Issue 24

E. M. Nurullaev et alii, Frattura ed Integrità Strutturale, 24 (2013) 69-74 ; DOI: 10.3221/IGF-ESIS.24.06 69 Special Issue: Russian Fracture Mechanics School Optimization of fractional composition of the excipient in the elastomeric covering for asphalt highways E. M. Nurullaev, A. S. Ermilov Perm National Research Polytechnic University. 614990 Perm, Komsomol prospect, 29. A BSTRACT . The computational method of optimum fractional composition of a dispersible filler of polymeric composite on the basis of three-dimensionally linked elastomer is developed according to non-linear programming. The coefficient of dynamic viscosity of polymeric suspension or the initial module of a viscoelasticity of the join solidification low-molecular rubbers with the final functional groups, filled by many fractional dioxide of silicon are considered as criteria of optimization. Influence of the limiting volume filling on energy of mechanical destruction was investigated. The elastomeric material is offered for use as a covering of asphalt highways in the form of a frost-proof waterproofing layer, which allowing multiply to increase operating properties. K EYWORDS . Viscosity; Mechanical destruction; Elastomeric composites with a dispersed filler; Rheology; Rubber; Polymeric binder; Asphalt highways. I NTRODUCTION ractional composition of a dispersed filler is essential for formation of rheological behavior of suspensions on the basis of fluid and viscid polymeric binding and mechanical characteristics of three-dimensionally linked filled elastomers. At the same time the major parameter of composition is effective extent of volume filling – / m   , herein  – volume proportion of solids of an filler, m  – the limiting extent of volume filling depending on a form of particles and their distribution by the size, and also from physical and chemical interaction on border "a filler - a binder". Value m  can be defined by the viscometric method [1] or calculated by a combinatorial and multiplicative method [2]. Coefficient of dynamic viscosity  and the initial module of a viscoelasticity d E ,( 1) d with      are connected by a ratio (1): 2 / 1 1.25 1 / f f m r r o o m E E E                   (1) herein the "f" and "o" indexes fall into to the filled and free conditions of the polymeric binding. Energy (work) of destruction was estimated in the form of the envelope by curve of destruction [4] dependences of the conditional ultimate break tension b  (tension divided by the initial section of the sample) from break deformation b  , bound to degree of the relative elongation by ratio 1 /100% b b     . The line envelopes of around points of a break of exemplars and constructed in logarithmic scale (log log ) b b    , corresponds to energy of mechanical destruction in the form of the area of the chart of stretching in Cartesian coordinates: F