The Design and Properties of Split Mastic Asphalt Modified with Crumb Rubber
ABSTRACT: Stone Mastic
Asphalt, originated from Germany in the 1970s,has superior properties on
heavily trafficked roads and industrial applications. Modification of split
mastic asphalt with crumb rubber makes asphalt more temperature stable. The
objectives of this research are: To design split mastic asphalt modified with
crumb rubber mixture, to get the best composition of stone mastic asphalt
modified with crumb rubber for rut and fracture resistance, to assess the
physical characteristics of split mastic asphalt modified with crumb rubber and
compare with unmodified SMA. Stone mastic asphalt was modified with 0%, 2%, 4% and
6% crumb rubber. The Marshal properties were conducted. The result showed that
marshal stability, Marshal Quotient, Voids in Mix (VIM) and Voids in mineral
aggregate (VMA) decrease with higher crumb rubber modifier. However, Marshal
Flow and Void filled with asphalt (VFWA) increase when crumb rubber modifier
was increased. Therefore, Crumb rubber could be used as aggregate substitute
for flexible stone mastic asphalt at hot and arid region because it is
temperature tolerant and can prevent asphalt cracking.
Author: Abuseta, Ahmad
Alhashmi Salam
Journal Code: jptsipilgg140013
