A New Method to Measure Viscosity of SBS Modified Asphalt - Rotational Plate Viscosity Test

被引：0
|
作者：
Luo H. [1 ,2 ]
Ouyang C. [1 ,2 ]
Xu J. [1 ,2 ]
Zheng P. [1 ,2 ]
Yang E. [1 ,2 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
[2] Key Laboratory of Highway Engineering of Sichuan Province, Southwest Jiaotong University, Chengdu
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2020年 / 23卷 / 03期
关键词：
Construction temperature; Road engineering; SBS modified asphalt; Shear rate; Viscosity; Warm mix asphalt;
D O I：
10.3969/j.issn.1007-9629.2020.03.034
中图分类号：
学科分类号：
摘要：
The construction temperature of the warm SBS modified asphalt is too high to use Brookfield viscosity test(BV) method. Therefore, rotational plate viscosity test(RPV) method with fixed shear rate was proposed to solve the problem. The two methods were used to determine the mixing and compaction temperature of SBS modified asphalt after adding three kinds of warming agents, which would guide the preparation of Marshall mixture test piece and the void ratio test. The results are as follows: RPV method can avoid the shear thinning effect effectively, which causes the construction temperature of SBS modified asphalt predicted by BV method was higher than the standard in China. Under the guidance of the construction temperature obtained by RPV method, volume design index of the mixture satisfies the standard very well and the cooling and energy saving performance of the warming agent is fully utilized. In addition, RPV method eliminates the trivial steps in BV method, where the speed and rotor need to constantly change to meet the test range. In the same time, the test efficiency of RPV method is about four times that of BV method, and the coefficient of variation is smaller. As for the viscosity-temperature performance test of 70# asphalt, the results from RPV method are no significantly difference as BV method(significance level α=0.05). RPV is expected to become a more efficient and accurate method in asphalt apparent viscosity measuring(especially SBS modified asphalt) and widely used in scientific research and engineering. © 2020, Editorial Department of Journal of Building Materials. All right reserved.
引用
收藏
页码：724 / 732
页数：8
相关论文
共 14 条
  • [1] ZHANG Zhengqi, LI Ningli, CHEN Huaxing, Determining method of mixing and compaction temperatures for modified asphalt mixture, Journal of Traffic and Transportation Engineering, 7, 2, pp. 36-40, (2007)
  • [2] GAN Xinli, ZHENG Nanxiang, HOU Yueqin, Et al., Determination of construction temperature of recycled SBS modified asphalt mixture, Journal of Building Materials, 18, 5, pp. 808-812, (2015)
  • [3] LI Ningli, LI Tiehu, CHEN Huaxing, Et al., Summarization onmethods in defining mixing and compaction temperatures for modified asphalt mixture, Materials Review, 8, pp. 92-95, (2007)
  • [4] MTURI G, ZOOROB S, O'CONNELL J., Effect of shear rate on bitumen viscosity measurements-Relevance to high temperature processing of bituminous products, 10th Conference on Asphalt Pavements, pp. 207-213, (2011)
  • [5] LI Ningli, LI Tiehu, CHEN Huaxing, Et al., Astudy on the viscosity and temperature properties of SBS modified asphalts, China Civil Engineering Journal, 40, 10, pp. 86-90, (2007)
  • [6] DEALY J M, VU T K P., The Weissenberg effect in molten polymers, Journal of Non-Newtonian Fluid Mechanics, 3, 2, pp. 127-140, (1977)
  • [7] BIRO S, GANDHI T, AMIRKHANIAN S., Determination of zero shear viscosity of warm asphalt binders, Construction & Building Materials, 23, 5, pp. 2080-2086, (2009)
  • [8] WEI Jianguo, WANG Zhaolun, FU Qilin, Determination method of warm mix asphalt mixture construction temperature, Journal of Chang'an University(Natural Science), 33, 6, pp. 16-21, (2013)
  • [9] BAHIA H U, .HANSON I, ZENG M, Et al., Characterization of modified asphalt binders in superpave mix design, (2001)
  • [10] YU Huaqian, Engineering fluid mechanics: Hydraulics, (2007)
12