C&D Waste Handling Business Opportunities & Technical - - PowerPoint PPT Presentation

Department of Civil Engineering Indian Institute of Technology Kanpur

C&D Waste Handling

Business Opportunities & Technical Challenges

Sudhir Misra Department of Civil Engineering Indian Institute of Technology Kanpur Kanpur 208016 INDIA Email: sud@iitk.ac.in

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Department of Civil Engineering Indian Institute of Technology Kanpur

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• NB Mazumdar, Chief Technical Officer, IEISL, New Delhi
• Arun Sharma, Plant Manager, C&D Recycling Plant, New Delhi
• Rajiv Garg, Superintending Engineer, IWD, IIT Kanpur
• Akash Rao, Former Graduate Student, IIT Kanpur
• Jeenu Thomas, Graduate Student, IIT Kanpur
• Chetan Chauhan, Graduate Student, IIT Kanpur

Acknowledgements

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1. Introduction to Construction and Demolition Waste in India 2. Bottlenecks in Construction and Demolition Waste Handling 3. Business Opportunities in bottlenecks

• Onsite Waste Handling
• Recycling Facility
• Recycled Material Utilization

4. Future course of Action (to be finalized towards to end!!)

Key Points

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Source: [1] Ashokan Pappu et al, [2] TIFAC Report

INDIA’S GDP

11%

$100 BILLION INDUSTRY

40-60% INVESTMENT IS IN MATERIALS CONSTRUCTION INDUSTRY SECOND LARGEST SHARE ! MILLIONS OF DOLLARS SAVED IF 3R IS APPLIED

Size of Construction Industry

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Conflicting Numbers for C&D Waste

• Data in India is scarce and often it is more ‘estimates’
• An estimate based on the waste produced per unit

built-up area has been done by the Centre for Science and Environment, which puts the C&D Waste generated figures to 626MT in 2013 alone!!

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Where does the C&D Waste Go ?

LYING ON-SITE DUMPED IN OPEN-SPACES DUMPED NEAR RIVER-BEDS SENT TO LANDFILLS

Image Credits : CSE(Centre for Science and Environment) Govt. India, Report,2013

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Bottlenecks in opportunities and challenges

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Technology, Policy Framework, Government Subsidy and Operational Efficiency Technical Specifications, (RMC, Aggregates and Finished Products) Reduction and Management of Waste on Site

C&D Waste cycle

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Case Study: Building Demolition

– Planning the demolition – Contractual provisions – Waste produced, recycled and re-used

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Demolition Process and Planning

• Demolition was part of the re-construction contract and

the contractor had bid for the ‘demolished building’

• Top to down approach was planned
• Non-Load bearing parts were broken first by hammering

and then the beams and columns.

• All demolition was done manually – tradeoff between

Cost and Time !!

• Some recovered material was sold and remaining reused

as filler/base

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Image: Girls Hostel, Credits : Chetan Chauhan, IIT Kanpur

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Demolition carried taking care to remove the individual bricks as whole

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Image: Girls Hostel, Credits : Chetan Chauhan ,IIT Kanpur

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RC bought down to facilitate removal of steel that was are later sold as scrap

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Onsite: Recycled/Recovered/Re-Used Products

WINDOWS BRICK-BATS BRICKS STEEL FIXTURES PLUMBING FIXTURE

Image: Girls Hostel, Credits :Chetan Chauhan, IIT Kanpur

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C & D Waste handling facility

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Cost Analysis in Processing C&D Waste

REVENUES COSTS (1) WASTE

Charges for lifting Fuel and

• Transp. Costs

Fuel Cost Raw Material (For new finished products) Fe Scrap, Compact waste Recycled Aggregates, RMC, Pavement Tiles, Kerb- Stones, Fine Silt , Clay

3R

COSTS (2) : LAND, MACHINES, OPERATION, PERMITS, ESTABLISHMENT

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Water and Electricity !!

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Material Handling Costs

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C&D Recycling Plant, Bhurari, Delhi

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Process Line Flow

16 3R Conference, Male, Maldives INCOMING MATERIAL INSPECTION SEGREGATION CONCRETE BLOCKS MIXED C&D WASTE RECOVERED WASTE RECYCLED AGGREGATES FINISHED PRODUCTS BRICKS/TILES/WOODEN PEICES

• 1. Purchase of C&D

Waste through MCD, NDMC and PWD

• 2. Material inspected,

manually sorted before processing

• 3. Technical

specifications of the technology used to process waste

• 4. Market for

these materials

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• Established with initial capacity of 500TPD, but now

processes close to 2000TPD

• Waste is collected from designated sites in the city
• Alternate Waste Stream comes form government bodies

like MCD, PWD, DMRC

• Incoming material is weighed and kept for sorting

Special Notes

• Incoming mixed C&D Waste consists of clean concrete

pieces, bricks, tiles, wood, plastic and rubble

• Waste is generally free from Paints, Varnishes,

Chemicals, Asbestos and Asphalt

Some Details

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FINISHED PRODUCTS SORTED WASTE AGGREGATES C&D WASTE

What is a C&D Recycling Plant ?

REDUCED RECYCLED RECOVERED

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ELECTRONIC WEIGHING BRIDGE SORTED BRICKS

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DRY PROCESSING WET PROCESSING

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EVO WASH TECHNIQUE SILT WASHING / SEPARATION

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Case Study: Finished Products

TILES AND KERBSTONES MANUFACTURED BRICKS

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• 1. Model for setting up and running the plant
• 2. Costs, processing and possible subsidies
• 3. Manual Inspection of Materials (Livelihood and

Sustainability propagated through this medium)

• 4. Appropriate technology – crushing, washing, separation

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Business Opportunities to talk about

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Lessons for future plants

• 1. Large stream of incoming waste but stockpiles of processed material,

which is not ‘acceptable’, even for non-structural purposes

• 2. Location and size of plants needs to be carefully decided
• 3. Impacts on Environment
• A. Residential Area Proximity is an important criteria
• B. Sound and Dust Pollution related considerations
• C. Vibrations need to be controlled while the plant operates
• D. Designated site to store the processed and unprocessed waste

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Characterization of recycled material (aggregate)

• High Water Absorption
• Low ultimate Strength
• Low impact Strength/ Hardness of Aggregate

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Using RCA (vs. Natural Aggregates) in concrete

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• Structural vs. Non-Structural uses
• Level of Replacement
• Grade of the concrete

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An examination of the recycled material using tests for ‘new’ material, will only establish it to be a ‘lower level material’. In order to use it (permit it to be used), we need provisions relating to the following

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• Quality of material
• User
• Price

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Selling the products made from recycled material

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Need appropriate technical and commercial guidelines

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Going forward

• Compile a document that comprehensively addresses the

diverse aspects of the problem – though the issues could be country specific, a basic template for compilation of information and data is urgently needed.

• The document should facilitate monitoring over a period
• f time, and set well defined targets and plans of action

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:: Where there is a will, there is a way ::

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:: Thank you for your kind attention ::

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