The Shaping Process Research on Crumb Rubber Modified Asphalt Mixture

2012 ◽  
Vol 178-181 ◽  
pp. 1568-1572 ◽  
Author(s):  
Miao Yu ◽  
Guo Xiong Wu ◽  
Wei Liu ◽  
Xiu Yun Wang ◽  
Liang Zhang
Keyword(s):  
Asphalt Mixture ◽  
Crumb Rubber ◽  
Aggregate Gradation ◽  
Highway Engineering ◽  
Modified Asphalt ◽  
Waste Tire ◽  
Preparation Conditions ◽  
Shaping Process ◽  
Rubberized Asphalt Mixture ◽  
Air Void

The application of waste tire rubber in highway engineering mainly focuses on the modification of asphalt rather than the asphalt mixture, which restricts the application of waste tire. The addition of rubber has an effect on the performance of the mixture because of the obvious difference between rubber and mineral aggregates. This paper makes a research on the preparation technology of the specimens made of crumb rubber modified asphalt mixture in the laboratory by means of the study of selection of rubber、aggregate gradation、compaction temperature and so on. The effect of compaction was investigated in terms of the air void of the specimens under different preparation conditions. The optimal preparation process of rubberized asphalt mixture is put forward which could be proved to effectively control the pavement damages such as loose、stripping and so on.

Laboratory Assessment of Workability of Asphalt Rubber Hot Mixes Using Warm Mix Technology

2012 ◽  
Vol 193-194 ◽  
pp. 452-457 ◽  
Author(s):  
Meng Yun Huang ◽  
Jing Hui Liu ◽  
Xi Zhang ◽  
Dan Ni Li
Keyword(s):  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Crumb Rubber ◽  
Laboratory Assessment ◽  
Asphalt Mixes ◽  
Modified Asphalt ◽  
The Road ◽  
Asphalt Rubber ◽  
Synergy Effects ◽  
Save Energy

Using the waste crumb rubber modified asphalt to pave the road surface could reduce cost and save energy. However，in order to obtain adequate workability, the mixing temperature and compaction temperature of rubberized asphalt binder and its mixture is much higher than those of conventional asphalt mixtures. Warm Mix Asphalt (WMA) is the name given to certain technologies that reduce the production and placement temperatures of asphalt mixes. One of the main benefits advertised is the increased workability at conventional and lower compaction temperatures with the WMA addition. This paper evaluates whether there are any synergy effects of using warm mix technologies and Asphalt Rubber(AR) hot mixes. This paper summarizes a lab research to evaluate the workability of Asphalt Rubber hot mixes containing warm mix technologies. Both asphalt binder and asphalt mixture were evaluated and compared. The research suggests that combining WMA technology with Asphalt Rubber mixtures is a win-win.

Experimental evaluation of crumb rubber and polyethylene integrated modified asphalt mixture upon related properties

2018 ◽  
Vol 20 (6) ◽  
pp. 1413-1428 ◽  
Author(s):  
Jizhe Zhang ◽  
Zhanyong Yao ◽  
Tenghai Yu ◽  
Shengjie Liu ◽  
Hongguang Jiang
Keyword(s):  
Experimental Evaluation ◽  
Asphalt Mixture ◽  
Crumb Rubber ◽  
Modified Asphalt

Comparison Study on Road Performance of Modified Asphalt Mixture for Intermediate Course

2014 ◽  
Vol 941-944 ◽  
pp. 687-690 ◽  
Author(s):  
Zhao Hui Sun ◽  
Guang Qiang Zhu ◽  
Jing Ma ◽  
Qing Bin Yu ◽  
Bao Yang Yu ◽  
...  
Keyword(s):  
Asphalt Mixture ◽  
Water Stability ◽  
High Grade ◽  
Comparison Study ◽  
Excellent Performance ◽  
Highway Engineering ◽  
Northeast Region ◽  
Modified Asphalt ◽  
Road Performance ◽  
Temperature Water

High temperature, low temperature, water stability and fatigue test were done for three types of modified asphalt mixture of intermediate course used in high-grade highway engineering in Northeast region. The asphalt mixture design scheme with excellent performance suitable for application of intermediate course was selected for reference in Northeast area.

scholarly journals Predict the Phase Angle Master Curve and Study the Viscoelastic Properties of Warm Mix Crumb Rubber-Modified Asphalt Mixture

