Study on Materials Composition Design of Asphalt Mixture in Upper Layer of Xisang Highway

2014 ◽  
Vol 599 ◽  
pp. 248-251
Author(s):  
Guo Fei Zhang ◽  
Wen Bo Zeng ◽  
Ping Ping Ding ◽  
Qing Hu Zhang
Keyword(s):  
Design Method ◽  
Asphalt Mixture ◽  
Strength Ratio ◽  
Stability Ratio ◽  
Marshall Test ◽  
Split Test ◽  
Wheel Tracking Test ◽  
Road Performance ◽  
Residual Stability ◽  
Wheel Tracking

In this paper, Marshall Design method and Bailey method were utilized to design the material composition of upper layer in Xisang highway, China. And its road performance was estimated by Marshall Test, freeze and split test, wheel tracking test and fatigue test. Under the designed graduation, the residual stability ratio, split strength ratio and dynamic stability are 89.3%, 88.0% and 7752 (times/mm) respectively and the results can meet the requirement of upper layer standard in China. It confirms that the designing process of materials composition is reasonable.

Utilization of Steel Slag as Aggregates for Porous Asphalt Mixture

2014 ◽  
Vol 599 ◽  
pp. 261-264 ◽  
Author(s):  
Can Hua Li ◽  
Xiao Dong Xiang ◽  
Xi Ying Zhou ◽  
Xiao Qian Tu
Keyword(s):  
Coarse Aggregate ◽  
Steel Slag ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Ratio Test ◽  
Strength Ratio ◽  
Stability Ratio ◽  
Porous Asphalt ◽  
Open Graded Friction Course ◽  
Residual Stability

Steel slag is a byproduct, making up a portion of 15-20% of iron output. Most of them are deposited in slag storing yards and thus results in many serious environment problems in China. This paper aims to explore the feasibility of utilizing steel slag as aggregates in porous asphalt mixtures. Open-graded friction course (OGFC), a permeable and porous asphalt mixture, was evolved in this paper. Residual stability ratio test, tensile strength ratio test, seepage test and rutting test got used in the research. Results showed that OGFC with steel slag as coarse aggregate had good performances.

Influence of Graduation on Road Performance of Fibers-Reinforced Asphalt Pavement

2013 ◽  
Vol 753-755 ◽  
pp. 754-757
Author(s):  
Feng Zhu ◽  
De Dong Guo
Keyword(s):  
Optimization Design ◽  
Asphalt Mixture ◽  
Aggregate Size ◽  
Maximum Aggregate Size ◽  
Temperature Property ◽  
The Road ◽  
Split Test ◽  
High Temperature Property ◽  
Road Performance ◽  
Residual Stability

Rutting test, residual stability test and freeze-thaw split test were used to measure the properties of asphalt mixture with different graduation and same mixing amount of fibers, the results were analyzed to obtain the influence of graduation types in the road performance of fiber-reinforced asphalt mixture. The results showed as follows: fibers could obvious improve the high temperature property and water stability of asphalt mixture; the graduation types have visible impact on the improvement of all properties of fibers-reinforced asphalt mixture; SMA-13 has the greatest influence in improving the performance of fibers-reinforced mixture; the improving effect of dense graduation AC mixture will gradually decrease when the nominal maximum aggregate size was becoming bigger; graduation optimization design should be used in mix design of fibers-reinforced mixture to enhance its road performance.

Experimental Study on Mix Ratio Design and Road Performance of Medium and Small Deformation Seamless Expansion Joints of Bridges

2021 ◽  
pp. 036119812098474
Author(s):  
Pengzhen Lu ◽  
Chenhao Zhou ◽  
Simin Huang ◽  
Yang Shen ◽  
Yilong Pan
Keyword(s):  
Traffic Safety ◽  
Performance Test ◽  
Asphalt Mixture ◽  
Small Deformation ◽  
Expansion Joint ◽  
Expansion Joints ◽  
Mixture Ratio ◽  
The Road ◽  
Marshall Test ◽  
Road Performance

Expansion joints are a weak and fragile part of bridge superstructure. The damage or failure of the expansion joint will lead to the decline of bridge durability and endanger the bridge structure and traffic safety. To improve the service life and performance of bridge expansion joints, the ideal method is to use seamless expansion joints. In this study, starting from the commonly used asphalt mixture gradation of seamless expansion joint, and taking into account the actual situation of bridge expansion joint structure and environment in China, the gradation and asphalt-aggregate ratio are preliminarily designed. Through a Marshall test, the corresponding asphalt mixture is evaluated and analyzed according to the stability, flow value, and void ratio, and the optimal gradation and asphalt-aggregate ratio are determined. Finally, the asphalt mixture is prepared with the mixture ratio design, and the test results of an immersion Marshall test, fatigue performance test, and full-scale test verify that the asphalt mixture meets the road performance requirements of seamless expansion joints. On the basis of the experimental data, the performance of large sample asphalt mixture is continuously tested, compared, and optimized. The results show that the asphalt mixture ratio designed is true and reliable, which can provide reference for the optimal design of seamless expansion joint filler.

