13 Aug

The ABCs of Concrete Resistance

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Resistance of concrete is the ability of a material to maintain its properties for a long time: fire and heat resistance, cold resistance, resistance of concrete to chemically aggressive environment, water and gas, maintaining its performance when working in adverse environmental conditions without significant damage and destruction. The article is prepared in collaboration with Telling Company experts, a successful UK-based engineering enterprise, massively utilising hydraulic lime, lime mortar and concrete solutions in its projects.

Resistance factors in a nutshell

A particularly high expansion of concrete hardening occurs during the formation of calcium sulfoaluminate. Concrete corrosion can occur if there is moisture in the air, and various acid gases. For example, sulfur dioxide discharged from furnace boilers, locomotives or sets of certain chemicals combines with moisture in the air and water vapor to form sulfuric acid, which destroys the concrete as well as the free acid in aqueous medium. Processes of chemical corrosion of concrete can not be considered independently of the physical and physico-chemical processes occurring in the concrete under the influence of an aqueous or gaseous medium. A crucial impact, in particular, has a three-dimensional deformation, resulting moisture exchange (absorption of water and its evaporation), the process of freezing and thawing, seepage and water filtration, diffusion processes, moving moisture in concrete, and so on. Read More