This test method points out how defects of slurry surfacing can be visually assessed. Defects in slurry surfacing include bleeding and fatting up, delamination, loss of aggregate, wearing, lane joint gaps, rutting, slippage, corrugation, bumps and ridges, and groups of small defects or small repetitive defects.
They can be assessed in two ways: qualitatively and quantitatively.
A qualitative method will assess the rate of damage by simple rules. The quantitative method will measure the defects in much more detail.
The main objective of this four-year European research project (from 1st January 2009 through 31st December 2012; fifteen partners) conducted under FP7 was to maximize the reuse of reclaimed asphalt (RA) in bituminous mixtures, with as little downscaling of the material and as little use of new material as possible.
Ever since CEN/TC 227 Road Materials was formed in the late eighties, that is, before there were any plans to reorganize the standardization landscape in Belgium, BRRC has been a pioneer and an active participant in this committee. The main focus at the time was on the activities of WG1 Bituminous Mixtures and WG2 Surface Dressing, Sprays and Slurry Surfacing (incorporating Microsurfacing).
These test methods were developed to measure rates of spread on site, both longitudinally and transversely. The transverse measurements are used to check the operation of chipping and binder spreaders, and the longitudinal measurements to verify whether the rates declared by the contractor have actually been spread on site.