Indoor Research of High-Modulus Asphalt Concrete with the Added Calcium Sulfate Whisker

2011 ◽  
Vol 94-96 ◽  
pp. 90-94 ◽  
Author(s):  
Hong Guo Zhang ◽  
Pei Wen Hao ◽  
Xiu Shan Wang
Keyword(s):  
Calcium Sulfate ◽  
Asphalt Mixture ◽  
High Modulus ◽  
Highway Engineering ◽  
The Road ◽  
Research Designs ◽  
Mixed Material ◽  
Road Performance ◽  
Calcium Sulfate Whisker ◽  
Temperature Water

Abstract: This paper mainly studies the application effects of calcium sulfate whisker, a new kind of high-modulus and inorganic-modified material in asphalt mixture. According to the Marshall test, this research designs the ratio of the mixed material, so as to determine the mixed quantity of calcium sulfate whisker. Based on the related studies about road performance, it makes a comparative study among these three mixed materials. The results indicate that the high-modulus asphalt mixture with modified calcium sulfate whisker can effectively improve the mixed materials’ stability in high temperature, water stability and anti-fatigue performance; meanwhile, it doesn’t decrease their performance in low temperature. Therefore, it is helpful to solve the common problems in highway engineering, such as rutting, water damage and so on. The feasibility analysis proves that the application of high-modulus asphalt mixture with modified calcium sulfate whisker could achieve greater economic and social benefits while ensuring the good road performance of the road.

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 Synthesis and Effect of Encapsulating Rejuvenator Fiber on the Performance of Asphalt Mixture

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1266 ◽  
Author(s):  
Benan Shu ◽  
Shiwen Bao ◽  
Shaopeng Wu ◽  
Lijie Dong ◽  
Chao Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
The Self ◽  
Self Healing ◽  
Excellent Thermal Stability ◽  
The Road ◽  
Water Sensitivity ◽  
Road Performance ◽  
Temperature Water

The idea of prolonging the service life of asphalt mixture by improving the self-healing ability of asphalt has received extensive attention in recent years. In view of this, this work synthesized three kinds of encapsulating rejuvenator fibers to improve self-healing properties of asphalt mixtures. A series of characterizations were performed to study the morphology, chemical structure and thermal stability of the three kinds of fibers. Subsequently, the road performance of asphalt mixture containing the fiber were investigated, which included high and low temperature, water sensitivity and fatigue performances. Finally, the self-healing performance of asphalt mixture containing the fiber was investigated by 3PB test. The results revealed that the three kinds of encapsulating rejuvenator fibers were successfully synthesized. The fibers had excellent thermal stability, which met temperature requirements in the mixing and compaction process of asphalt mixtures. Road performance of asphalt mixture containing the fiber met the requirements. Self-healing ability of asphalt mixture containing the fiber was improved. Synergistic action of temperature and rejuvenator could further significantly improve the self-healing ability of the asphalt mixture.

scholarly journals Road Performance of Calcium Sulfate Whisker and Polyester Fiber Composite-Modified Asphalt Mixture

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Xiushan Wang ◽  
Bowen Dong ◽  
Junjie Wang
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Calcium Sulfate ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Polyester Fiber ◽  
High Temperature Stability ◽  
Modified Asphalt ◽  
Road Performance ◽  
Calcium Sulfate Whisker

In order to better improve the practical engineering problems such as rutting, cracking, pit, and groove in highway engineering, the stability and strength characteristics of calcium sulfate whisker and polyester fiber in asphalt mixture are evaluated based on the road performance test. In this experiment, three different methods of the calcium sulfate whisker content and three different polyester fiber content were used to determine the best asphalt aggregate ratio to prepare different modified asphalt mixture samples. Its high temperature stability, water stability, and low-temperature performance were tested. The results show that the composite modifier of calcium sulfate whisker and polyester fiber can significantly improve the strength stability of asphalt mixture and make its high temperature stability reach 2900.3∼4230.7 Times/mm without reducing its low-temperature bending strength. The optimum content of calcium sulfate whisker is in the range of 2‰∼2.5‰ and polyester fiber is in the range of 2‰∼3‰. The rutting strength and Marshall stability reach the maximum.

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.

Investigation of the Performance of Basalt Fiber Reinforced Asphalt Mixture

2020 ◽  
Vol 10 (5) ◽  
pp. 1561 ◽  
Author(s):  
Hua Zhao ◽  
Bowen Guan ◽  
Rui Xiong ◽  
Aiping Zhang
Keyword(s):  
Asphalt Mixture ◽  
Basalt Fiber ◽  
Polyester Fiber ◽  
Fiber Reinforced ◽  
The Road ◽  
Water Sensitivity ◽  
Temperature Performance ◽  
Splitting Test ◽  
Road Performance ◽  
Marshall Stability

This study is focused on the effect of basalt fiber on the road performance of the asphalt mixture. The road performance of asphalt mixture with different dosages of basalt fiber was comprehensively evaluated using Marshall Stability test, the wheel tracking test, the three-point bending beam test and the freezing-thaw splitting test. The road performance of lignin fiber reinforced asphalt mixture and polyester fiber reinforced asphalt mixture also were tested to compare with the road performance of basalt fiber reinforced asphalt mixture. The results showed that basalt fiber can enhance mechanical properties, the low-and high-temperature performance and water sensitivity of the asphalt mixture significantly. Considering the road performance and economic benefits, the appropriate dosage of basalt fiber is about 0.3%. Marshall Stability (MS), dynamic stability (DS), the maximum bending strain and the tensile strength ratio (TSR) of asphalt mixture with 0.3% basalt fiber were increased by 19.6%, 25.5%, 22.2% and 6.0%, respectively. Basalt fiber has certain advantages in improving the low-temperature performance of asphalt mixture by comparison with lignin fiber and polyester fiber.

