Refining particle size specification for asphalt emulsion. (3rd October 2022)

• Record Type: Journal Article
• Authors: Diaz-Romero, Pedro L.; Braham, Andrew F.
• Is Part Of: Construction & building materials. Volume 350(2022)
• Publication Date: 2022-10-03
• Subjects: Asphalt Emulsion -- Chip Seal -- Specification -- Particle Size -- Sweep Test -- Viscosity -- Sieve Test -- Storage Stability -- Sustainability; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2022.128812
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Recommended particle size for unmodified and modified cationic rapid set (CRS) asphalt emulsions were presented. Links to performance with aggregate and asphalt emulsion quality were analyzed. For CRS-2 asphalt emulsion, we recommend a mean particle size of 1.9 µm. For CRS-2L asphalt emulsion, we recommend a mean particle size of 3.0 µm. For CRS-2P asphalt emulsion, we recommend a mean particle size of 10.7 µm. Abstract: Preliminary particle size specifications have been developed on Cationic Slow Set (CSS) and Cationic Medium Set (CMS) emulsions. Therefore, there is a need for a particle size standard specification for asphalt emulsions that encompass Cationic Rapid Set (CRS) with additives such as solid polymer and latex polymer. This research links particle size metrics to quality-control tests and a performance test for CRS-2, CRS-2P, and CRS-2L asphalt emulsions. The moderate correlation between storage time, viscosity, and particle size led to recommend a mean particle size of 1.9 µm for CRS-2, 3.0 µm for CRS-2L, and 10.7 µm for CRS-2P.