scholarly journals Utilización de técnicas petrográficas para evaluar los efectos inducidos del NaCl, condiciones climáticas extremas y el paso del tráfico en las superficies de las carreteras españolas

2017 ◽  
Vol 67 (328) ◽  
pp. 138 ◽  
Author(s):  
A. P. Pérez-Fortes ◽  
M. J. Varas-Muriel ◽  
P. Castiñeiras
Keyword(s):  
El Paso ◽  
Asphalt Mixture ◽  
Polarized Light ◽  
Nacl Solution ◽  
Winter Maintenance ◽  
Traffic Conditions ◽  
Wheel Tracking Test ◽  
Wheel Tracking ◽  
Design Construction

The asphalt surface layer is the most exposed to weather and traffic conditions on roads, especially those subjected to winter maintenance. Therefore, a deep knowledge of the mechanisms which can damage this layer is necessary to improve its design, construction and long-term use. With this purpose, two types of asphalt mixtures used on roads from NW Spain were subjected to durability tests (freezing-thaw and thermal-stress) with a saturated NaCl solution. After the durability tests, a wheel tracking test was performed on the samples, and the resultant material was analyzed by optical polarized light and fluorescence microscopy. This analysis showed that the binder-aggregate low adhesion was the main responsible of the asphalt mixture damage. This damage was concentrated in the aggregates because the binder acted as an impermeable wall. Consequently, the NaCl solution penetrated and degraded the aggregates quickly and strongly.

An approach to investigate coarse aggregates movement of asphalt mixture based on wheel tracking test

2021 ◽  
Vol 309 ◽  
pp. 125161
Author(s):  
Wenchang Liu ◽  
Hongwei Lin ◽  
Hongyu Guo ◽  
Hongchao Zhang ◽  
Shuguang Zhang ◽  
...  
Keyword(s):  
Asphalt Mixture ◽  
Coarse Aggregates ◽  
Wheel Tracking Test ◽  
Wheel Tracking

Pavement Performance of Hot In-Place Recycling for Waste Asphalt Mixtures

2013 ◽  
Vol 668 ◽  
pp. 292-296
Author(s):  
Ya Li Ye ◽  
Chuan Yi Zhuang ◽  
Jia Bo Hu
Keyword(s):  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Pavement Performance ◽  
Test Results ◽  
Technical Parameters ◽  
Stable Performance ◽  
Wheel Tracking Test ◽  
Asphalt Content ◽  
Wheel Tracking

With the early asphalt pavements have been into the stage of medium maintenance or overhaul, recycling is a very important way for waste asphalt mixtures. A sample was taken in the expressway from Huhhot to Baotou, and the waste mixtures were extracted from field and sieved; so that the new aggregates can be determined and mix design was carried. With the aid of the penetration, the softening point and the viscosity in 135°C test, the quantity of the regenerant and the asphalt content were ascertained. Through the high temperature stable performance, the anti-low temperature performance, the water stability and the Hamburg wheel-tracking test, the appropriate gradation and the optimum asphalt content were determined. The test results showed that the pavement performance of the waste asphalt mixture was enhanced obviously with hot in-place recycling, and it has achieved technical parameters for old asphalt mixture.

Effect of a Chloride Deicing Additive on the Performance of Asphalt Mixture

2014 ◽  
Vol 1049-1050 ◽  
pp. 422-425
Author(s):  
Chao Peng ◽  
Jian Ying Yu ◽  
Jing Dai ◽  
Zhi Jie Zhao ◽  
Jing Yi Fu ◽  
...  
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Bending Test ◽  
Rutting Resistance ◽  
Weight Concentration ◽  
Splitting Test ◽  
Wheel Tracking Test ◽  
Beam Bending ◽  
Wheel Tracking ◽  
Test Result

Effect of a chloride deicing additive (Cl-DIA) on the performance of asphalt mixture was investigated by evaluating the moisture, cracking and rutting resistance. Freeze-thaw splitting test result showed that asphalt mixture containing Cl-DIA weakened moisture resistance to some extent but it was still applicable for asphalt pavement. Wheel-tracking test indicated that Cl-DIA evidently improved the rutting resistance of the asphalt mixture and the weight concentration of Cl-DIA in asphalt mixture had to exceed 3%. Beam bending test implied that Cl-DIA did not help for the cracking of the asphalt mixture.

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