CONCRETE

[:ru]Комохов П. Г.[:en]Komokhov, P. G.[:] [:ru]академик РААСН, д-р техн. наук, профессор[:en]Academician of Russian Academy of Architecture and Construction Sciences, Doct. Eng. Sc., Professor[:]

Alitinform №2 (03) 2008 г. 50-52 p.

Abstract

Metals and their alloys, silicate and aluminosilicate materials — cements, concrete, ceramics played the decisive role in ensuring progress of our civilization. Using of these materials serves as a base for our future tied with unusual and rapidly developing scientific branches of composite materials technologies.

However, the actual significance of the reliable application of cement concrete with nano-technology elements involved will be defined by its hyperprotective properties at a level of safe provision of requirements for radioactive wastes burial and leaching of long-living radionuclides with half-life of not less than 300 years.
Micromodification of composite cement materials structures by fulleroid nano-systems, such as natural fulleren-shungite, boron carbide (В4С) microsilica — is a new direction in manufacturing of protective construction materials. [1]

Essentially important direction of structuring of concrete on the boundary of contact between cement matrix — filler — extender with the energetic, chemical nature and ability to atomic-molecular assembly should be considered as strongly sought for reality at the formation hydrates of hard phase, especially in the structure of protecting from radiation concrete.

Relation of hardening cement composite to tempering water is considered to be of paramount importance, starting from mixing of initial hard phases with water or with water solutions and ensuring water-retaining capacity which is important for surfaces with contact strength, where big role is played by hydrogen bridges. Further concrete strength develops and in this optimum situation water should be bonded chemically — in crystals or gels.