01521734

Component

http://www.trb.org/Main/Blurbs/170143.aspx

http://www.trb.org/Publications/Blurbs/170143.aspx

To promote sustainability and optimize use of funding State Highway Agencies are integrating pavement preservation concepts into management of their road way network. Pavement preservation alternatives include chip seals, micro-surfacing, and slurry seals, traditionally these treatments have been successfully placed on low volume roads. However, as advancements in emulsion formulations continue and use of surface treatments on medium and high traffic facilities becomes more prevalent, there is a need to improve the methods used to select and specify emulsions. The objective of this study was to develop an emulsion testing framework that captures properties related to critical distresses observed for surface treatments that is capable of considering the effects of service conditions including traffic, environment, and aging. The proposed framework recommends use of the dynamic shear rheometer and bitumen bond strength test to evaluate high, intermediate, and low-temperature performance. The testing protocols were applied to recovered and pressure aging vessel-aged emulsion residues from emulsions formulated with different emulsifier chemistries and types of modification. Results indicate that the proposed test methods can characterize material performance and are sensitive to changes in emulsion formulation, however, additional research is needed to further develop test methods and to establish the relationship between laboratory-measured residue properties in order to define specification limits.

01521731

English

pp 20-37

2014-1

Transportation Research Circular

Progress Toward Performance-Graded Emulsified Asphalt Specifications Workshop

Web

Figures; Photos; References; Tables

Asphalt tests; Emulsified asphalt; Emulsions; Pavement distress; Properties of materials; Surface treating; Temperature; Test procedures; Testing equipment; Waste products (Materials)

Highways; Maintenance and Preservation; Materials; Pavements; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Apr 8 2014 8:11AM

• Asphalt Emulsion Residue Recovery Update
• Development of New Viscosity and Residue Recovery Standards at ASTM International
• Field Sampling and Testing of Death Valley Chip Seal Emulsion Residue: A Case Study
• Performance Evaluation of Chip Seals
• Techniques for Accelerating Recovery of Asphalt Emulsion Residues at 60°C by Using Thin Film Procedures and Test Methods Suited to the Limited Amount of Residue Obtained to Characterize the Recovered Binder
• Workshop Overview