Research on the Influence Factors of Low-Temperature Crack Resistance of Semiflexible Pavement Materials Based on Freezing TestSource: Journal of Highway and Transportation Research and Development (English Edition):;2020:;Volume ( 014 ):;issue: 003DOI: 10.1061/JHTRCQ.0000740Publisher: ASCE
Abstract: To study the influence factors of low-temperature performance of semiflexible pavement materials, a freezing test was conducted, and the cracking temperature was used as the evaluation index to study the influence of asphalt type (90 matrix asphalt, SBS-modified asphalt, TPS high-viscosity modified asphalt), cement-based grout material types (ordinary grout, rubber powder grout, emulsified asphalt grout), and skeleton void ratio (20%, 24%, 28%, 32%) on the low-temperature performance of semiflexible pavement materials. Results indicate that the freezing test can effectively distinguish the low-temperature crack resistance improvement benefits of semiflexible pavement materials with different asphalt, cement-based grouting materials, and skeleton void ratios. Cracking temperature can effectively evaluate the low-temperature performance of semiflexible pavement materials. The substrate void ratio is in the range of 20%–32%, and the cracking temperature changes with the increase in the substrate void ratio, decreasing initially and then rising. When the void ratio is around 24%, the best low-temperature performance of semiflexible materials is achieved. The improvement effect of the elasticity of grout on the low-temperature crack resistance of semiflexible pavement materials is obvious; the improvement effect of emulsified asphalt grout on the low-temperature performance of semiflexible pavement materials is better than that of rubber powder grout. After the modified asphalt is used in the substrate, the cracking temperature is reduced by 31.4%–38.3%, which is much greater than the effect of grouting. At the same time, the elasticity of the base asphalt is more effective than the viscosity increase in improving the low-temperature crack resistance of semiflexible materials.
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contributor author | Li-ming Wang | |
contributor author | Hai-wen Juan | |
date accessioned | 2022-01-30T21:20:28Z | |
date available | 2022-01-30T21:20:28Z | |
date issued | 9/1/2020 12:00:00 AM | |
identifier other | JHTRCQ.0000740.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4268032 | |
description abstract | To study the influence factors of low-temperature performance of semiflexible pavement materials, a freezing test was conducted, and the cracking temperature was used as the evaluation index to study the influence of asphalt type (90 matrix asphalt, SBS-modified asphalt, TPS high-viscosity modified asphalt), cement-based grout material types (ordinary grout, rubber powder grout, emulsified asphalt grout), and skeleton void ratio (20%, 24%, 28%, 32%) on the low-temperature performance of semiflexible pavement materials. Results indicate that the freezing test can effectively distinguish the low-temperature crack resistance improvement benefits of semiflexible pavement materials with different asphalt, cement-based grouting materials, and skeleton void ratios. Cracking temperature can effectively evaluate the low-temperature performance of semiflexible pavement materials. The substrate void ratio is in the range of 20%–32%, and the cracking temperature changes with the increase in the substrate void ratio, decreasing initially and then rising. When the void ratio is around 24%, the best low-temperature performance of semiflexible materials is achieved. The improvement effect of the elasticity of grout on the low-temperature crack resistance of semiflexible pavement materials is obvious; the improvement effect of emulsified asphalt grout on the low-temperature performance of semiflexible pavement materials is better than that of rubber powder grout. After the modified asphalt is used in the substrate, the cracking temperature is reduced by 31.4%–38.3%, which is much greater than the effect of grouting. At the same time, the elasticity of the base asphalt is more effective than the viscosity increase in improving the low-temperature crack resistance of semiflexible materials. | |
publisher | ASCE | |
title | Research on the Influence Factors of Low-Temperature Crack Resistance of Semiflexible Pavement Materials Based on Freezing Test | |
type | Journal Paper | |
journal volume | 14 | |
journal issue | 3 | |
journal title | Journal of Highway and Transportation Research and Development (English Edition) | |
identifier doi | 10.1061/JHTRCQ.0000740 | |
page | 7 | |
tree | Journal of Highway and Transportation Research and Development (English Edition):;2020:;Volume ( 014 ):;issue: 003 | |
contenttype | Fulltext |