01521730

Component

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

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

The purpose of this review is to give an update of the current work on viscosity and residue recovery that has taken place at various laboratories and developed into standards at ASTM. Emulsified asphalts are complex fluids and their testing is complicated. Two of the most important tests for emulsified asphalt are viscosity and residue recovery. Reviews on emulsified asphalt technology and, in particular, the residue recovery procedures are published in two Transportation Research Board circulars: Asphalt Emulsion Technology (E-C102) and Asphalt Emulsion Technology: Review of Asphalt Emulsion Residue Procedures (E-C122). Many of the ASTM traditional test methods overlap with AASHTO test methods, and in many cases can be used interchangeably. This underlines an ongoing technical collaboration between these two organizations in a time of scarce resources and in relation to this most important topic for the pavement industry. In the past few years, two new standards have been developed at ASTM. One is a faster and more automated viscosity procedure using a digital rotational paddle viscometer (ASTM D7226). The other is a simple and automated emulsified residue recovery procedure using a moisture analyzer balance (MAB) (ASTM D7404). There are other residue recovery procedures but they are variations of distillation and oven evaporation procedures that are not automated and involve large sample size. ASTM and AASHTO (M140, M208) have specifications for emulsified asphalt. However, there is no ASTM standard for polymer-modified emulsified asphalt, whereas AASHTO does have the CRS-2L and CRS-2P specifications. The selection for various applications of emulsified asphalt is outlined in ASTM D3628.

01521731

English

pp 13-19

2014-1

Transportation Research Circular

Progress Toward Performance-Graded Emulsified Asphalt Specifications Workshop

Digital/other

Figures; Photos; References; Tables

Emulsified asphalt; Laboratory tests; Standards; Viscometers; Viscosity; Waste products (Materials)

ASTM International

Highways; Materials; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Apr 8 2014 7:46AM

• Asphalt Emulsion Residue Recovery Update
• Development of a More Rational System for Selecting Emulsions for Surface Treatments
• 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