Utilization of Ground Eco-Filler Actived by High-Speed Multi Level - - PowerPoint PPT Presentation

Utilization of Ground Eco-Filler Actived by High-Speed Multi Level Mill in Civil Engineering

with partners

• Recycling Lines: rubber granulate, concrete dust and stone

sludge/dust.

• Technology: active rubber powder, concrete and stone powder

science and applied research.

• Customer Service:
• Research center
• Service and spare part
• Consulting
• Design
• Optimalization

LAVARIS Ltd. company

(Libčice near Prague, CZ)

Assembly Line

Variable layout, components according

Recycling Line

Drying Activation Homogenization Light-Weight Blocks Mobile Version:

to requirements.

Stationary Version:

Key Component of the Recycling Lines

High-Speed Mill

Model Power plant [kW] Productivity [t/hours] SBD 251 2 × 15 0.25 SBD 401 1 × 10 0.15 SBD 600 2 × 30 0.80 SBD 800 2 × 55 3 – 5 SBD 1000 2 × 110 4 – 7

• Stationary Line

Model Power plant [kW] Productivity [t/hours] MBD 251 2 × 15 0.25 MBD 401 1 × 10 0.15 MBD 600 2 × 30 0.80 MBD 800 2 × 55 3 – 5

• Mobil Line

SBD 600 SBD 300 SBD 150 SBD 600 Screener

Design of Homogenizing Mill D550

High-Speed Mill

Hammer Mill

Filtration – Polymer Nanofiber Textiles

High-Tech Technologies

Dust-Free Design Anti-Vibration and Acoustic Barrier Self-Supporting Power Unit – Photovoltaic Panel with Tracker

Photo: dynamix/sxc.hu

Recycled Rubber

West Bank of Jordan River and Egypt

Some Model Materials

Optical microscopy (80 ×) Electron microscopy (100 ×)

raw material milled

Marble industry (http://mines.pajhwok.com)

Frakce 0 – 2 mm Frakce 2 – 4 mm Controlled grain-size distribution Cement Sand 0 – 2 mm Stone sludge

Model Material (West Bank)

• variable layout,
• components according.

to requirements

Complete Building System

Reference house from recycled materials – student project.

Exterior Plasters stone microfiller to 70 % wt compressive strength > 6 MPa

• ptimized for low shrinkage

good adhesion Masonry Block low cement content recycled material to 90 % wt. compressive strength 12 MPa heat accumulation acoustic barrier Bed-Joint Mortar stone dust filler to 80 % wt. cement 20 % wt. compressive strength to 9 MPa good adhesion Interior Plasters stone microfiller to 90 % compressive strength > 4 MPa

• ptimized for low shrinkage

good adhesion

Controlled Modification of Utility Properties

2D or 3D Nanohydrophobization Light-Weight Blocks (no need for heating)

Experimental/Standard Testing

• n Nano/Micro/Macro Level

Application / Real Conditions

Use of Concrete Microfiller

Density Specific surface

(kg.m-3) (m2kg-1)

Grinded concrete (KR) 2,432 3,737 Grinded concrete (DR) 2,547 3,884 Reference material (CEM I/32,5 N) 3,096 0,421

Sample

• determination of

density and specific surface (Blaine);

• comparison with

standard cement.

• chemical analysis and

comparison of recycled concrete and mechanically activated concrete microfiller.

Original crushed cocrete Grinded material (KR) Grinded material (DR) (%) (%) (%) SiO2 66.01 66.02 66.88 TiO2 0.13 0.13 0.13 Al2O3 3.72 3.74 3.12 Fe2O3 1.24 1.25 0.31 FeO 0.32 0.35 3.17 MnO 0.03 0.03 0.06 MgO 1.11 1.12 1.4 CaO 15.48 15.52 13.75 Na2O 0.45 0.46 0.44 K2O 0.99 0.99 0.94 P2O5 0.03 0.03 0.03 H2O- 1.67 1.54 0.94 H2O+ 3.79 3.77 4.76 CO2 4.59 4.6 4.4 Stot 0.3 0.3 0.25 Compound

