Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/96003
Title: | Optimizing the mixing procedure of warm asphalt rubber with wax-based additives through mechanism investigation and performance characterization | Authors: | Leng, Z Yu, H Zhang, Z Tan, Z |
Issue Date: | 30-Jul-2017 | Source: | Construction and building materials, 30 July 2017, v. 144, p. 291-299 | Abstract: | Wax-based additives can be used as flow improvers to enhance the workability of asphalt rubber (AR). Conventionally, warm asphalt rubber (WAR) is produced by preparing AR first and then blending it with warm mix asphalt (WMA) additive. However, directly mixing WMA additive, base asphalt and crumb rubber together may save more energy since the early incorporation of WMA additive also helps decrease the production temperature of AR. To assess the feasibility of incorporating wax-based additives at an earlier stage, this study investigates the influence of the mixing procedure on WAR prepared by two wax-based additives, i.e., commercial Sasobit and conventional paraffin wax. Rheological tests on WAR revealed no significant difference between WARs prepared by different procedures. However, the direct mixing method led to worse WAR workability compared to the traditional mixing procedure. Chemical analysis on the liquid phase of WARs (crumb rubber removed) indicated that independent of the type of wax-based additive, there is less wax in the liquid phase of WARs when the additive is added earlier, which may be caused by the absorption of wax by crumb rubber during the interacting process. Thus, it is not recommended to replace the traditional mixing procedure with the direct mixing method. | Keywords: | Asphalt rubber Interaction Rheological property Warm mix asphalt Wax Workability |
Publisher: | Elsevier | Journal: | Construction and building materials | ISSN: | 0950-0618 | DOI: | 10.1016/j.conbuildmat.2017.03.208 | Rights: | © 2017 Elsevier Ltd. All rights reserved. © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ The following publication Leng, Z., Yu, H., Zhang, Z., & Tan, Z. (2017). Optimizing the mixing procedure of warm asphalt rubber with wax-based additives through mechanism investigation and performance characterization. Construction and Building Materials, 144, 291-299 is available at https://doi.org/10.1016/j.conbuildmat.2017.03.208. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Leng_Optimizing_Mixing_Procedure.pdf | Pre-Published version | 3.61 MB | Adobe PDF | View/Open |
Page views
33
Last Week
0
0
Last month
Citations as of May 19, 2024
Downloads
64
Citations as of May 19, 2024
SCOPUSTM
Citations
57
Citations as of May 17, 2024
WEB OF SCIENCETM
Citations
50
Citations as of Dec 21, 2023
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.