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Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate...

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Nanotechnology of Concrete Virginia Concrete Conference March 2-3, 2017 Jeremy Betts 1
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Page 1: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Nanotechnology of Concrete

Virginia Concrete Conference

March 2-3, 2017

Jeremy Betts

1

Page 2: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Nanotechnology

World of the extremely small

Page 3: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

How Small?

3

Sobolev

2016

Page 4: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

CSH Nano Structure

4

Page 5: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Nano Characterization (tests)

Nano indentation

Nano Scratch

Ultrasonic Atomic Force Microscopy

X-ray diffraction (XRD)

5

Page 6: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Nano Indentation

6

Page 7: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Nano scratch

7

Page 8: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Ultrasonic Atomic Force Microscopy

8

Page 9: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

XRD

9

Page 10: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Making Nano Materials

10

Page 11: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Making Nano Materials

Top Down Bottom Up

11

Page 12: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Nano assembly

Biomemetics

12

Page 13: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Advanced Fibers

13

Page 14: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Superhydrophobic Concrete

14

Page 15: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Superhydrophobic Concrete

15

Page 16: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Superhydrophobic Concrete

16

Page 17: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Self Monitoring Concrete (piezoresistive property)

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Page 18: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Current Application of Nanoparticles

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Page 19: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Nano-silica (nano-SiO2)

Properties

Accelerates hydration reactions

and dissolution of C3S

Accelerates pozzolanic effect of fly ash

Denser packing of hydration

products

Increases viscosity (thicker)

Reduced bleed water

Longer mixing required

19

Page 20: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Nano-silica (nano-SiO2)

Properties

Decreases porosity

Improved compressive strengths

Improved Flexural Strengths

Increased abrasion resistance

ASR mitigation

Pozzolanic effect higher than that

of silica fume

20

Page 21: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Nano-silica (nano-SiO2)

Where has it been used?

RMG (Rock matching Grout)

SCC

Cementitious pavement coating

Viscosity Modifier

Accelerator

21

Page 22: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Nano-titanium dioxide (Nano-TiO2)

22

Page 23: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Nano-titanium dioxide (Nano-TiO2)

Photocatalysis

Pollutants (and stains) are

destroyed through molecular

adsorption and oxidative reaction

processes

Ultimate products : CO2, H2O,

NO3-, SO42-, O2, Cl-, ...

Catalyst remains indefinitely

23

Page 24: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Nano-titanium dioxide (Nano-TiO2)

Properties

Does not noticeably alter fresh

concrete properties (basic)

De- polluting

Self Cleaning

24

Page 25: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Nano-titanium dioxide (Nano-TiO2)

Where has it been used?

All Types of Concrete

Stucco

Cementitious coatings

Monuments

Buildings

Roadways

25

Page 26: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Carbon Nanotubes/Nanofibers

26

Page 27: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Carbon Nanotubes/Nanofibers

Nanotubes (CNT)

27

Nano Fibers (CNF)

Page 28: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Carbon Nanotubes/Nanofibers

Properties

Compressive and flexural strength

enhancement

Chemical resistance

Electromagnetic shielding

Self sensing capabilities

Abrasion resistance

Shrinkage reduction

Decreased permeability

Increases Viscosity

Dispersion agent recommended

28

Page 29: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Carbon Nanotubes

Where has it been used?

Several concrete mix types

Bulidings

Road repair (approved by GDOT)

Further research needed

29

Page 30: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Other Concrete Nanoparticles

Nano-calcium carbonate (Nano-

CaCO3)

Nano-clays

Electric arc furnace dust (Nano-

ZnFe2O4)

Nanoalumina (Nano Al2O3)

Nanoiron (Nano Fe2O3)

30

Page 31: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Nano-composites

New generation chemical

admixtures

– PCP (polycarboxylate-based polymers )

– Controlled release

technology

31

Page 32: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Environmental Effects and Safety of Nanomaterials

Used in Concrete

Safety Precautions

– Respiration

– Ingestion

Environmental Precautions

– Agglomeration

32

Page 33: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Upcoming ACI Publication

33

Page 34: Nanotechnology of Concrete · 2018. 3. 26. · Other Concrete Nanoparticles Nano-calcium carbonate (Nano-CaCO3) Nano-clays Electric arc furnace dust (Nano-ZnFe2O4) Nanoalumina (Nano

Questions?

34


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