scholarly journals Study on Laboratory Experimental Pavement Performances of SEAM Modified Asphalt Mixture

2019 ◽  
Vol 136 ◽  
pp. 03010
Author(s):  
Ma Qingna ◽  
Zhao Zhiqin ◽  
Xu Qian ◽  
Sun Feng
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Water Stability ◽  
High Temperature Stability ◽  
Modified Asphalt ◽  
The Road ◽  
Road Performance ◽  
Property Index

Adding sulphur dilution asphalt modifier SEAM to asphalt mixture is not only a modifier of asphalt mixture, but also an additive of asphalt mixture. When the modifier is added into the asphalt mixture, the road performance of the asphalt mixture can be improved. This paper studies SEAM modified asphalt mixture the Marshall property index, temperature stability, Water stability and fatigue feature in the Laboratory. On the based of the result of the experiment and analysis, SEAM can improve the high temperature stability, Water stability and fatigue feature. But the low temperature stability can’t improve.

Research on the Road Performance of the AC-25 Asphalt Mixtures

2012 ◽  
Vol 204-208 ◽  
pp. 1593-1598
Author(s):  
Hong Mei Li ◽  
Wen Fang Liu
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Central Layer ◽  
The Road ◽  
Road Performance ◽  
On The Road

In this paper, firstly, based on asphalt pavement central layer, the comparison with the foreign related gradation of asphalt mixtures, one typical kinds of gradations are decided; Secondly, the asphalt aggregate ratio is predicted based on professor Lin’s Theory , and five asphalt aggregate ratio are selected. Finally, the road performance of asphalt mixture is experimented, and the road performance of five asphalt aggregate ratio is analyzed. As a result, we can predict the range of the optimum asphalt aggregate ratio based on the road performance.

Research on Road Performance of Desulfurized Rubber Asphalt and Mixture

2014 ◽  
Vol 525 ◽  
pp. 546-551 ◽  
Author(s):  
Chun Wei Wang ◽  
Fei Wang ◽  
Wen Gang Zhang
Keyword(s):  
Shear Strength ◽  
Rubber Particle ◽  
Asphalt Mixture ◽  
Performance Testing ◽  
High Viscosity ◽  
Cohesive Strength ◽  
The Road ◽  
Swelling Mechanism ◽  
Road Performance ◽  
Asphalt Mortar

In order to discuss the road performance of desulfurized rubber asphalt and mixture, Swelling mechanism of desulfurized rubber asphalt was studied first, and then performance testing of KLMY90#, normal rubber asphalt and desulfurized rubber asphalt were taken, after that, penetration, shear strength and cohesive strength of desulfurized rubber asphalt mortar were test, road performance of desulfurized rubber asphalt mixture were test at last. The results of the study show that, there is no Rubber particle core, but lots of chemical reaction in desulfurized rubber asphalt; the performance of desulfurized rubber asphalt is better than normal rubber asphalt without high viscosity, easy isolation and poor high temperature storage stability; shear strength and cohesive strength of desulfurized rubber asphalt mortar is better; and desulfurized rubber asphalt mixture have good road performance.

The Analyze Study of Compacting Temperature and Road Performance of Warm Mix Asphalt Mixture (LEADCAP)

2013 ◽  
Vol 361-363 ◽  
pp. 1681-1688 ◽  
Author(s):  
Hai Sheng Zhao ◽  
Wei Chen ◽  
Xiao Yan Wang
Keyword(s):  
Low Temperature ◽  
Dynamic Modulus ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Organic Additive ◽  
Bending Test ◽  
High Temperature Stability ◽  
The Road ◽  
Indirect Tension ◽  
Road Performance

This paper used one kind of organic additive LEADCAP to reduce the compacting temperature of SBS WMA mixture, and compared the WMA mixture compacted by superpave gyratory compactor (SGC) with HMA mixture to determine the compacting temperature of WMA mixture. Rutting test, low temperature bending test, freeze-thaw indirect tension test, Hamburg Wheel-Track test and dynamic modulus were carried out to evaluate the road performance of WMA mixed with LEASCAP. The test result showed that the WMA mixed with LEADCAP had well performed high temperature stability, low temperature stability, water stability, rutting cracking resistance, and high dynamic modulus, the compacting temperature were 127 °C, and affectively reduced the compacting temperature of SBS WMA mixture.

Experimental Study on Foamed Asphalt Warm Mix Technology

2014 ◽  
Vol 919-921 ◽  
pp. 1110-1114
Author(s):  
Ying Biao Wu ◽  
Jin Jin Shi ◽  
Chen Fang Yang ◽  
Sheng Xia Song
Keyword(s):  
Evaluation Method ◽  
Asphalt Mixture ◽  
The Road ◽  
Foamed Asphalt ◽  
Outdoor Experiment ◽  
Road Performance ◽  
Cold Recycling ◽  
Lower Temperature ◽  
Specification Requirement ◽  
Better Than

Usually, foamed asphalt as cold recycling mixture binder, study on foamed asphalt warm mix technology was limited in China. Aimed at the asphalt foaming characteristic, the paper put forward the best asphalt foaming condition and carried out indoor and outdoor experiment to study the road performance of warm mixed asphalt mixture. The paper proposed the maturation curing time concept and its evaluation method. Results indicated that the warm mixed asphalt mixtures road performance can meet the HMA specification requirement in a lower temperature of construction, and low-temperature crack resistance was better than the tradition hot mix asphalt mixture so the warm mix foamed mixture has a remarkable economic and society benefit.

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