Repurposing builders’ rubble & other secondary materials

A case study on Iselula Crushing in Blackheath, Cape Town, detailing the processing of builders' rubble into construction aggregates and the diversion of waste from landfills.

• Iselula Crushing processes between 5,700 and 22,000 m3 of builders' rubble monthly from local construction and demolition firms, converting concrete, bricks, and mortar into G4, G5, G7, G9, and kerbmix aggregates. External sales of these aggregates range from 1,800 to 20,000 m3 per month.
• The operation diverts between 5,700 and 22,000 m3 of waste from landfills every month, resulting in monthly landfill space savings for suppliers valued between R980,000 and R3.8 million.
• The facility supports employment through 32 formal staff positions and 14 informal business opportunities. Secondary materials such as metal, tyres, timber, PVC pipes, and bricks are recovered and sold or repurposed by Iselula and community members.

APA

Barnes, D. K. (2018). Repurposing builders’ rubble & other secondary materials. GreenCape. https://greencape.co.za/wp-content/uploads/2022/10/ISELULA-CRUSHING-CASE-STUDY-Final-5-11-2018-3.pdf

Chicago

Barnes, Dr. Kirsten. Repurposing builders’ rubble & other secondary materials. GreenCape, 2018. https://greencape.co.za/wp-content/uploads/2022/10/ISELULA-CRUSHING-CASE-STUDY-Final-5-11-2018-3.pdf.

Wikipedia

{{cite report |last1=Barnes |first1=Dr. Kirsten |title=Repurposing builders’ rubble & other secondary materials |publisher=GreenCape |date=July 2018 |url=https://greencape.co.za/wp-content/uploads/2022/10/ISELULA-CRUSHING-CASE-STUDY-Final-5-11-2018-3.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{barnes2018repurposing, author = {Barnes, Dr. Kirsten}, title = {{Repurposing builders’ rubble \& other secondary materials}}, institution = {GreenCape}, year = {2018}, month = jul, url = {https://greencape.co.za/wp-content/uploads/2022/10/ISELULA-CRUSHING-CASE-STUDY-Final-5-11-2018-3.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }