Abstract:
Preparation of the porous asphalt skeleton and
cement grout for void filling are two major parts in the design
of Semi Rigid Pavement. Finding the optimum mix ratios for
cement grout and the level of compaction for asphalt mixtures
were the objectives of this research. This paper mainly
deliberates the design of experiments, data collection and
analysis of semi rigid pavements mixtures. Workability test and
compressive strength of cement grout and compressive strength,
indirect tensile strength and qualitative measurements of semi
rigid mixtures were considered in the designing of the semi rigid
pavement mixtures. And also, to confirm the cement grout
mixture composition, the penetration capability of cement grout
and visual observations were studied. Optimum cement content,
void filled with cement grout and the stability of the asphalt
mixture for early age traffic were the other factors considered
in the selection of the compaction level of the porous asphalt
mixture. 20 blows in marshal compaction, 5% Silica fume, 0.39
water/cement ratio and 2ml/kg A & F type admixture were
selected for the semi rigid mixture design.
