also added to introduce some ductility to the mix. Building on the success of initial trials with model specimens, prototype ceiling boards, 600mm x 600mm in size are now being investigated for production. Replicating the mix ratios as established for the model specimens in the prototype production, final product weight of 4.4kg per piece was achieved. It was considered desirable to reduce the weight per product to about 3.5kg so as to be comparable with lighter ceiling products made from gypsum (Plaster of Paris - POP). Various combination weights of Portland cement, poly-fibers, waste paper, and water were varied with the objective of producing a 600mm x 600mm prototype with a product weight not exceeding 3.5kg. This paper presents results of the trials and establishes a minimum weight of 2.5kg Portland cement, 0.5kg poly-fiber, 0.1kg paper and 2.25kg of water to produce a 600mm x 600mm by 5.0mm thick ceiling board with a product weight of 3.35kg. Production process was replicated several times with durable prototypes being formed each time. A comparable asbestos-cement ceiling sheet (produced by Nigerite - 1.2m x 1.2m x 3.5mm thick in dimension - four times the surface area of polycrete product) weighs 8.0kg. In addition to the asbestos-free attribute of polycrete, other obvious advantage of Polycrete Decorative Ceiling board over the Nigerite product is the artistic pattern design embossed on it, making it aesthetically more pleasing to home owners than the plain version of Nigerite product.

 

REFERENCES

1. C.W. Adegoke, M.B. Gasu, , and S. Abiona, “Waste-to-Wealth Technology in Conversion of Polyethylene Pure Water Sachets Waste to an Alternative Building Material Product” The Role of Engineering and Technology in Achieving Vision 20:2020 (RETAV) Conference, Obafemi Awolowo University, Ile-Ife, Nigeria. November , 2009.

2. O.A. Koya, , C.W. Adegoke, and O.M. Kayode “Mathematical Modelling of Communition Process of Some Selected Raw Materials by Hammer Mill”- A Technical Proposal submitted to Raw Materials Research and Development Council (RMRDC) and National Mathematical Centr e(NMC), Abuja, Nigeria. (2009)

3. Arnon, Bentur et al “Fiber Reinforced Cementatious Composites”, London Elsevier Applied Sciences, 1990.

4. St. John D. A. et al “Concrete Petrography” - A Handbook of Investigative Techniques, London Arnold Publishers, 1998.

5. A.M. Neville, “Properties of Concrete” Pitman Publishing Limited, 1977.

6. I. Adewumi: “Municipal solid wastes Management: The need for a paradigm shift”, Ife Environmentalist, Nigerian Society of Environmental Management (NISEM), Ife. pp 1-2. 2004.