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5051
Author(s):  
Fei Zhang ◽  
Lan Wang ◽  
Chao Li ◽  
Yongming Xing
Keyword(s):  
Phase Angle ◽  
Dynamic Modulus ◽  
Master Curve ◽  
Loss Modulus ◽  
Asphalt Mixture ◽  
Crumb Rubber ◽  
Asphalt Mixtures ◽  
Master Curves ◽  
Modified Asphalt ◽  
Sigmoidal Model

To identify the most accurate approach for constructing of the dynamic modulus master curves for warm mix crumb rubber modified asphalt mixtures and assess the feasibility of predicting the phase angle master curves from the dynamic modulus ones. The SM (Sigmoidal model) and GSM (generalized sigmoidal model) were utilized to construct the dynamic modulus master curve, respectively. Subsequently, the master curve of phase angle could be predicted from the master curve of dynamic modulus in term of the K-K (Kramers–Kronig) relations. The results show that both SM and GSM can predict the dynamic modulus very well, except that the GSM shows a slightly higher correlation coefficient than SM. Therefore, it is recommended to construct the dynamic modulus master curve using GSM and obtain the corresponding phase angle master curve in term of the K-K relations. The Black space diagram and Wicket diagram were utilized to verify the predictions were consistent with the LVE (linear viscoelastic) theory. Then the master curve of storage modulus and loss modulus were also obtained. Finally, the creep compliance and relaxation modulus can be used to represent the creep and relaxation properties of warm-mix crumb rubber-modified asphalt mixtures.

Study on Processing Technology of Waste Tire Crumb Rubber Modified Asphalt

2011 ◽  
Vol 305 ◽  
pp. 402-405 ◽  
Author(s):  
Lan Yun Chen ◽  
Zhuo Hong Cong ◽  
Qing Long You ◽  
Nan Xiang Zheng
Keyword(s):  
High Speed ◽  
Rapid Development ◽  
Crumb Rubber ◽  
Processing Technology ◽  
Processing Temperature ◽  
Time Processing ◽  
Waste Tires ◽  
Modified Asphalt ◽  
Waste Tire ◽  
Stirring Time

The rapid development of automotive brought a lot of accumulation of waste tires. Waste tire crumb rubber mixed with asphalt not only eliminates its impact to the environment, but also improves the performance of asphalt. Crumb rubber modified asphalt was made by the high-speed shearing device using waste tire crumb rubber mixed with Karamay-90 asphalt. The influence of mixed time, stirring time, processing temperature and the fineness of crumb rubber to the performance of crumb rubber modified asphalt was studied.The best processing technology of crumb rubber modified asphalt was obtained.

scholarly journals Laboratory and Field Investigation of the Feasibility of Crumb Rubber Waste Application to Improve the Flexibility of Anti-Rutting Performance of Asphalt Pavement

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1738 ◽  
Author(s):  
Hongyin Li ◽  
Hailong Jiang ◽  
Wenwu Zhang ◽  
Peng Liu ◽  
Shanshan Wang ◽  
...  
Keyword(s):  
Resilient Modulus ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Crumb Rubber ◽  
Field Investigation ◽  
Compression Tests ◽  
Modified Asphalt ◽  
Asphalt Mix ◽  
Low Temperature Cracking ◽  
Indirect Tensile

Resistance of asphalt mix to low-temperature cracking and rutting at high temperature is very important to ensure the service performance of asphalt pavement under seasonal changes in temperature and loading. However, it is challenging to balance the improvement of such resistance by using additives, e.g., anti-rutting agent (ARA). This study focuses on improving the flexibility of anti-rutting asphalt mix by incorporating crumb rubber (CR) and ARA. The properties of the prepared modified asphalt mix were evaluated in the laboratory by performing wheel tracking, three-point bending, indirect tensile, and uniaxial compression tests. The experimental results showed that the dynamic stability of modified asphalt mix was significantly increased due to the addition of ARA and further improved by incorporating CR. The maximum bending strain at −10 °C was increased due to the contribution of CR. The results of indirect tensile strength and resilient modulus further indicated that the CR-modified anti-rutting mixture was more flexible. Moreover, the field observation and evaluation indicated that the CR-modified anti-rutting asphalt pavement met the standard requirements, better than normal asphalt mixture in many parameters. A conclusion can be made that incorporating CR in asphalt mixture prepared with ARA can improve pavement performance at both high and low in-service temperatures.

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