The Asphalt Academy published TG 4 — Water Quality for Use in Test Labs, part of the Technical Guideline (TG) series for the bituminous products industry.
The guideline is available as a PDF (268.74 KB):
See also the other guidelines in the TG series — TG1 (modified bituminous binders in road construction — currently under review; contact Sabita), TG2 (bitumen stabilised materials) and TG3 (asphalt reinforcement for road construction).