Features Of The Formation Of The Structure And Properties Of Aerated Concrete Due To Its Forced Carbonate Hardening

International Multi-Conference on Industrial Engineering and Modern technologies

Nikolaenko, E.^1 ; Lyubomirskiy, N.^1 ; Nikolaenko, V.^1

Department of Building Engineering and Materials Science, V.I. Vernadsky Crimean Federal University, Academician Vernadsky Prospekt, 4, Simferopol

295007, Russia^1

关键词: Aerated concrete;    Cement hydration;    Crystalline hydrates;    Physicochemical process;    Physicochemical transformation;    Porous concretes;    Strength characteristics;    Structure and properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/463/3/032034/pdf
DOI  :  10.1088/1757-899X/463/3/032034

来源: IOP

【 摘 要 】

The results of experimental studies on the establishment of the possibility of using carbon dioxide in the production of concrete for the purpose of improving its strength characteristics are presented. Specific features of physicochemical transformations occurring in the body of porous concrete during the organization of its hardening in environments with a high concentration of carbon dioxide are revealed. It was found that when lime is introduced into the cement binder composition, the degree of carbonation of portland cement hydration products decreases. It was shown that with successive steaming and forced carbonization of porous concrete on the basis of cement and cement-lime binder, conditions for both hydration and carbonate hardening are provided. This causes the appearance of a maximum amount of crystalline hydrate and carbonate neoplasms, which increases the strength of the material. The revealed features of the physicochemical processes of carbonization of cement and cement-lime systems allow us speak about the effectiveness of the use of man-made CO2 in the technology of production of unreinforced concrete products.