ORALS

SESSION: AdvancedMaterialsMonAM-R6	4th Intl. Symp. on New and Advanced Materials and Technologies for Energy, Environment and Sustainable Development
Mon Nov, 5 2018 / Room: Guaratiba (60/2nd)
Session Chairs: Fernand Marquis; Alain Tressaud; Session Monitor: TBA

11:45: [AdvancedMaterialsMonAM02] Invited
Development of Hybrid Reinforced Corrosion Resistant Polymer Concretes
Nikoloz Chikhradze¹ ; Fernand Marquis² ; Guram Abashidze¹ ; Davit Tsverava³ ; ¹G. Tsulukidze Mining Institute, Tbilisi, Georgia; ²San Diego State University, San Diego, United States; ³LEPL Grigol Tsulukidze Mining Institute/M.Sc. Student of Georgian Technical University, Tbilisi, Georgia;
Paper Id: 59 [Abstract]

Polymer concretes, unlike common concrete (produced based on cement, as cohesive material), are notable for high durability on compression 50-90 MPa, and especially, on tension 6-10 MPa, with unique corrosion resistance. However, they are also associated with negative properties, such as high creep deformability. Because polymer concretes work well on tension, their application is prospective for the production of shock resistant construction materials, but for this, strengthening by additional reinforcing mechanisms is necessary. In addition, because of differences in the durability and deformability on compression, as well as on tension, it is important to reinforce the polymer concrete's tensile and bended properties. This work presents and discusses the reinforcement of polymer concrete by hybrid fibers. The major goal of this work is the production of such polymer concretes with high durability on tension and high shock resistance that preserves these properties under the effect of aggressive environments. The primary cohesive materials are unsaturated polyester resins, as polymers. The fiber reinforcements (coarse and fine) are primarily three types of basalt, polypropylene, two types of metal fibers, andesite and quartz, all selected for their chemical resistance and durability. The technological parameters for the production and processing of nano and ultrafine dispersive powders from rocks using vibration and planetary mills, and the physical and mechanical properties of these concretes are presented and discussed. The data on the corrosion resistance of these processed polymer concretes (corrosion resistance coefficient, diffusion coefficient of aggressive liquids, coefficient of liquids- sorption, and the coefficient of liquids penetration in the concretes) are also presented and discussed.

SESSION: AdvancedMaterialsMonPM1-R6	4th Intl. Symp. on New and Advanced Materials and Technologies for Energy, Environment and Sustainable Development
Mon Nov, 5 2018 / Room: Guaratiba (60/2nd)
Session Chairs: Janina Molenda; Michael Zharnikov; Session Monitor: TBA

15:15: [AdvancedMaterialsMonPM108] Invited
Fabrication of Nanocomposites by Mechanical Alloying and Explosive Consolidation
Nikoloz Chikhradze¹ ; Guram Abashidze¹ ; Fernand Marquis² ; Mikheil Chikhradze³ ; ¹G. Tsulukidze Mining Institute, Tbilisi, Georgia; ²San Diego State University, San Diego, United States; ³Georgian Technical University, Tbilisi, Georgia;
Paper Id: 212 [Abstract]

Bulk nanostructure materials are characterized by high specific strength, hardness, corrosion, and wear resistant properties, and in particular, conditions by super-plasticity [1, 2, 3]. They exhibit specific electrical, thermal, magnetic, optical, chemical and other properties. Accordingly, the demand on nanoparticles and bulk nanocomposites in increased for practical application. Therefore, the development of new technologies for fabrication of bulk nanocomposites is big challenge. This paper consists of an experimental investigation and manufacture of multifunctional bulk nanostructured composite materials in Ti-Al-B-C, Si-B-C, SiC-B-C B₄C-SiC, B₄C-Si-C systems. The coarse crystalline Ti, Al, amorphous Boron and Carbon (Graphite) elementary pure (at least 98%) powders were used as precursors. The blend with different percentage contents of the powders were prepared. The high energetic "Fritsch" Planetary ball mill was used for blend processing, mechanical alloying, amorphization, and nanopowder production. The time of processing varied in range of: 1-36h. The optimal technological regimes for nanopowder preparation are determined experimentally. Ball milled blend compacted by explosive consolidation technology and bulk composite materials are fabricated. For shock wave generation, the industrial explosives and new explosives obtained from decommissioned weapons were used in the experiments. The technological parameters of the explosive consolidation and the structure-properties relationship are presented and discussed in the paper.

References:
[1] The Second World Space Congress, 10-19 October, 2002, Houston, TX, USA., I-4-03IAF, 34th COSPAR Scientific Assembly
[2] R. Mania, M. Dabrowski et all, International Journal of Self-Propagating High-Temperature Synthesis. 2003 v. 12, #3, 159-164
[3] R.M. Da Rocha, Chapter in Ceramic Engineering Science Proceeding, Jan., 2010