TailorCrete The start of a minor revolution in the construction industry.
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Transcript of TailorCrete The start of a minor revolution in the construction industry.
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TailorCrete
The start of a minor revolution in the construction industry.
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The most well known usage of concrete
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Liquid stone – design freedom not for everyday use
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Challenges - formwork
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Challenges - reinforcement
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New possibilities with Self compacting concrete (SCC)
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New possibilities with robots
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New possibilities with advanced 3D digital tools
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The main goal of TailorCrete is to develop and demonstrate an industrialised process for producing unique, tailor-made structures using a radically new
and cost effective approach =production of singular TailorMade concrete
structures at mass production costs.
The concept involves both on-site and pre-fabricated elements and both load-carrying and
facade elements.
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Proof of concept in Denmark
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MDF formwork
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Pistons to tailor-make formwork
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Foundry sand
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Spraying formoil
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Partners
Architects/designers:Superpool, Turkey (SME)DesignToProduction, Switzerland (SME)Construction :Dragados, Spain
Manufacturers concrete:Unicon, DenmarkEl Caleyo, Spain (SME)
Raw material manufacturers:Grace, GermanyBekaert, Belgium
Formwork suppliers: Paschal, Denmark (SME)
Robot supplier:Giben, Denmark (SME)
Research:Danish Technological Instsitute, Denmark (Co-ordinator)ETH, ZurichChalmers, SwedenCzech University, CzechUniversity of Southern Denmark, Denmark
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Time table: August 2009- July 2013
Budget: 8,5 million euro (5,9 financed by EC)
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A new bridge Oparno on the Prague – Dresden highway
Bridge under construction (2008-2010)
Arch span 135 m Budget ~20 mil. €
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Optimal position of cooling pipes
Arch casting continues through the whole year – varying temperature Massive casted arch segments could attain temperature over 90oC during
summer which is unacceptable 12 cooling pipes inserted in the arch Two criteria
Temperature bellow 70oC (possible delayed ettringite formation)Reasonable stress field and temperature gradients
2.3
m
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Progress in 03/2009
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Progress in 07/2009
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Progress in 09/2009
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Cement CEM I 42.5R PrachoviceCaO 63.2, SiO2 20.8, Al2O3 5.8, Fe2O3 3.3, MgO 3.6, K2O+Na2O 2.1, free CaO 0.88, SO3 2.85
Bogue: C3S 43.76, C2S 26.63, C3A 9.79, C4AF 10.04
Blaine fineness 320 m3/kg
Concrete C45/55 XF2Cement 431 kg/m3 in which 5% SCMWater 178 kg/m3, w/b = 0.413Aggregates 1785 kg/m3
Superplasticizer 4.19 kg/m3
Silica fume 30 kg/m3
Limestone 30 kg/m3
Entrained/entrapped air 2.8 %
Ready-mix concrete composition
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Multiscale modeling approach
Coupled cement hydration model on microscale with FEM on macroscale Eight cement microstructures 50x50x50 mm assigned to color regions Simulation runs ~30 minutes covering several weeks after casting
# 1
# 8
......
Axi
s of
sym
met
ry
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Multiscale simulation with coupled mechanics
1. No cooling 2. Original cooling
3. Optimized cooling 4. Stress distribution
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Effect of pipe cooling in summer
Ambient air temperature 30oC
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Effect of pipe cooling in winter
Ambient air temperature 5oC