THE RUBBERIZED CONCRETE FOR CRACK RESISTANT CONCRETE PAVEMENT
Abstract: The concrete is the
most used material in civil engineering world. The crumb rubber had been added
to the concrete instead of fine aggregate to used in a walls as a sound
insulator and less heat conduction compared with concrete without rubber.
(Intesar et al, 2011). Many experiments were done to find out appropriate methods
of rubber application. Commonly, fully replacing coarse aggregate (gravel) or
fine aggregate (sand) with rubber is not appropriate because the loss of
strength is too severe. However, with small portion of aggregates replaced, the
loss in compressive strength was not significant. A research study by Khatib et al (1999) and
Schimizze et al (1994) suggested that rubber should not exceed (17-20%) of the
total aggregate volume. Whenever possible to use the waste tyres in the
construction work, it is possible to find effective solutions to prevent
environmental pollution. The aim of this research to investigate the property
and crack resistant of rubberized concrete. This research used crumb rubber of
waste tyres in a concrete as replacement of aggregate. Three dosage of crumb
rubber (5,10 and 15)% by volume were used. One mixture of plain concrete was
also tested as reference and compare the results to the standard specification
of rigid pavement. Those mixtures then prepared for fresh concrete and hardened
concrete test. Slump test was conducted for assessing the fresh concrete
performance while for hardened concrete performance, the compressive strength
at 3,14 and 28 days were tested, the restrained shrinkage for early age of
concrete were tested for 6 hours from casting and the shrinkage measurements
taken when the age of concrete
1,3,5,7,9,11,13,15,18,21,25, and 28 days. The results of this research show
that the crumb rubber was an effective material to resist the cracks in concrete.
The results of compressive strength show that the compressive strength decrease
when the amount of crumb rubber increase. The results of shrinkage test and
restrained shrinkage test show that the cracks in the concrete decrease when
the amount of crumb rubber increase. The total crack length reduce by (18.6,
55.2 and 58.2%) when the aggregate was replaced by (5, 10 and 15%) of crumb
rubber. The number of cracks reduce by (11.34, 42.67 and 49.34%) when the
aggregate was replaced by (5, 10 and 15%) of crumb rubber.
Keywords: crumb rubber,
rubberized concrete, cracks, compressive strength, shrinkage, restrained
shrinkage
Author: Fouad M. Ali Bin
Ghasheir, Ary Setiawan, Sholihin As’ad
Journal Code: jptsipilgg140016

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