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Investigation of High Temperature Performance and Viscosity Characteristics of Modified and Unmodified Color Asphalt
Experimental Techniques ( IF 1.5 ) Pub Date : 2021-10-25 , DOI: 10.1007/s40799-021-00507-8
C. Chen 1, 2 , H. Wu 1, 2 , W. Zhang 1 , Y. Mao 1 , C. Zhang 3
Affiliation  

The performance of the color asphalt binder plays an essential role in the performance of asphalt concrete, especially for color durability and high-temperature stability. The color pavement is particularly prone to fading, rutting, crowding, and other diseases during service time. Based on this idea, firstly, this study aims to mix four different color asphalts with pigments, which were tested by the rotating thin film oven test (RTFOT) and the pressure aging vessel (PAV) test for short-term and long-term aging. The primary purpose of this study is to describe the high-temperature performance and temperature sensitivity. A certain amount of styrene–butadiene–styrene block copolymer (SBS) was respectively added to the light-color asphalt and base asphalt. The viscosity and rheological properties were tested under different temperatures using Brookfield rotating viscometer. The rheological properties were tested under different temperatures by dynamic shear rheometer. The test results indicated that the four kinds of color asphalt had the same weakening trend of the color vividness index (P) after RTFOT and PAV aging. The SBS modifier can improve the bonding performance of the compound color asphalt and Ke La Ma Yi. The apparent viscosity of the eight asphalts decreases as the temperature increases. The shear rate had a more significant influence on the viscosity of the modified asphalt. For the same kind of asphalt, under the same temperature condition (135 °C, 145 °C, 155 °C, 165 °C, 175 °C), the percentage of viscosity change in the adjacent shear speed range gradually increases.



中文翻译:

改性和未改性彩色沥青的高温性能和粘度特性研究

彩色沥青结合料的性能对沥青混凝土的性能起着至关重要的作用,尤其是颜色耐久性和高温稳定性。彩色路面在使用期间特别容易出现褪色、车辙、拥挤等病害。基于这一想法,本研究首先将四种不同颜色的沥青与颜料混合,通过旋转薄膜烘箱试验(RTFOT)和压力老化容器(PAV)试验进行短期和长期老化测试。 . 本研究的主要目的是描述高温性能和温度敏感性。在浅色沥青和基础沥青中分别加入一定量的苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)。使用 Brookfield 旋转粘度计在不同温度下测试粘度和流变性能。采用动态剪切流变仪测试了不同温度下的流变性能。测试结果表明,4种彩色沥青经过RTFOT和PAV老化后颜色鲜艳度指数(P)的减弱趋势相同。SBS改性剂可提高复合彩色沥青与克拉玛依的粘结性能。八种沥青的表观粘度随温度升高而降低。剪切速率对改性沥青黏度的影响更为显着。对于同种沥青,在相同温度条件下(135℃、145℃、155℃、165℃、175℃),相邻剪切速度范围内的粘度变化百分比逐渐增大。

更新日期:2021-10-26
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