Study of High Temperature Performance and Low Temperature Property on Layered Silicate Modified Asphalt Concrete

Abstract

Montmorillonite (MMT), a typical layered silicate, has been widely used to prepare modified asphalt. This paper investigates the high temperature performance and low temperature property on layered silicate modified asphalt concrete. The control concrete is prepared by base asphalt. Meanwhile, three-point bending, conventional and SHRP rutting tests are used to compare the properties of the two types of asphalt concrete. The results of conventional and SHRP rutting tests show that the modified asphalt concrete exhibits a better high temperature performance than the control concrete. And the maximum bending strength of modified asphalt concrete is higher than that of control concrete at the same temperature. It can be concluded that both the high temperature performance and low temperature property of asphalt concrete has been improved efficiently by utilization of layered silicate modified asphalt.

Low-Temperature Performance and Evaluation Index of Gussasphalt for Steel Bridge Decks

“…Fan et al [13] evaluated the low-temperature performance of asphalt concrete using a semicircle bending (SCB) test. Wu et al [14] analyzed the high-temperature performance and low-temperature performance of layered silicate modified asphalt concrete with a three-point bending test, rutting test, and SHRP rutting test. Gao et al [15] used indirect tensile tests to evaluate the low-temperature performance of asphaltconcrete containing basalt fiber.…”

Study on Low-Temperature Properties of Self-Monitoring Asphalt Concrete

“…With the self-diagnosis function of the self-monitoring asphalt concrete, we can evaluate the health status of pavement according to feedback on the electrical signals when it is under variation load. [1][2][3][4][5][6] Cold regions in the north, due to sharp changes in temperature, excessive cooling rate will make the asphalt concrete stress too late to relax and it will have a large accumulation of stress. When the accumulated stress caused by temperature change is higher than the ultimate tensile strength of the material, the pavement will microcrack until the pavement cracking.…”