Prediction of Marshall test results for polypropylene modified dense bituminous mixtures using neural networks

Stabilizing and reinforcing effects of different fibers on asphalt mortar performance

“…Thus, fibers can stabilize asphalt to prevent leakage. This is due to the adsorption of asphalt on fibers (Tapkin et al 2010;Wu et al 2014). The reported results indicate that fiberasphalt mixtures have good moisture resistance, creep compliance, and rutting resistance, low-temperature anticracking properties, and durability (Tapkin et al 2010).…”

“…So, increasing the temperature would improve the cracking resistance of asphalt mortar, and this was in accordance with the low-temperature creep stiffness analysis. However, it has been reported that asphalt mixtures containing fiber have good low-temperature properties in terms of low-temperature flexural tests (Tapkin et al 2010). Hence, more research needs to be pursued to investigate the effect of fiber on the low-temperature performance of asphalt mixtures.…”

“…This is due to the adsorption of asphalt on fibers (Tapkin et al 2010;Wu et al 2014). The reported results indicate that fiberasphalt mixtures have good moisture resistance, creep compliance, and rutting resistance, low-temperature anticracking properties, and durability (Tapkin et al 2010). The mechanism of how fibers modify asphalt is complicated, yet the impact upon pavement performance is profound (Hassan et al 2005).…”

Rutting analysis of 100 mm diameter polypropylene modified asphalt specimens using gyratory and Marshall compactors

“…Tapkın has found that the addition of polypropylene fibers into the asphalt concrete on a dry basis alters the behaviour of the mixture in such a way that, Marshall stability values increase, flow values decrease and the fatigue life of the asphalt specimens increases significantly 28 . Tapkın et al have also worked with the addition of polypropylene fibers to the asphalt concrete on a wet basis, and have shown that the most favourable and suitable polypropylene type was multifilament, 3 mm long (M-03 type) which increased the Marshall stability values by 20% as well as the stiffness of the asphalt concrete 27,[29][30][31] . Repeated load creep tests under different loading patterns have also shown that the time to failure of fiber modified asphalt specimens under repeated creep loading at different loading patterns increased by 5-12 times versus reference specimens, which is a very significant improvement 32 .…”

“…Altogether the extra cost of using polypropylene fibers as a modifier is only 9.3% (for research purposes only, with no addition of technology and know-how, of course) but this cost is becoming much less, by diminishing the dependency on expensive imported modifiers and know-how 18 . This is a very important consideration for developing countries like Turkey 18,[27][28][29][30][31][32] . There are also a number of other studies in the literature on different applications of polypropylene fiber modification of asphalt concrete in the last decade [33][34][35][36][37][38][39][40] .…”