Properties of recycled asphalt
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paper
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Pro
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The cost of flexible pavement construction, rehabilitation and maintenance is largely
determined by the cost of the aggregate and binder (bitumen or asphalt cement)
components. The soaring cost of petroleum products since the early nineteen sixties has
made the bitumen contribution to the cost disproportionately large. Tanzania being one
of the countries which do not produce petroleum, spends about 81 per cent of its foregn
exchange (1989/90 budget) on purchase of petroleum products. The cost of production
of aggregates in Tanzania is also very high. Under these circumstances recycling of
bituminous materials on existing road and airport pavements, most of which need major
rehabilitation, will save the country a lot of foreign exchange. The aim of the research
therefore is to investigate the possibility of recycling bituminous materials, based on
assessment of three major mechanical properties: the elastic stiffness, resistance to
permanent deformation (creep) and fatigue [continued]…
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