Abstract
The processes of structure formation of hardening compositions based on hybrid binders as well as the controlled change of these processes allow obtaining concretes with increased strength and durability, for example, lightweight structural concretes on porous aggregates. Control of the structure formation of such concretes allows improving the quality and operational reliability of buildings and structures, saving binders, expanding the kinds of raw materials and solving environmental and economic issues. The results of the experiments have showed that the fineness of the hybrid binder effect the properties of the contact zone between the expanded clay aggregates and the cement matrix including the formation of calcium hydrosilicates on the surface of expanded clay gravel, which increases the adhesive strength. This leads to the increase of the quality of lightweight concrete based on expanded clay gravel.
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