TRB WORKSHOP 153 SOUTH AFRICAN HIGHWAY .
SOUTH AFRICAN HIGHWAY TECHNOLOGY AND PRACTICE Photo Mr Gerrie van Zyl Director PD Naidoo Associates. Definition ... grit/ sand seal slurry seal. Seal Type Distribution Western Cape annual seal programme (6 – year average) Slurry Seals, 7% Rejuvenation, 13% Asphalt, 2% Double seals, 5%