DiepKloof Bridge
Constructed in 1980

The bridge carries the N1 freeway over a minor road and was constructed in 1980. The reinforcing strips are 60x5mm mild steel, high adherence, hot dip galvanized with yield stress – 250MPA and ultimate stress – 350 MPA

The durability of the reinforcing strips was monitored after 11 years and again after 37 years.

In 2017 the average loss of thickness after cleaning was 15 microns per side and 10 microns per side after stripping of zinc. No pitting corrosion or loss of strength was evident.

Project details:

Client: NTC/SANRAL

Consulting Engineer: BKS/AECOM

Contractor: LTA

Sub-contractor: Aquacrete