Green kerb – green technology technique in the development of alternatives kerb using old tire
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Date
2017-06
Authors
Denesh Gunasegar
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Abstract
A technology is introduced on road kerbs in near future. This design is having
different prospective mainly in concrete mixture, other than that the dimension and it
existing JKR requirements still the same. This technology will give a positive impact
on the innovation industry and eco-system. The difference from other kerbs is that the
changes on coarse aggregate proportion in the concrete, that is the coarse aggregate will
be replaced with crumb rubber from vehicle tyres after been cut to the specified
dimension as coarse aggregate from 15-20 mm. Then it will be mix together with
concrete regarding to the percentage replaced by coarse aggregate. Few testing are done
such as slump, compression and rebound hammer test. The result for slump test shows
high in workability at the percentage of crumb rubber increase, the compression value
decrease and the rebound hammer test shows the concrete able to absorb the energy and
reduce the surface hardness. This study will bring a new hope if the mixing percentage
is done correctly. The total weight of road kerb is reduced by almost 8% in this new
technology, and the total estimated cost for road kerb for 1 kilometre of road is about
RM 23,171 for normal road kerb and RM 21,387 for this green kerb. This 20% CR
mixtures shows good result among other mixtures. The percentage of CR used are 20%,
this particular percentage has good workability, satisfy the concrete grade 25 strength
required and standard JKR (JKR/SPJ/1988).