Reuse, Reduction and Recycle of Construction and Demolition Waste Construction and Demolition Waste
My Presentation
• What is Construction and Demolition Waste
• Challenges
• Management Strategy
• Management Strategy
• Reduce
• Reuse
• Recycle
• Recommendation
My Presentation
• What is Construction and Demolition Waste
• Challenges
• Management Strategy
• Management Strategy
• Reduce
• Reuse
• Recycle
• Recommendation
What is Construction Waste What is Construction Waste
Site Clearance Site Clearance
Tunneling Tunneling Demolition
Demolition Excavation Excavation
N
Nonon--inert (16%)inert (16%)
Soft
Soft Hard Hard
Inert (84%) Inert (84%)
Construction Waste Construction Waste
Soft Soft
(Sand, Clay (Sand, Clay) )
(59%) (59%)
Hard Hard
(rock, crushed concrete, brick, tiles (rock, crushed concrete, brick, tiles) )
(25%) (25%)
Recyclable Recyclable
((rock, crushed concreterock, crushed concrete) ) (20%)
(20%)
Non
Non--recyclable recyclable
(Brick, tiles (Brick, tiles))
(5%) (5%)
CHALLENGES
CHALLENGES
19.1 15.0
20.0 25.0
Quantity (million tonne)
Annual Generation of Construction Waste in Hong Kong
Public Fill C&D Waste
4.2
5.7 5.2
2.7 2.4 2.5 2.8 2.7 2.3 3.7
3.11 2.4 2.4
1.5 1.1 1.0 1.1 4.0
3.0 6.5
8.3 8.0 9.3
10.7 11.1 11.9 12.7
17.2 18.1 19.1
9.4 7.2
9.2
14.3
0.0 5.0 10.0
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Quantity (million tonne)
Year
Inert Construction Waste Inert Construction Waste
6 to 7 Million Tonnes/Year + 6 to 7 Million Tonnes/Year +
Mega Infrastructural Projects to
2016
Tuen Mun Fill Bank
Tseung Kwan O Fill Bank
Reasons Leading to Current Situation
• Low cost in exploiting natural resources
• Low cost of aggregates from Mainland
• Site redevelopment after relocation of airport
airport
• Fast redevelopment of site for quick financial return
• Inherited bad “use and throw away” habit
• Poor waste management concept
• No reclamation project under planning
• Total reclaimed area 6824ha 香港填海面積 – 6824 公頃
Approx. extent of previous
reclamation 過去填海過去填海過去填海 過去填海大概大概大概大概 範圍範圍範圍
範圍 Legend 說明說明說明說明
6824
• 27% of population 27%的人口
• 70% of office floor area
70%的總辦公室樓面面積
• New towns, e.g. Shatin, TKO 新市鎮例如沙田、將軍澳
Urgency to Handle Surplus Public Fill:
處理建築填料的迫切性 處理建築填料的迫切性 處理建築填料的迫切性 處理建築填料的迫切性: : : :
• Land development (from rezoning, resumption and redevelopment) also generates Public Fill
土地發展(從更改用途,收地及重建)也會產 生建築填料
Public Fill 建築填料 建築填料 建築填料 建築填料
• Despite successful implementation of “Reduce, Reuse and Recycle” in the past few years,
construction activities still generate about 6 to 7 million tonnes surplus public fill each year
儘管在過去幾年成功實施「減少、重用和
回收」建築填料,每年建造業仍然產生剩
餘建築填料約600萬至700萬公噸
My Presentation
• What is Construction and Demolition Waste
• Challenges
• Management Strategy
• Management Strategy
• Reduce
• Reuse
• Recycle
• Recommendation
Management Strategy
Management Strategy
• Reduce the generation of construction waste
• Maximise reuse and
• Maximise reuse and recycling
• Reduce intake of mixed
waste at landfills
My Presentation
• What is Construction and Demolition Waste
• Challenges
• Management Strategy
• Management Strategy
• Reduce
• Reuse
• Recycle
• Recommendation
Reduce
• C&D Management Plan and
Waste Management Plan
Reduce
• Low Waste Construction Designs and Technologies
Lean Construction
Balanced Cut and Fill
Modular Construction
Reuse of Construction Waste
Reduce
• Raw Materials Management
Reduce
• Waste Management Charging Scheme
Government Waste Disposal Facilities
Type of Construction Waste Accepted
Charge per tonne Public fill reception
facilities#
Consisting entirely of inert construction waste
$27
Sorting facilities# Containing more than 50%
