Abstract
This paper presented the effect of addition of Reclaimed Asphalt Pavement (RAP) on performance of mixture with (20%, 30%, 40% and 50%) RAP as proportion of asphalt mix. To compare with virgin mixture marshall flow and stability test was used to evaluated durability performance with (0,1,3, and 7) days immersion and Wheel Truck test was used to evaluated the resist to rutting. The best gradation and optimum asphalt content was selected according to Superpave system. Superpave Gyratory Compactor (SGC) was used to compact mixture with 100-mm diameter. The test results indicated that addition of RAP to mixes showed significant increase on resistance of Durability and Rutting.
Highlights
Recycling Hot Mix Asphalt (HMA) material results in a reusable mixture of aggregate and asphalt binder known as Reclaimed Asphalt Pavement (RAP), [1]. .Asphalt paving technologists reacted to this situation by developing recycling methods to reduce the demand on asphalt binder and thereby, reducing the costs of asphalt paving mixtures
When addition of 30% RAP content, the stability is increased with 21.6% and for addition of 40%; stability is increased with 41.9 %
It can be illustrated that the increase in inclusion of the RAP causes a decrease in flow for example the addition of 30% RAP, the flow is decreased with 2.7%, and an addition of 50% RAP, flow is decreased with 8.1%
Summary
Recycling Hot Mix Asphalt (HMA) material results in a reusable mixture of aggregate and asphalt binder known as Reclaimed Asphalt Pavement (RAP) , [1]. .Asphalt paving technologists reacted to this situation by developing recycling methods to reduce the demand on asphalt binder and thereby, reducing the costs of asphalt paving mixtures. For performance tests Li et al in 2005 studied the properties of low and high temperature of RAP binder by using two fresh asphalt grades; (PG 5828) and (PG 58-34) and mixes with three contents of RAP (0, 20%, and 40%), [5]. It found that G*/sinδ value is increasing with increase in RAP content which means its more stiffer than mix without RAP. Showed that the rut depth is decreasing with increase in RAP content which is affected by hardening the total binder in the mixture as well as it can be observed the mixture with recycled materials have good rutting resistance even though with high asphalt content lees than rut depth for control mix
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