摘要
Ultraviolet aging of porous asphalt concrete is more serious than that of dense-grade concrete,attributing to its relatively high air void structure. And Tafpack-Super (TPS) is widely used as an asphalt viscosifier. For the purpose of determining the effect of TPS content on resistance to ultraviolet aging,TPS powder was added to base asphalt in various weight ratios (0%,4%,8%,12% and 16%). After mixing,the loose mixtures were short-term aged and then put in the Indoor Accelerated Ultraviolet Radiation Aging Oven for several particular times and then were compacted by Gyratory Compactor at 20%±2% air void. The specimens were tested and recorded by means of indirect tensile strength (ITS) to quantify the aging extent. The results show that 8% TPS by weight is the optimum content of base asphalt on resistance to ultraviolet aging. And the ITS of mixtures with different binder reach a peak value for approximately 2 h ultraviolet irradiation.
Ultraviolet aging of porous asphalt concrete is more serious than that of dense-grade concrete,attributing to its relatively high air void structure. And Tafpack-Super （TPS） is widely used as an asphalt viscosifier. For the purpose of determining the effect of TPS content on resistance to ultraviolet aging,TPS powder was added to base asphalt in various weight ratios （0%,4%,8%,12% and 16%）. After mixing,the loose mixtures were short-term aged and then put in the Indoor Accelerated Ultraviolet Radiation Aging Oven for several particular times and then were compacted by Gyratory Compactor at 20%±2% air void. The specimens were tested and recorded by means of indirect tensile strength （ITS） to quantify the aging extent. The results show that 8% TPS by weight is the optimum content of base asphalt on resistance to ultraviolet aging. And the ITS of mixtures with different binder reach a peak value for approximately 2 h ultraviolet irradiation.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第17期206-209,共4页
Journal of Wuhan University of Technology
基金
Department of Transportation in Hubei Province, China and Headquarters of Ma-Wu Expressway in Hubei Province for its financial support of this work.
