ON APPLICATION OF MATERIALS BASED ON DISPERSE HYDRATED CALCIUM SILICATE FOR PROTECTIVE LAYER OF LOCAL AUTOMOBILE ROADS

Road construction is one of the most material-intensive industrial production. In this context, the urgent task for this branch is the maximum reduction in consumption of materials through usage of effective local materials, decrease energy intensity of processes by using new materials. The developed network of local roads require constant care and maintenance, thus it is advisable to consider the use of protective coatings for such roads on the basis of contactcondensation hardening, which can be obtained on the basis of local raw materials. One of the representatives of such material is disperse hydrated calcium silicate, which found wide practical application as the main components in the production of building materials, glass, glass ceramics and ceramic products. For example, relatively cheap highly dispersed crystalline material is intermediate product of hydrochemical synthesis of wollastonite xonotlite Ca₆(Si₆O₁₇)(OH)₂. A variety of calcium and silicon-containing raw materials, suitable to obtain various types hydrated calcium silicate, as well as increasing requirements for physical and chemical properties, caused by actuality of problems of search and study the best ways of synthesis hydrated calcium silicate from man-made and natural materials. The theoretical basis of the proposed technology for material production for road pavement lower categories is the ability of silicate dispersed materials transferred in an unstable state, forming a rock-like waterproof body at the time of application of mechanical load. Disperse hydrated calcium silicate are the most typical representatives of contactcondensation hardening binders. It should be noted that the technology of obtaining these binders is not related to high-temperature processes and the synthesis of HCS realized when wet treatment of available cheap raw materials on the standard equipment, what determines their practical significance.

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