Beneficiation of Builders Rubble City of Cape Town PAST TO PRESENT - PowerPoint PPT Presentation

Beneficiation of Builders Rubble – City of Cape Town PAST TO PRESENT INFORMAL SETTLEMENTS,WATER AND WASTE SERVICES DIRECTORATE 9 th May 2018

BROAD OVERVIEW • Past tenders & challenges • Rubble trends over the years and present status (2003-2018) • Present tender and structure – 98S/16/17 • Vision and challenges going forward

Past tenders and challenges faced

2008 - Tender 1 Contract conditions • Crush builders rubble • Contractor paid CoCT monthly fee to use the site • Contractor had access to all material coming to Disposal site • Bellville Landfill was the test site - contract only ran at BLFS • Contractor was to find own market and could set own prices etc • Challenges • Operating costs > income achieved from sales • Catch 22 – costs to produce saleable stocks vs sales income from stocks (lag • period) Market demand fluctuations made it difficult to anticipate demand • Outputs were low to keep overheads down – negatively impacted on sales • Contractor folded up before tender term leaving stockpile of crushed • material on site at a loss

2011 – tender 2 Contract conditions • Crush builders rubble • No rental/occupation costs to contractor • Contractor had access to all materials coming to sites • Flexibility to roam to other sites on adhoc basis • No restrictions on market/prices to clients • Challenges • Contractor had inserted a qualification clause into the tender submission • (would only begin crushing/operations if the market was • conducive/receptive) Eventually after 6 months of the appointment the tender was cancelled •

Insights and inputs into new tender specifications Engagement with CoCT Infrastructure Management and Development • GreenCape - construction industry engagement & feedback • CoCT waste minimisation strategy • Lessons from past tenders •

2018 – tender 3 Contract conditions • Beneficiate construction and demolition waste/material by: • Separation (Sort new material entering site) • Crushing (coarse material) • Processing of existing stockpile (screen, pick, recover, crush, etc) • Targets set but can be reviewed/ certain flexibility • Zero rate or rate per ton of processed material “taken off site” • No Coct charges to contractor • Challenges • Building up stockpile whilst incurring operating costs • Heterogenous materials in stockpile • Marketing/networking • Grading processed material – G4-G7 •

Rubble trends over the years and present status

Builders rubble to landfill – trends 2003 thru 2018 900000 800000 700000 600000 500000 Coastal Park Bellville 400000 Vissershok 300000 200000 100000 0 3/4 4/5 5/6 6/7 7/8 8/9 9/10 10/11 11/12 12/13 13/14 14/15 15/16 16/17 17/18

Builders rubble to landfill – trends 2003 thru 2018 900000 800000 700000 600000 500000 Coastal Park Bellville 400000 Vissershok 300000 200000 100000 0 3/4 4/5 5/6 6/7 7/8 8/9 9/10 10/11 11/12 12/13 13/14 14/15 15/16 16/17 17/18

Coastal Park Landfill present stockpile

Bellville Landfill present stockpile

Present tender 2018 – Aggre8 (tender 98S/16/17)

2018 Tender specifications – price schedule PRICE SCHEDULE 1 – COASTAL PARK LANDFILL SITE Assume 1 m3 = 1 ton ITEM / DESCRIPTION UNIT QUANTITY UNIT RATE (EXCL. VAT) ITEM 1 : SEPERATION / SCREENING Description : new material coming in over the weighbridge. Keep like FEE / materials in separate piles for further 12 MONTH processing or sale eg. Asphalt, sand, clay, stone, concrete, pavers, bricks (R) etc. ITEM 2 : CRUSHING Description : crushing coarse RATE / material (rubble, concrete, bricks, TON (R) boulders etc) into crushed stone. The crushed material should be properly graded into G4/5 and/or G7/8, for onward sale. ITEM 3 : PROCESSING EXISTING RATE / STOCKPILE TON Description : approximately 120 000 (R) m3 in stockpile

2018 tender specifications - descriptors Item / activity Coastal Park Bellville South Vissershok Landfill Landfill Landfill Incoming mixed material Approximately Approximately Approximately 30 000 – 40 000 18 000 t /mth 20 000 t /mth t / mth Separation/Screening The breakdown of above incoming material is approximately – 50%, Sand/fines, 30% Mixed (brick, mortar, paving), 20% Concrete slabs/ lintels/ boulders Crushing Incoming mixed material consists of approximately 50% crushable material, consisting of 20% G4/5 suitable feed and 30% G7/8 suitable feed This This This approximates 15 approximates approximates 000-20 000t / 9 000t /mth 10 000t/mth mth Stockpile processing Approximately Approximately Approximately 120 000 36 000 m3(tons) 12 000 m3(tons) m3(tons) in in rubble in rubble rubble stockpile stockpile stockpile

2018 tender specifications – anticipated incoming Average Incoming tonnage of C&D material/waste (month/day) feb 2016 Disposal site Average tonnage Average tonnage received monthly received daily (2015/16 year) (2015/16 year) Coastal Park landfill 39 000 t 1 700 t BellvilleSouth landfill 18 000 t 780 t Vissershok landfill 21 000 t 900 t New Not verified Not verified

Coastal Park landfill – commencement of tender

Coastal Park landfill – processed material piles

Vision and challenges going forward

Vision Challenges Expertise, skills and experience Getting to know local conditions • • Understand C&D industry Establishing networks/contacts • • Well established in Gauteng Acclimatisation • • Create market need Market conditions • • Already graded product G5/G6 Sustainable quantities of material • • over term of tender Commitment to make it work • Test conditions and allocate • Target everything in C&D material • resources accordingly for re-use Meeting break even point asap • Large resource base • Buy in of Coct/Province for graded • Flexibility and co-operation • product use in infrastructure Create future potential • projects

Thank You