by weight of inert construction waste
$100
Landfills@ Containing not more than 50% by weight of inert
construction waste
$125
Outlying Islands Transfer Facilities@
Containing any percentage of inert construction waste
$125
# operated by CEDD @ operated by EPD
19.1 15.0
20.0 25.0
Quantity (million tonne)
Annual Generation of Construction Waste in Hong Kong
Public Fill C&D Waste
4.2
5.7 5.2
2.7 2.4 2.5 2.8 2.7 2.3 3.7
3.11 2.4 2.4
1.5 1.1 1.0 1.1 4.0
3.0 6.5
8.3 8.0 9.3
10.7 11.1 11.9 12.7
17.2 18.1 19.1
9.4 7.2
9.2
14.3
0.0 5.0 10.0
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Quantity (million tonne)
Year
My Presentation
• What is Construction and Demolition Waste
• Challenges
• Management Strategy
• Management Strategy
• Reduce
• Reuse
• Recycle
• Recommendation
Reuse
Reuse
• Reclamation in Hong Kong
Reuse
• Reclamation in Mainland
Guang Hai Wan, Taishan
Fill Bank in Hong Kong
Guang Hai Wan, Taishan
Public Fill 建築填料 建築填料 建築填料 建築填料
Delivery to the Mainland for Reuse 運往內地重用 運往內地重用 運往內地重用 運往內地重用
•
170 km away from HK, 22 hours Round trip 離香港
離香港離香港170 公里離香港 公里公里公里,,,, 來回來回來回來回22 小時小時小時小時•
65 nos. vessels per day 每日
每日每日每日65 艘遠洋船運送艘遠洋船運送艘遠洋船運送艘遠洋船運送•
Consume19,000 litres more diesel per day 每日
每日每日每日消耗額外消耗額外消耗額外11119,000公升消耗額外 公升公升公升柴油柴油柴油柴油•
Extra 50 tonnes carbon emission per day 每日
每日每日每日碳排放量碳排放量碳排放量增加碳排放量增加增加增加50公噸公噸公噸公噸•
Cost $27 per tonnes more than local reclamation 比本地填海每公噸多
比本地填海每公噸多比本地填海每公噸多比本地填海每公噸多$27Hong Kong Hong Kong
香港香港香港 香港
Taishan
台山台山 台山台山My Presentation
• What is Construction and Demolition Waste
• Challenges
• Management Strategy
• Management Strategy
• Reduce
• Reuse
• Recycle
• Recommendation
Recycle
• Selective Demolition
• Proper Sorting
Temporary C&D Materials Recycling Temporary C&D Materials Recycling Temporary C&D Materials Recycling Temporary C&D Materials Recycling Temporary C&D Materials Recycling Temporary C&D Materials Recycling Temporary C&D Materials Recycling Temporary C&D Materials Recycling
Facility in Facility in Facility in Facility in Facility in Facility in Facility in
Facility in TuenTuenTuenTuenTuen MunTuenTuenTuen MunMunMunMunMunMunMun Area 38Area 38Area 38Area 38Area 38Area 38Area 38Area 38
Preliminary Sorting
Primary Crushing Secondary Crushing Stockpiles Impurity Removal Facilities
Recycled Products Recycled Products
Private Construction Waste Recycling Facility Private Construction Waste Recycling Facility
in Hong Kong in Hong Kong
Primary Crushing
Primary Crushing SSecondaryecondary CrushingCrushing Sieving into different sizesSieving into different sizes
Problems in Promoting Use of Problems in Promoting Use of Problems in Promoting Use of Problems in Promoting Use of Problems in Promoting Use of Problems in Promoting Use of Problems in Promoting Use of Problems in Promoting Use of
Recycled Aggregates Recycled Aggregates Recycled Aggregates Recycled Aggregates Recycled Aggregates Recycled Aggregates Recycled Aggregates Recycled Aggregates
Lack of confidence - view as inferior materials
Lack of local experience
Uncertainty in quality
Appropriate specifications still under development
Imported natural aggregate is cheaper
Over-specifying
Not catered in planning and design stages
Unsteady in supply
Appropriate specifications still under development
My Presentation
• What is Construction and Demolition Waste
• Challenges
• Management Strategy
• Management Strategy
• Reduce
• Reuse
• Recycle
• Recommendation
Recommendations Recommendations
Promotion activities to the industry
Incentive to the market to encourage the use of recycled aggregates
the use of recycled aggregates
Arrange demonstration projects
More supply points (recycled plants) of recycled aggregates