Closing the loop on builders’ rubble through concrete innovation

Concor Infrastructure recycled 77,000 m3 of concrete waste during the expansion of the City Deep container terminal in Johannesburg, exceeding a 24% landfill diversion target. By using High volume pulverized flue ash concrete (HVPFAC) and Geopolymer concrete—the latter reducing greenhouse gas emissions by up to 90%—the project saved R10.8 million in virgin material costs and avoided R23 million in landfill gate fees.

• Concor Infrastructure managed the 2000 m2 expansion and 144 000 m2 resurfacing of the City Deep container terminal, which produced 77 000 m3 of concrete waste. While the project brief required a 24% diversion from landfill, Concor Infrastructure recovered, recycled, and re-engineered 100% of the concrete waste (77 000 m3) for use in the project.
• The project utilized two innovative concrete production solutions to re-engineer recovered materials: High volume pulverized flue ash concrete (HVPFAC), which uses mineral slag and fuel ash from coal-powered plants to lower greenhouse gas emissions, and Geopolymer concrete, a "cement-less" alternative using industrial byproducts that can save up to 90% of greenhouse gas emissions compared to traditional concrete and offers superior strength.
• The implementation of these concrete innovations resulted in R10.8 million in savings on virgin material costs and the avoidance of R23 million in landfill gate fees.

APA

Barnes, K. (2018). Closing the loop on builders’ rubble through concrete innovation. GreenCape. https://greencape.co.za/wp-content/uploads/2022/10/CONCOR-CASE-STUDY-2-3.pdf

Chicago

Barnes, Kirsten. Closing the loop on builders’ rubble through concrete innovation. GreenCape, 2018. https://greencape.co.za/wp-content/uploads/2022/10/CONCOR-CASE-STUDY-2-3.pdf.

Wikipedia

{{cite report |last1=Barnes |first1=Kirsten |title=Closing the loop on builders’ rubble through concrete innovation |publisher=GreenCape |date=September 2018 |url=https://greencape.co.za/wp-content/uploads/2022/10/CONCOR-CASE-STUDY-2-3.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{barnes2018closing, author = {Barnes, Kirsten}, title = {{Closing the loop on builders’ rubble through concrete innovation}}, institution = {GreenCape}, year = {2018}, month = sep, url = {https://greencape.co.za/wp-content/uploads/2022/10/CONCOR-CASE-STUDY-2-3.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }