uhpc timeline - arch-goebel.ch

Ultra High Performance Concrete Presentation 2018, Houston Texas

UHPC Timeline

1964 Start of research in Denmark

1967 Bache, reports 350 MPa with small specimen made with strong compaction

1970 Using first time Superplastizier

1978 Bache, concrete and mortar with blended cement with 30 % ultra fine fillers, 280 MPaFirst of many Patents are placed

1983 Danish company founded to commercialize DSPResearch start to increase fracture engergy by strong aggregates and fiber reinforcement

1986 First aplications of DSP are Moulds, Security Industry, Wear Protection and Industrial Flooring

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1986 Bache, develops Compact Reinforced Composite

1987 New applications and new markets: Semi flexible wearing courses, Concrete Repair and OffshoreFirst Spray projectsFirst Wear protection projects

1987 Development of High temperature resitant products and first projects

1988 First UHPC-Asphalt pavement combination projects for Airports

1990 First UHPC-Asphalt pavment combination projects in sea ports

1994 First flooring projects in warehouses

1999 First Offshore Windmill projects

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UHPC - MATERIAL COMPOSITION

Cement:Binding material, contributes to the main part of the compressive strength

Microsilica:Densifies, contributes to the compressive strength, “lubricates” the aggregates

Superplasticizer:Breaks down agglomeration and packs the particles

AggregatesFit required properties (Stones and/or fibres)

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Densif ied System with ultraf ine Particles

0.01 mm

CEMENT PASTE(Cement particles and water)w/c = 0,50 - 0,70

SUPER PLASTIZISED CEMENT PASTE(Cement particles,Superplastiziser and water)w/c = 0,30 - 0,35

DSP TECHNOLOGY(Cement, Microsilica,Superplastiziser and water)w/p = 0,18 - 0,22

1 mm

10 mm

Concrete Diamond

Microstructure

Thin section

Fracture surface

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C

W

Standard cement binderLarge cement pores

W/Cratio

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W

C

W

C

Standard cement binderLarge cement pore

W/Cratio

W/Cratio

UHPC cement binder withceramic aggregates and

fibersNo pore

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Development of the compressivestrength of standard concretescompared to UHPC materialqualities

After less than 48 hours, achieves threetimes the strength of standard concrete

UHPC

Concrete

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Strength development of UHPC atdifferent ambient temperatures

ExampleUHPC 1000 CastCompressive strength 210 MPa / 30457 psi

at5°C / 41°F 63 MPa / 9862 psi10°C / 50°F 126 MPa / 18274 psi20°C / 68°F 157 MPa / 22770 psi30°C / 86°F 168 MPa / 24366 psi

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UHPC


Concrete5 mm

UHPC0 mm

Carbonation Chloride permeability Electrical resistivity

Carbonation depth after3,5 years at 65% RH, 20°C

Diffusion coefficient forChloride ions

Resistivity after 0,5 year at22°C, 100%RH

Concrete26x10-13

m²/sec

Concrete<0,1

k ohm m

UHPC0,6x10-13

m²/sec

UHPC20

k ohm m

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Concrete20 mm

UHPC1 mm

Water permeabilityAccording to DIN 1048

Acid resistanceAccording to DIN 51091

Weight loss after 28 daysIn 70% sulphuric acid at 24,5°C

Concrete313 g/m2

UHPC114 g/m2

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Product UHPC Concrete

Density kg/qqm 2900 2300

Compressiv strength MPapsi

130 – 25018800 - 36260

5 – 70725 - 10150

Flexural strength MPapsi

294200

1 – 5145 - 725

E-Modul MPa 70000 – 80000 20000 – 40000

Hardness Mohs 8 – 9 3 – 4

Thermal conductivity W/mK 1,5 2

Coeff. Of thermal expansion K-1 10x10-6 10x10-6

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uhpc timeline - arch-goebel.ch

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