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

Transcription

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

2 LAVARIS Ltd. company (Libčice near Prague, CZ) 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

3 Assembly Line

4 Recycling Line Variable layout, components according to requirements. Stationary Version: Drying Activation Homogenization Light-Weight Blocks Mobile Version:

5 High-Speed Mill Key Component of the Recycling Lines Stationary Line Model Power plant [kw] Productivity [t/hours] SBD SBD SBD SBD SBD Mobil Line Model Power plant [kw] Productivity [t/hours] MBD MBD MBD MBD Screener SBD 600 SBD 600 SBD 150 SBD 300

6 Design of Homogenizing Mill D550 High-Speed Mill Hammer Mill

7 High-Tech Technologies Anti-Vibration and Acoustic Barrier Recycled Rubber Filtration Polymer Nanofiber Textiles Dust-Free Design Self-Supporting Power Unit Photovoltaic Panel with Tracker Photo: dynamix/sxc.hu

8 milled raw material Some Model Materials West Bank of Jordan River and Egypt Marble industry ( Electron microscopy (100 ) Optical microscopy (80 )

9 Model Material (West Bank) Sand 0 2 mm Cement Stone sludge Frakce 2 4 mm Frakce 0 2 mm Controlled grain-size distribution

10 Complete Building System variable layout, components according. to requirements Reference house from recycled materials student project.

11 Masonry Block low cement content recycled material to 90 % wt. compressive strength 12 MPa heat accumulation acoustic barrier Exterior Plasters stone microfiller to 70 % wt compressive strength > 6 MPa optimized for low shrinkage good adhesion 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 optimized for low shrinkage good adhesion

12 Controlled Modification of Utility Properties 2D or 3D Nanohydrophobization Light-Weight Blocks (no need for heating)

13 Experimental/Standard Testing on Nano/Micro/Macro Level Application / Real Conditions

14 Use of Concrete Microfiller Sample Density Specific surface (kg.m -3 ) (m 2 kg -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 determination of density and specific surface (Blaine); comparison with standard cement. Compound Original crushed cocrete Grinded material (KR) Grinded material (DR) (%) (%) (%) chemical analysis and comparison of recycled concrete and mechanically activated concrete microfiller. SiO TiO Al2O Fe2O FeO MnO MgO CaO Na2O K2O P2O H2O H2O CO S tot

15 Application in Cold Pavement Recycling Pulverized concrete from railroad ties 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 RAP 0/22 0/11 0/22 Bit. emulsion Foamed bitumen PC ML Limestone 0/ Cement ,5F + 3PC

16 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

17 Cold Pavement Recycling with Activated Fly-Ash Mix design REC REC REC REC REC REC REC REC REC REF P01 P02 P03 P04 P05 P06 P07 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% 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) % 15.0% Mechanically activated flyash % 7.5% 10.0% - - Reclaimed asphalt material 0/ % 89.0% 84.0 % 81.0% 88.0% 84.0% 81.5% 81.5% 76.5% Mix Indirect tensile strength (MPa) 7 air 14 air 7 air + 7 water 28 air ITSR* Decrease of ITS Frost susceptibility REC REF REC P REC P REC P REC P REC P REC P REC P REC P

18 Micromilled Limestone for Asphalt 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). 18

19 Micromilled Limestone for Asphalt Use of pulverized limestone as an active filler for improving asphalt mixture durability example of dolomitic limestone 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% Reference mix (no additive) Mech. activated dolomite Filter fly-ash Bottom-ash AdHere (type A) Limestone filler + dolomite 19

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