Effect Of Cement Coated Aggregates On The Creep
And Deformation Characteristics Of Asphaltic
Concrete Bituminous Mixtures
Author(s)
I. Kamaruddin, Darmawan & M. Napiah
Abstract
The performance of asphaltic concrete mixtures used in flexible highway
pavement is governed to a large extent by the quality of the aggregates used in
the mixture. This study presents an investigation into the use of cement coated
aggregates in asphaltic concrete mixtures. Its advantages from the point of view
of creep and deformation characteristics are investigated in the laboratory and
comparison made with mixtures with untreated aggregates using the same
gradation and under the same condition of sample preparation and testing. The
use of cement treated aggregates in asphaltic concrete mixtures considerably
affects the creep behavior of the mixtures, higher stiffness values were obtained
for these mixtures as compared to that with the untreated aggregates. Stiffness
values increased with an increasing degree in the cement coating. Cement
treatment and bitumen content both affected the mixture stiffness in the asphaltic
concrete studied. Cement coated aggregate mixtures also showed better
deformation resistance as indicated by the lower deformation and wheel tacking
rate (WTR) obtained as compared to the control.
Keywords: aggregates, asphaltic concrete, cement coating, creep, deformation.
1 Introduction
Asphaltic concrete mixtures used in flexible pavements contain approximately
90–95% aggregates by weight. The performance of such mixtures is therefore
governed to a large extent by the aggregate quality which in turn is a function of
Keywords
aggregates, asphaltic concrete, cement coating, creep, deformation.
Related Book
Other papers in this volume
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