Effect of Rock Asphalt on the Surface Free Energy of Asphalt

Li, Jing; Zhang, Xiao Ning; Liu, Yu; Wu, Chuan Hai

doi:10.4028/www.scientific.net/amr.785-786.963

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…Studies showed the improvement in high temperature and temperature sensitivity performance with addition of rock asphalt [14,15]. Li et al reported that the America rock asphalt can increase the surface free energy of asphalt and thus results in a better moisture damage resistance [16]. It was reported that the moisture damage resistance, tensile strength and fatigue performance of petroleum mixture were enhanced as well with the addition of rock asphalt from Xinjiang, China.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Iraq Natural Asphalt on Mechanical Properties of Bituminous Hot Mixtures

2022

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The increasing rate of traffic every day requires the roads to be made more stable. In order to improve the low and high temperature properties of the bituminous mixtures forming the coating layer of the flexible pavements, the binder in the mixture is often modified with various polymers. The most commonly used polymer in the modification is styrenebutadiene-styrene (SBS). However, SBS, which is very successful in improving the mechanical properties of the mixtures, is expensive and has brought the search for cheaper alternative additives. In this context, natural asphalts (NA) which are not subjected to any processes are used as additive. In this study, natural asphalt obtained from Zaho region of Iraq was used in 20%, 35% and 50% of bitumen modification by weight. The mechanical properties of mixtures prepared with different amount of NA modified bitumen were compared with 4% SBS modified bituminous mixtures. As a result, NA modification significantly improved the properties of bituminous mixtures. In particular, above 35% NA, the mixtures exhibited a superior performance by significantly resisting the effect of repeated loads. It was found that an average of 17.3% NA modification exhibited similar behavior with 4% SBS modification and provided significant economic savings.

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Section: Introductionmentioning

confidence: 99%