Abstract
The current study investigates the effects of Fiber Reinforce Polymer (FRP) additive on the performance of Stone Mastic Asphalt (SMA) mixtures with SBS and Viatop Premium additives. The asphalt mixture used in the current study included SBS (Styrene-Butadiene-Styrene) additive modified at the rate of 5% according to the necessary preliminary studies, and some SMA mixture modified by adding FRP (Fiber Reinforced Polymers) additive prepared in dimensions of 5 cm in different proportions (0.3%, 0.5%, 0.7% and 0.9%). The mechanical properties of the mixtures were investigated, and the findings revealed that the SMA mixture; prepared by adding FRP additive, SBS modified bitumen, and Viatop Premium additive; increased the rutting, aging resistance and elasticity of SMAs. Moreover, load spread ability and fatigue life revealed an increase, whereas high temperature sensitivity and tendency to crack at low temperatures decreased throughout the study. The FRP contribution rate that improves the performance characteristics of the SMA mixture to the highest level was found to be 0.7%.
Highlights
The increase in traffic and heavy loads, and the collapse of roads earlier than their term of service, leads researchers to consider improving the performance of asphalt mixtures as an important issue
The current study aims at investigating the effects of SBS and Viatop Premium and Fiber Reinforce Polymer (FRP) additives on Stone Mastic Asphalt (SMA) problems such as bitumen drain down, moisture damage, fatigue, and increasing the life span of pavements
As it can be seen, the highest stability value was found in samples with 5% SBS, 0.3% Viatop Premium Plus, and 0.7% FRP additives
Summary
The increase in traffic and heavy loads, and the collapse of roads earlier than their term of service, leads researchers to consider improving the performance of asphalt mixtures as an important issue. Khodaii and Mehrara added 4%, 5% and 6% of SBS to bitumen to prepare a hot mixture which resulted in more resistant type of asphalt against permanent deformation. Based on their findings, the most effective results are reported for 5% SBS samples [7]. The addition of carbon fibers improves fatigue in asphalt via creating more resistance for structural distress in pavement or traffic loads [14]. The current study aims at investigating the effects of SBS and Viatop Premium and FRP additives on SMA problems such as bitumen drain down, moisture damage, fatigue, and increasing the life span of pavements
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