Rheological and chemical characteristics of rubberized binders with non-foaming warm mix additives. (15th May 2016)

• Record Type: Journal Article
• Authors: Yu, Huayang; Leng, Zhen; Xiao, Feipeng; Gao, Zheming
• Is Part Of: Construction & building materials. Volume 111(2016)
• Page Start: 671
• Page End: 678
• Publication Date: 2016-05-15
• Subjects: Crumb rubber -- WMA -- Rheological properties -- Chemical analysis; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2016.02.066
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Various selected WMA additives had similar effects on AR's workability. Various selected WMA additives had different effects on AR's rheological properties. Using Evotherm-DAT and Sasobit together compromised the engineering performance of AR. Rubber compensated adverse effect of wax on low-temperature performance of asphalt. Incorporation of WMA additives affected the dissolution of crumb rubber in asphalt. Abstract: This study aims to investigate the rheological and chemical characteristics of asphalt rubber (AR) binders modified with four non-foaming warm mix asphalt (WMA) additives: Evotherm-DAT, Sasobit, conventional paraffin wax, and combined Evotherm-DAT and Sasobit. The main findings of this study include that: (1) all selected WMA additives are effective in enhancing AR's workability; (2) using combined Evotherm-DAT and Sasobit is not a viable option to reduce the construction temperature of AR mixture; (3) paraffin wax is a potential WMA additive for AR; and (4) WMA additives may affect the dissolution status of crumb rubber in base asphalt.