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author:

Xiaoyan, Z. (Xiaoyan, Z..) [1] | Tao, J. (Tao, J..) [2] | AbdEi, H.A.O. (AbdEi, H.A.O..) [3] | Zhenliang, J. (Zhenliang, J..) [4] | Said, E. (Said, E..) [5]

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Abstract:

High viscosity asphalt (HVA) is a kind of asphalt modified with styrene-butadiene-styrene, plasticizer, and crosslinker. HVA is widely used in porous asphalt pavements around the world, especially in China and Japan. Most previous studies have focused on improving the performance of in-service HVA pavements at high and low temperatures. There is a need to ensure that HVA can also perform well at high temperature during construction to improve the workability of the mixture. The purpose of this study was to use warm-mix additives (WMA) to reduce viscosity during construction and keep acceptable performance at high and low temperatures. To accomplish this objective, three types of warm-mix additives (RH, EC-120, and Sasobit) with three different contents (2%, 3%, and, 4%) were mixed with HVA. An HVA without any WMA was used as a control sample. Physical tests conducted for each sample included viscosity (135°C), motive viscosity (60°C), penetration (25°C), softening point, ductility (5°C), tenacity (25°C), and toughness (25°C) before and after short-term ageing (thin film oven test). The test results show that the WMA additives have a significant effect on reducing viscosity 135°C) of HVA during construction, while substantially improving motive viscosity (60CC) with the addition of EC-120 and Sasobit. In addition, EC-120 improved toughness and tenacity. However, WMA had an adverse effect on low-temperature performance due to the reduction on ductility. The results show that EC-120 is considered as the optimal type among the three WMA and 3% is suggested as the best content of EC-120 for HVA. © 2017Canadian Society for Civil Engineering. All rights reserved.

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  • [ 1 ] [Xiaoyan, Z.]Fujian Agriculture and Forestry University, China
  • [ 2 ] [Xiaoyan, Z.]Fuzhou University, China
  • [ 3 ] [Tao, J.]Fuzhou University, China
  • [ 4 ] [AbdEi, H.A.O.]Carleton University, Canada
  • [ 5 ] [Zhenliang, J.]Fuzhou University, China
  • [ 6 ] [Said, E.]Ryerson University, Canada

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Proceedings, Annual Conference - Canadian Society for Civil Engineering

Year: 2017

Volume: 2017-May

Page: 198-206

Language: English

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ESI Highly Cited Papers on the List: 0 Unfold All

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30 Days PV: 5

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