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improve the strength and durability of subbase material. This paper presents a lab investigation to study the effect of adding PSA on the mechanical properties of granular materials, which conventional used as a subbase course used in roads, highways

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Abstract  

Relationships have been established between the average conversion degree and the dissociation time for polydisperse granular material, taking its grain size distribution into account. It has been checked in which cases the kinetic curves obtained by a numerical solution can be described in terms of KEKAM equation.

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Abstract  

Relationships have been established between the average conversion degree and the dissociation time for polydisperse granular material, taking into account its grain size distribution. It has been checked in which cases the kinetic curves, obtained by a numerical solution, can be described in terms of equations R2 and F0.

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Abstract  

Relationships between average degree of transformation and time of dissociation were derived for polydisperse granular materials with account to the type of grain size distribution. It has been checked, under what conditions the kinetic curves obtained by numeric solution of those relationships may be described in terms of equations D1 α2=kt
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, F2 [1/(1 - α) - 1 =kt] and F3 [1/(1 - α)2 - 1=kt].
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The phenomenon of friction reduces efficiency of almost all machines in practice. In order to reduce the deficits, we have to understand this phenomenon and have to take it into consideration during design in all cases. Nevertheless, in certain cases describing of a friction process is very difficult, because it depends on a lot of parameters. In case of polymers, granular materials or in geology, the rate and state dependent friction have great importance. In this paper, velocity and time dependent friction is examined with the help of a direct shear apparatus, which was developed in our earlier work.

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Solid ZrOCl2·8H2O was added in a slow stream to a solution of phosphoric acid or to a solution of TiCl4 in phosphoric acid to obtain granules of amorphous Zr(HPO4)2·nH2O or ZrxTi(1–x) (HPO4)2·nH2O(where x=0.95–0.80). Half of each product had been soaked in ethanol to produce alcohol solvated materials. It was found that the particle size of the resulting materials is very similar to that of ZrOCl2·8H2O, in such a way that it may be controlled indirectly. These materials are suitable for ion-exchange column operations. The relatively high gamma radiation doses of60Co source did not alter its exchange properties. pH-titrations were performed by an automatic titrimeter and the exchange capacities of alkali metal ions were determined by isotopic tracer technique. Effect of drying temperature on the ion exchange properties of Na+, K+ and Cs+ on the granular materials have been studied. Other characterizations were made by usual chemical analysis and thermography.

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– 52 . [9] Gyachev , L. V ( 1968 ) The movement of granular materials in pipes and tankers . Moscow : Machine building , 184 p. [10

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. Kruyt , N.P. , Rothenburg , L. , ( 2001 . Statistics of the elastic behaviour of granular materials . Int. J. Solids Struct . 4879 – 4899 . Liu Yan

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can be decreased by including supplementary cementitious materials in concrete production and also in granular materials [ 1 ]. Concrete is mostly used in the construction of highways, dams, residential buildings and industrial structures. Concrete in

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control gates, the stilling basin, and downstream riverbed from. The downstream riverbed was created from a granular material (grain size 2–5 mm), to enable scour creation and assess effects of investigated fortifications on scour development. The grain

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