Effects of Polymer Modified Asphalt Emulsion (PMAE) on Pavement Reflective Cracking Performance

2012 ◽  
pp. 879-888 ◽  
Author(s):  
Yu Chen ◽  
Gabriele Tebaldi ◽  
Reynaldo Roque ◽  
George Lopp
Keyword(s):  
Reflective Cracking ◽  
Asphalt Emulsion ◽  
Modified Asphalt ◽  
Cracking Performance ◽  
Polymer Modified Asphalt

Georgia Department of Transportation’s Experience with Microsurfacing

1998 ◽  
Vol 1616 (1) ◽  
pp. 42-46 ◽  
Author(s):  
Donald Watson ◽  
David Jared
Keyword(s):  
Department Of Transportation ◽  
Asphalt Emulsion ◽  
Modified Asphalt ◽  
Crack Sealing ◽  
Traffic Volumes ◽  
Henry County ◽  
Heavy Truck ◽  
Double Surface ◽  
Polymer Modified Asphalt ◽  
Pavement Noise

Microsurface mix, or microsurfacing, can be used for sealing and providing a friction surface for cracked and deteriorated surface mixes. This mix, essentially consisting of 9.5-mm (0.37-in.) screenings bonded by a polymer-modified asphalt emulsion, is economical and can be placed very swiftly. Microsurfacing is also aesthetically pleasing because of its resemblance to hot-mix asphalt. In 1990–1991, the Georgia Department of Transportation (GDOT) successfully used microsurfacing in a test section on I-75 in Henry County, which had high traffic volumes and a heavy truck concentration. Two varieties of the mix were used, and both showed little deterioration after 2 years. In 1996, GDOT opted to use microsurfacing for a 9.2-km (5.7-mi) section of I-285 in Atlanta between Conley Road and Old National Highway. This 92 lane-km (57-lane-mi) project was initiated to address the raveling and cracking in the section and improve its appearance before the 1996 summer Olympics. The I-285 project began in late May 1996 and was completed in 1 month. The microsurfacing used on I-285 has performed quite well since the project was completed. No additional problems with raveling or load cracking have been encountered. The mix has provided excellent smoothness and good friction, with a minimal increase in pavement noise levels. Microsurfacing may be suitable for use on cracked pavements in lieu of more conventional rehabilitation methods such as crack sealing, leveling, and double surface treatments.

Effect of Warm Mix Addictive EC120 on Asphalt Performance

2014 ◽  
Vol 694 ◽  
pp. 123-126
Author(s):  
Xian Yuan Tang ◽  
Jia Xi Deng ◽  
Hong Bo Zhang ◽  
Jie Xiao
Keyword(s):  
High Temperature ◽  
Softening Point ◽  
Temperature Stability ◽  
Performance Tests ◽  
High Temperature Stability ◽  
Modified Asphalt ◽  
Paving Asphalt ◽  
Cracking Performance ◽  
Polymer Modified Asphalt ◽  
Asphalt Performance

In order to study the effect of warm mix addictive EC120 on asphalt performance, tests on asphalt density, penetration degree, softening point and ductility were carried out through adding various contents of EC120 to 70# paving asphalt (A grade) and SBS I-D polymer modified asphalt. The results indicate that when adding 3% content of EC120, the modification effect for these two kinds of asphalts is the best. The penetration degree of 70# paving asphalt decreases greatly than that for SBS polymer modified asphalt, but softening point increases small. The warm mix agent EC120 can improve the high-temperature stability and low-temperature anti cracking performance of asphalt. It has wide application prospect.

scholarly journals Preparation and Performance Assessment of Asphalt Emulsion Modified by the Fabricated SBS Latex

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Rui He ◽  
Yingping Liang ◽  
Lining Gao ◽  
Huaxin Chen ◽  
Ben Yang ◽  
...  
Keyword(s):  
Performance Assessment ◽  
Surface Treatments ◽  
New Method ◽  
Asphalt Emulsion ◽  
Modified Asphalt ◽  
Tyndall Effect ◽  
Mass Ratios ◽  
The Common ◽  
Polymer Modified Asphalt ◽  
And Performance

Polymer modified asphalt emulsion (PMAE) has recently been proven to be one of the most effective methods to overcome the common distress of asphalt surface treatments, such as abrasion, rutting, ravelling, and poor durability. Because of the limited research studies about the preparation of PMAE using SBS latex, a new method to prepare SBS latex was developed and the feasibility of using it in preparing SBS latex modified asphalt emulsion (SBS-LMAE) was verified in this study. The optimized swelling parameters for linear SBS solutions were swelling 24 h at the temperature of 50°C with the toluene/SBS (T/S) mass ratios of 2.5 : 1 to 2.0 : 1 which was determined according to the analysis of viscosity and Tyndall effect. After that, the SBS latex with favorable dispersivity and stability was successfully fabricated with the T/S ratio of 2.0 : 1. At last, the well-specified SBS-LMAE was prepared using the fabricated latex and tested for its conventional performances and microstructure. The results show that the SBS-LMAE samples all meet the main requirements of PMAE for microsurfacing and possess appropriate uniformity and stability.

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