Application in Cold Pavement Recycling

Mix 3.5E + 5PC 3.5E + 3PC 3.5E + 5ML 3.5E + 3ML 4.5F+ 1.5C+ 1.5PC 4.5F + 5PC 4.5F + 3PC 4.5F + 5ML 4.5F + 3ML 2.5F + 9.6PC 2.8F+ 10.6L 0/2 2,5F + 3PC RAP 0/22 0/11 0/22

• Bit. emulsion

3.5 3.5 3.5 3.5

• Foamed bitumen
• 4.5

4.5 4.5 4.5 4.5 2.5 2.8 2.5 PC 5.0 3.0

• 1.5

5.0 3.0

• 9.6
• 3.0

ML

• 5.0

3.0

• 5.0

3.0

• Limestone 0/2
• 10.6
• Cement
• 1.5
• Pulverized

concrete from railroad ties

Application in Cold Pavement Recycling

• cold mix variations with

bitumen emulsion and cement;

• substitution of cement

by milled limestone or pulverized concrete;

• results of indirect tensile

strength.

• cold mix variations with

foamed bitumen and cement;

• substitution of cement

by milled limestone or pulverized concrete;

• results of indirect tensile

strength

Cold Pavement Recycling with Activated Fly-Ash

Mix design REC REF REC P01 REC P02 REC P03 REC P04 REC P05 REC P06 REC P07 REC P08 Water 4.5% 4.5% 5.0 % 5.5% 5.5% 5.0% 5.0% 5.0% 5.5% Cement CEM II/B - S32,5R 3.0%

• 1.0%
• 1.0%

1.0% Bituminous emulsion C60B7 3.5% 3.5% 3.5 % 2.5% 3.5% 3.5% 3.5% 2.5% 2.5% Fly-ash (Ledvice)

• 3.0%

7.5 % 10.0%

• Bottom-ash (Počerady)
• 10.0%

15.0% Mechanically activated fly- ash

• 3.0%

7.5% 10.0%

• Reclaimed asphalt material

0/11 89.0% 89.0% 84.0 % 81.0% 88.0% 84.0% 81.5% 81.5% 76.5% Mix Indirect tensile strength (MPa) ITSR* Decrease of ITS Frost susceptibility 7 air 14 air 7 air + 7 water 28 air REC REF 0.45 0.84 0.56 0.91 0.68 1.24 0.91 REC P01 0.71 1.05 0.78 0.82 0.74 1.10

• REC P02

0.51 0.58 0.43 0.82 0.74 0.84 0.88 REC P03 0.4 0.55 0.41 0.63 0.74 1.02 0.60 REC P04 0.66 0.63 0.54 0.65 0.86 0.82

• REC P05

1.14 1.18 1.37 1.42 1.16 1.20 0.88 REC P06 1.23 1.19 0.97 1.63 0.82 0.79 0.81 REC P07 0.49 0.51 0.42 0.66 0.82 0.86

• REC P08

0.41 0.49 0.40 0.55 0.82 0.98

Micromilled Limestone for Asphalt

18

• use of various limestone waste dust or sludge products;
• high pulverization coefficient reached by applying a continuous milling

without any additional surfactant additive (example: Czech limestone from Krty location – one milling cycle with 0-4 mm grading);

• material on the edge between micro- and nano-particles with broad

range of applications (by far not only limited to building industry).

Micromilled Limestone for Asphalt

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Reference mix (no additive)

• Mech. activated

dolomite Filter fly-ash Bottom-ash AdHere (type A) Limestone filler + dolomite

19

• Use of pulverized limestone as an active filler for improving

asphalt mixture durability – example of dolomitic limestone

Application in Road Infrastructure

• Mechanical chemical activation is believed to transform some waste

materials into a raw material suitable for cold recycled mixes or soil stabilizations.

• Properties improved in time.
• In the case of pulverized recyclable concrete additions of this material

modified by high-speed milling resulted in a slight reduction of stiffness and indirect tensile stress; however, the reduction is far from essential and mixes containing pulverized concrete had no problems meeting the requirements .

• The optimal content of added pulverized concrete around 5-7 %.
• Pulverized limestone effective in asphalt mixtures.
• Potential

also for

• ther

by-products like e.g. fly-ash (another alternative binder).