Variance analysis and performance evaluation of different crumb rubber modified (CRM) asphalt

Liu, Shutang; Cao, Weidong; Fang, Jianguo; Shang, Shujie

doi:10.1016/j.conbuildmat.2008.12.009

Cited by 180 publications

(67 citation statements)

References 11 publications

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“…According to a study 13 , the higher the crumb rubber content is, the higher viscosity at 135 °C could improve the rutting properties. It was also observed that the increased crumb rubber amount produced rubberised bitumen with higher viscosity and lower resilience 14,15 . However, for optimum crumb rubber content; crumb rubber size and asphalt binder need to be determined.…”

Section: Introductionmentioning

confidence: 94%

Investigating the rheological properties of crumb rubber modified bitumen and its correlation with temperature susceptibility

Mashaan

Karim

2012

Mat. Res.

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There is substantial evidence on the advantages of using crumb rubber in enhancing conventional bitumen properties, gaining environmental protection and boosting industrial-economical benefits. Thus, the use of this ingenious additive in bitumen modification through sustainable technology is highly advocated.The main objective of this research is to investigate the effects of different blending conditions (of time and temperature) and various crumb rubber contents on the properties of bitumen binders. Testing was conducted using the Dynamic shear rheometer (DSR) test and softening point test. The results showed that differing crumb rubber contents and blending temperature have significant effects on modified binder properties whereas the blending time showed an insignificant effect. Higher blending temperature and crumb rubber content were found to influence the interaction of bitumen-rubber blends and also increased the swelling rate of rubber particles, resulting in an increase in complex shear modulus (G*), storage modulus (G'), loss modulus (G") and softening point as well as a decrease in phase angle (δ). Thus, the modified bitumen became less susceptible to deformation after stress removals. The study also presented a considerable relationship between rheological parameters (G*, G', G' and δ) and softening point in terms of predicting physical-mechanical properties regardless of blending conditions. Thus, in terms of elasticity for the softening point data, the storage modulus and phase angle were found to be good indicators of binder elasticity. When softening point is made available, a prediction about binder ability to recover its original shape after stress removals can be done.

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Section: Introductionmentioning

confidence: 94%

Investigating the rheological properties of crumb rubber modified bitumen and its correlation with temperature susceptibility

Mashaan

Karim

2012

Mat. Res.

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“…Thodesena et al (2009) developed an empirical model depicting the changes in values of G*⁄/sin δ and failure temperatures. Liu et al (2009) evaluated the performance of different modified binders with different CR contents, the particle size or type by using the analysis of variance method.…”

Section: Introductionmentioning

confidence: 99%

Using Crump Rubber (CR) of Scrap Tire in Hot Mix Asphalt Design

Ahmad¹

2017

American Journal of Applied Sciences

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Hot Mix Asphalt (HMA) design is one of the most important types of pavement used in highway construction. This research provided a hot mixture design method modifying with Crump Rubber Scrap Tire (CR) in order to develop and determining the optimum additive for hot mix asphalt design. All tests conducted to the raw material including specific gravity, compact test and absorption content to ensuring its quality. In this research, hot mix designed as a stander without any additives and with (4.5, 5, 5.5, 6, 6.5 and 7%) percent of asphalt content. All specimens of each asphalt percent content were tested after 24 h, according to AASHTO. The additives in this research were prepared by two methods (wet process and dry process). The results show that in dry process all additives cause a failure and the segregation was the major reason for failure. In wet process the selected wet process at 5.5% CR by weight of binder content was optimum were its raising the stability value to 65% of original stability in standard mix, which lead to decreasing the rutting effects.

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“…Considering the effect of different preparation process parameters on the performance of rubber modified asphalt, this paper analyzed the effects of the shear temperature, shear time and shear rate on the performance of the rubber modified asphalt, which provided a reference for its preparation [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effects of preparation process on performance of rubber modified asphalt

Liu

Luo

Wang

et al. 2015

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The rational utilization of waste rubber tire is essential for the environmental protection. Utilizing rubber particles to modify asphalt can not only improve asphalt performance, but also help the recycling of waste materials. Considering the effect of different preparation process parameters on the performance of rubber modified asphalt, this paper analyzes the effects of the shear temperature, shear time and shear rate on the performance of rubber modified asphalt, and provided a reference for its preparation. IntroductionThe increasing traffic load and the more frequent extreme weather conditions put higher requirements on the performance of the road construction materials. In recent years, road damage phenomena such as pavement rut, bleeding and bulling have happened very frequent and become increasingly serious. Therefore, how to improve the performance of asphalt mixture and prolong the service life of pavement becomes an important research direction of the road building materials [1].The amount of waste rubber tire has been increasing along with the number of cars growing in China. Relevant data show that there are new 250 million waste rubber tires totaling 520 tons in 2010. The existing recycling level of waste rubber tire is low and large numbers of tires are disposed with fire, which has aggravated the environmental pollution. In fact, waste can be turned into treasure as the effective components contained in waste rubber tire can be used for asphalt modification. Studies on rubber modified asphalt have attracted broad attention of scholars all over the world [1,2].Waste rubber tire is an ideal asphalt modifier, including natural rubber, synthetic rubber, carbon black and other ingredients. It's shown in some research papers that adding rubber particles into asphalt can significantly improve the performance of asphalt and its mixture, such as enhancing durability of pavement, increasing the toughness and elasticity recovery of asphalt, improving the aging resistance and anti-rutting ability, and reducing the pavement noise etc. [3,4].The process of rubber modified asphalt mainly consists of dry and wet processes, and the wet process has been widely applied in real-world engineering. Considering the effect of different preparation process parameters on the performance of rubber modified asphalt, this paper analyzed the effects of the shear temperature, shear time and shear rate on the performance of the rubber modified asphalt, which provided a reference for its preparation [5][6][7][8][9][10].

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Variance analysis and performance evaluation of different crumb rubber modified (CRM) asphalt

Cited by 180 publications

References 11 publications

Investigating the rheological properties of crumb rubber modified bitumen and its correlation with temperature susceptibility

Investigating the rheological properties of crumb rubber modified bitumen and its correlation with temperature susceptibility

Using Crump Rubber (CR) of Scrap Tire in Hot Mix Asphalt Design

Effects of preparation process on performance of rubber modified asphalt

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