ABSTRACT
The
research is done to investigate the effect of coal waste powder as filler
material in hot mix asphalt. The coal waste after sampling from the coal
washing plant it was processed to achieve as filler and after incineration at
750oc the coal waste ash was produced. The main laboratory program consisted
of Marshall stability, indirect tensile strength and resilient modulus tests
conducted in dry and saturated conditions. After the test, results are compare
to the reference mix (i.e. a mix containing limestone powder) the coal waste and its
ash resulted in higher stability and resilient modulus. When both the coal
waste and lime powder in equal proportion results a mix with high water resistance.Considering the stress–strain curve obtained from indirect tensile
strength the toughness index parameter was determined which is an indicator of
energy absorbency or material flexibility. All this indicate that the mix
asphalt containing coal waste powder exhibit more flexible behavior than
reference mix.
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