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

Transcription

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

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

3 Past tenders and challenges faced

4 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

5 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

6 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

7 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

8 Rubble trends over the years and present status

9 Builders rubble to landfill trends 2003 thru Coastal Park Bellville Vissershok /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

10 Builders rubble to landfill trends 2003 thru Coastal Park Bellville Vissershok /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

11 Coastal Park Landfill present stockpile

12 Bellville Landfill present stockpile

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

14 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 materials in separate piles for further processing or sale eg. Asphalt, sand, clay, stone, concrete, pavers, bricks etc. FEE / MONTH (R) 12 ITEM 2 : CRUSHING Description : crushing coarse material (rubble, concrete, bricks, boulders etc) into crushed stone. The crushed material should be properly graded into G4/5 and/or G7/8, for onward sale. RATE / TON (R) ITEM 3 : PROCESSING EXISTING STOCKPILE Description : approximately m3 in stockpile RATE / TON (R)

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

16 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 t t BellvilleSouth landfill t 780 t Vissershok landfill t 900 t New Not verified Not verified

17 Coastal Park landfill commencement of tender

18 Coastal Park landfill processed material piles

19 Vision and challenges going forward

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

21 Thank You