hall 2d tuesday15h00 - chris whyte
TRANSCRIPT
“Using waste to create jobs and build sustainable green homes ”
21-22 July 2015
NCPC Industrial Efficiency Conference:
CHRIS WHYTE: 031-7652349 – 0824158138
Industrial Symbiosis & Waste Management
Background to USE-IT &
relationship with eThekwini:
• USE-IT is a Section 21 NPC established in 2009 under an MoA
with eThekwini Municipality.
• USE-IT’s mandate is to create jobs through waste diversion from
landfill and the development of waste beneficiation projects
• To date USE-IT is a cost-negative operation saving eThekwini
more than R2 for every Rand of operational funding received
• USE-IT has facilitated the creation of 2235 jobs (371 direct jobs,
1766 indirect jobs and 98 contract jobs) and leveraged more than
11 times the operational funding in public and private sector
project funding.
• The Compressed Earth Block project is one of our Flagship
Projects – essentially we target waste soils and blend with waste
rubble and use hydraulic compression to make blocks.
The reality is that national average for soil
waste and builder’s rubble constitutes 25-40%
of waste going to landfill:
Housing delivery realities:
• The Housing backlog in eThekwini currently stands at around
408,000 units and there are about 34,700 units that require
demolishing, rebuilding or rehabilitation (www.cornubia.co.za 28 Jan 2014)
• Current delivery rate is 6500 units per year or 1.6% of the
backlog per year
• Considering the urbanisation growth rate at a conservative 2.5%
per year, the backlog will continue to grow unless we look at new
ways of tackling the problem
• We believe the eThekwini-funded project on Compressed Earth
Blocks can contribute to solving the problem
• The national housing delivery rate fell by 25% in the past five
years and the backlog stands at 2.3-million - Human Settlements
Minister Lindiwe Sisulu (July 2014).
Advantages of Compressed Earth Blocks:
• CEB’s used successfully in more than 23 countries. Currently have
local Agrément certification, SABS, NHBRC & CIDB approval
• Using available soils with a 7-50 % clay component (stockpile)
• Fire-proof, bullet-proof, insect resistant, earthquake resistant
• 3 to 5 times stronger than minimum compressive strength
requirements for structural masonry blocks and up to 10 times more
thermally efficient than cement blocks
• CEB’s proven to cost at least 16% less than conventional methods
• Building process is faster and cheaper – no mortar, no firing or
curing of blocks
• Up to 8 tons of Carbon saved per 50m2 of construction (UNEP)
• Multiple benefits – creation of jobs, local skills development,
delivery on housing backlog, energy efficient sustainable housing,
waste soil and builder’s rubble solutions, affordable, comfortable,
healthy, etc.
Mobile equipment:Mixer and Blender
Block Compressor
Full system comprise mixers,
hydraulic compressors, cutters,
soil test kits and spares
Basically, we use available suitable or waste soils and up to 30% crushed rubble
that we blend with 5% cementTo the mixer
Earth block productTo block
machine
Available soil
Familiar methods to install
windows and door frames, arches,
lintels and supports
We use a soil slurry, and not brick
force mortar to join the blocks
The USE-IT Earth Block building system 50m2 unit :
FACT: At 30% crushed builder’s rubble in our blocks, Western Cape produces enough
rubble each year to produce 100,000 eco-friendly affordable houses per year
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In addition to the blocks we use building components made from recycled waste:
Roof tiles, skirting, cornicing,
decking/flooring, piping, guttering,
barge boards, etc.
Each divert waste, create industry in
remanufacturing and jobs
In February 2015 we established a production facility in Stellenbosch
CEB production in Stellenbosch
In Stellenbosch we have 115,000m3 of soil available in one stockpile:
This one soil stockpile in Stellenbosch
can make 22 million blocks enough for
7300 low-income homes, and there are
more suitable soils available locally
destined for fill that could increase this
number many times.
All from the waste we are throwing
away, so a 100% recycled block. Current production in Stellenbosch
In Cornubia (eThekwini) we have a mountain of soil being sent to spoil
Wasting more than half a million tons
of great-quality soil that could be
used to make 52 million blocks or
enough for 15,000 houses of 50m2.
All from the waste we are throwing
away, so a 100% recycled block.
Most of Cornubia could be built
Green, cheaper and stronger
Phase 2 will generate 4 million m3 of waste soil – enough to build 160,000 houses!!
• What’s wrong with this picture?? One development in eThekwini on
mixed land use and an estimated 28,000 low-cost houses is creating
enough soil waste from platforming operations to build 175,000
houses that would be cheaper, stronger, greener and better than the
hollow concrete blocks being used for their construction. The current
planned destination for these waste soils is Buffelsdraai landfill 11km
away at a cost of hundreds of millions using valuable landfill airspace
that would cost another R1.2 billion
• Compressed Earth Block homes would:
• Save transport costs of waste
• Save landfill airspace and cost
• Be 3-5 times stronger
• Be at least 20% cheaper
• Be at least 3 times more thermally efficient
• Save 8t CO2e per 50m2 build – low carbon footprint
• Be soundproof, bulletproof, insect proof and waterproof
• Which option would you choose? A simple and proven application of
Industrial Symbiosis and Waste Management
Industrial symbiosis is a no-brainer…