A STUDY OF CRUMB RUBBER MODIFIED ASPHALT SLURRY SEAL EMULSIONS
A STUDY OF CRUMB RUBBER MODIFIED ASPHALT SLURRY SEAL EMULSIONS
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Date
2014-05
Authors
FAROUQ, ZAKARI UMAR
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Abstract
The suitability of Crumb Rubber (CR) to partially modifying bitumen in Asphalt Emulsion
production for use as slurry seal was investigated. Bitumen was replaced with 0%, 5%, 10%,
15%, 20% and 25% Crumb Rubber, and subjected to methyl blue, sand equivalency, cohesion,
wet track abrasion (WTA) and loaded wheel tracks (LWT) tests. Preliminary tests: using
Penetration, Softening point, Viscosity and Flash and Fire point tests were also performed on the
bitumen. Based on the result of the tests, optimum CR content of 17.5% was recommended for
use, because it achieved a smooth texture, within mixing time of 200 Seconds and Cohesion at
30 and 60minutes of 23 and 28 Kg-cm respectively. WTA Loss of 365.2g/m2, are within the
limits specified by the International Slurry Seal Association. Above the Optimum Crumb Rubber
the texture of the mixture was not smooth enough for use as slurry sealant. Successful use of CR
will serve as an effective way of converting rubber waste to beneficial use, thereby saving the
environment and conserving bitumen.
Description
A THESIS SUBMITTED TO THE
POSTGRADUATE SCHOOL, AHMADU BELLO UNIVERSITY,
ZARIA NIGERIA
IN PARTIAL FULFILLMENT FOR THE
AWARD OF MASTERS OF SCIENCE (MSc.) DEGREE OF
CIVIL ENGINEERING
DEPARTMENT OF CIVIL ENGINEERING,
FACULTY OF ENGINEERING,
AHMADU BELLO UNIVERSITY, ZARIA
NIGERIA
MAY 2014
Keywords
STUDY,, CRUMB,, RUBBER,, MODIFIED,, ASPHALT,, SLURRY,, SEAL,, EMULSIONS.