REDUCING CONSTRUCTION & DEMOLITION WASTE

1. REDUCING CONSTRUCTION & DEMOLITION WASTE 1

2. Topics Covered: • Needs to reduce C&D material • The Waste Reduction Task Force for the Construction Industry : Public fill management, construction techniques, specifications and standards, and education and training • WBTC, Trip-ticket system & WMP • Good waste reduction practice 2

3. Inert Material Non-inert Material Public Fill (80%) Construction and Demolition Waste (20%) Waste from Construction Industry e.g. bamboo, plastic, timber, packaging waste and other organic material e.g. rocks, concrete, asphalt, rubble, bricks, stones and earth 3

4. 2001 Daily “C&D Material” Arisings in Hong Kong Public Filling Area (32,430 tpd) Public Fill (32,430 tpd) C&D Material (38,840 tpd) Mixed C&D Material (6,410 tpd) Public Fill Landfill (6,410 tpd) C&D Waste 4 Courtesy of Mouchel Asia Limited

5. Solid Waste Disposed at Landfills Municipal Solid Waste 9,300 tpd(55%) Construction & Demolition Waste 6,410 tpd(38%) Special Waste 1,110 tpd (7%) In 2001, 16,820 tonnes of solid waste were disposed of at landfills every day 5

6. Strategic Landfills NENT Landfill (1995) WENT Landfill (1993) SENT Landfill (1994) 6

7. Waste Reduction Framework Plan : Launched in November 1998 Objectives • Promote waste minimisation and resource recovery • Prolong landfill life • Optimise waste management costs 7

8. Waste Reduction Committee Waste Reduction Task Forces Public Housing Sector Private Housing Sector Government Hotels Airport Community Construction Industry Recycling Trade 8

9. Membership Professional bodies, academia, project clients & developers, contractors, consulting engineers and government Public Fill Management Construction Techniques, Specifications and Standards Education and Training Waste Reduction Task Force for the Construction Industry 9

10. Use of public fill in reclamation Public Fill Management • Expedite the planned reclamation projects • Maximise use of public fill in reclamations 10

11. Optimise cut and fill Excavated material stockpiled for reuse Set up bufferstorage area and ‘fill bank’ Public Fill Management Excavated material stockpiled for reuse 11

12. Public Filling Management Construction Waste Recycling Facility at SENT landfill • Construction Waste Sorting and Recycling Facility Temporary sorting plant at TKO Area 137 12

13. Construction Techniques, Specificationsand Standards • Planning and Design • Prefabrication Precast facade Prefabricated struts 13 Off-site R-bar prefabrication

14. Construction Techniques, Specificationsand Standards Sprayed plaster • Construction & Management • Sprayed plaster Sprayed plaster equipment 14

15. Construction Techniques, Specificationsand Standards • Construction & Management • Material management Proper storage of building materials On-site control of material by the headquarter using IT technology 15

16. Construction Techniques, Specificationsand Standards • Construction & Management • Waste sorting Waste paper collection trolley 16

17. Construction Techniques, Specificationsand Standards • Construction & Management • Traditional construction technique Traditional insulated pipe installation Waste generated from traditional insulated pipe installation 17

18. Construction Techniques, Specificationsand Standards • Construction & Management • Low waste construction technique Pre-insulated pipe Jointing by injection foaming 18 Fabricated insulated air duct

19. Construction Techniques, Specificationsand Standards • Construction & Management • Metal formwork System formwork 19

20. Construction Techniques, Specificationsand Standards • Construction & Management • Metal formwork Aluminum formwork 20

21. 建造技術、規格及標準 • 其他措施 • 循環顆粒材料用作填料;粒料用作混凝土材 料用途 Construction Techniques, Specificationsand Standards • Other measures • Reuse debris, rubble, sand, rocks, concrete, tiles and bricks for backfilling; recycled aggregate used for concrete manufacturing 21

22. Education and Training • Target • Developers / Manager • Professional (Architects, engineers, etc.) • Technicians • Workers 22

23. Waste Management Plan Specification Allowing the Use of Recycled inert Construction and Demolition Material WBTC No. 29/2000 WBTC No. 31/2000 WBTC No. 2/93 & 93A Public Dumps WBTC No. 2/93B Public Filling Facilities WBTC No.14/94 Use of PFA as General Fill in Reclamation WBTC No. 2/97 Use of PFA in Concrete Pile Caps and Substructures WBTC No. 4/98 Use of Public Fill in Reclamation and Earth Filling Projects WBTC No. 5/98 On-site Sorting of Construction Waste on Demolition Sites WBTC No. 5/99 Trip-ticket System for Disposal of Construction and Demolition Material WBTC No. 5/99A Trip-ticket System for Disposal of Construction and Demolition Material WBTC No. 19/99 Metallic Site Hoardings and Signboards WBTC No. 25/99 Incorporation of Information on Construction and Demolition Material Management in Public Works Subcommittee Papers WBTC No. 25/99A Incorporation of Information on Construction and Demolition Material Management in Public Works Subcommittee Papers (Amendment 1) WBTC No.12/2000 Fill Management Works Bureau Technical Circulars C&D material Management 23

24. Trip Ticket : WBTC no.5/99 Application Public fill : Secretary of Public Fill Committee(CED) Generate not more than 100,000 cum: exempted C&D waste : PEPO of Facilities Management Group/EPD Generate not more than 50 cum: exempted 24

25. A Sample Trip Ticket 25

26. Key Requirements of Waste Management Plan • Types, quantities and qualities of wastes • Timing of waste arising • Measures for reducing waste generation • On-site waste sorting • On-site and off-site reuse • Areas for waste storage • Quantities of wastes requiring off-site disposal • Disposal outlets • Monitoring and auditing program • e.g. trip-ticket system etc. • Organisation structure for waste management 26

27. Site Practice for Waste Reduction • Construction material management • On site waste sorting • Reuse and recycle • Final disposal 27

28. Construction material management • Order the right amount of raw material at the right time • Store material in allocated area with suitable protective measures • Collect the exact amount of materials and return the surplus to stock • Maximise the utilisation of materials • Avoid unnecessary use and cutting • Consider offcuts for sections when small lengths are required 28

29. Sort and segregate inert and non-inert materials Sort and segregate materials such as paper, plastic, timber, metals, masonry, concrete and excavated spoil On site waste sorting 29

30. Balance cut and fill in site Reuse items such as hoardings, formworks, scaffoldings and trench support Reuse debris, rubble, sand, rock, concrete, tile and brick for backfilling Recycle the following materials: paper, paperboard, packaging material, plastics, timber, metals, concrete, rocks & sand. Reuse and recycle 30

31. Reuse public fill at public filling areas for reclamation Dispose of non-recyclable C&D waste at landfills Adopt trip-ticket system to avoid fly-tipping and to ensure waste is disposed of properly. Final Disposal 31

32. Technical Support from EPD • The Recycling Hotline Tel: 2755 2750 • Website: http://www.info.gov.hk/epd/waste/cdm • Statistics on waste recycling • Lists of local recyclable material collectors and recyclers • Information leaflets and guidance materials • videos, posters and leaflet etc. 32