recycling of concrete · c2ca: cement and aggregates from eol concrete 14 stakeholder issues change...
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16-8-2013
Challenge the future
Delft University of Technology
Recycling of Concrete The C2CA project Delft University of Technology
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2 C2CA: Cement and aggregates from EOL concrete
Strukton - Theo Pouw - Heidelberg Cement - Holcim - DV - Laser 2000 – Inashco R&D
TU Delft - Roma - AGH University - ICE-HT - Barcelona - Leiden - TU Denmark
Concrete Recycling: C2CA An initiative of Strukton and TU Delft
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3 C2CA: Cement and aggregates from EOL concrete
EU vision
Reduce transport of building materials
Recycle building waste into high-value
new materials
Create new EU-wide regulation
Health, wealth, sustainability, harmonisation
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4 C2CA: Cement and aggregates from EOL concrete
EU Project
In situ, mechanical, moist process
(not wet, not dry >>> cheap & safe)
On-line certification of aggregate
Reuse of old cement paste in new binders
C2CA: Concrete to Cement & Aggregate
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5 C2CA: Cement and aggregates from EOL concrete
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6 C2CA: Cement and aggregates from EOL concrete
Removal of fines and contaminants from aggregate
ADR classification
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7 C2CA: Cement and aggregates from EOL concrete
On-line certification of aggregate Laser-induced breakdown spectroscopy
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8 C2CA: Cement and aggregates from EOL concrete
Groningen case Recycling of two office towers
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EoL concrete recycling at Theo Pouw
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10 C2CA: Cement and aggregates from EOL concrete
EoL concrete recycling at Theo Pouw
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11 C2CA: Cement and aggregates from EOL concrete
Groningen case Concrete with recycled aggregate ( ) is stronger
Results from Prof. Jan Deja and Dr. Radosław Mróz, AGH University, Wroclaw, Poland
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12 C2CA: Cement and aggregates from EOL concrete
Type of concrete
compressive strength (Mpa) control samples
in water
standard error
compressive strength (Mpa)
after freeze-thaw cycles
standard
error
Loss of weight
[%]
NAC 61,9 1,3 61,5 1,2 < 5
RAC 56,4 0,5 50,6 1,6 < 5
Compressive strength of samples after freeze-thaw cycle and control samples in water.
Groningen case Concrete with recycled aggregate is durable
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13 C2CA: Cement and aggregates from EOL concrete
Reuse of old cement paste Cement production: ~10% of CO2 emissions
2000 tons of old cement paste concentrate
turned into new cement at ENCI, Maastricht
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14 C2CA: Cement and aggregates from EOL concrete
Stakeholder issues Change
Actor Change Risk / Driving force
Recycler Aggregates for road >
Aggregates for mortar
Fight into new market /
Market for road shrinks
Mortar producer Natural aggregate >
Recycle aggregate
Quality / Automatic
quality control, price
Cement producer Lime > EOL Cement
paste
Less control over supplies,
present owner of lime /
CO2 reduction
Construction cy > Secondary mortar Green product, perfect
negotiation position
Public Less transport Health, wealth, etc.