Abstract:
The use of accumulated waste materials in Ghana is still in its early phases. It will take
courage for contractors and others in the construction industry to recycle selected types of
waste materials for concrete products. The main objective of this research was to
investigate the feasibility of using ground vehicular tyre (GVT) as a partial replacement
for sand in the production of concrete pavement blocks. In this study cement, sand,
quarry dust, coarse aggregate, and ground vehicular tyre were used to produce rubberized
concrete pavement blocks (RCPBs). The mix proportion was 1: 1: 2: 2.25 (cement:
coarse aggregate: quarry dust: sand). The GVT was used to replace sand by volume at
0%, 10%, 20%, 30%, 40%, 50% and 60%. It was observed that density, compressive
strength, flexural strength, and splitting tensile strength decrease, as the GVT content
increases. However, the water absorption increases, as the GVT content increases.
Compressive strength level ranging from 2.48N/mm2
to 30.20N/mm2 was achieved when
water cement ratios of 0.20 to 0.35 were used. Even though, the test results shown that
the compressive strength reduces when GVT is used, the produced RCPBs can meet the
minimum strength requirement of 20N/mm2
for pedestrian walk way pavement blocks. In
this work, models were also developed to predict the density and compressive strength of
the produced RCPBs. It is concluded that the modified pavement blocks would contribute
to the disposal of the non-biodegradable tyres, since the amount being accumulated in
Ghana and the world as a whole is creating a challenge for proper disposal.
Description:
A thesis in the Department of DESIGN AND TECHNOLOGY, Faculty of TECHNICAL
and VOCATIONAL EDUCATION, submitted to the School of Graduate Studies,
University of Education, Winneba in partial fulfilment of the requirements for award of
the Master of Philosophy (Construction Technology) degree.
JULY, 201
