Problems of Autoclaved Aerated Concrete Treatment

Abstract:

The problems of autoclave c of cellular concrete are considered. It was shown that the key problem of autoclaving is the appearance of areas of concrete with different dark colors and a reduced strength. The main reason for their occurrence is the presence of air in the porous space of cellular concrete, which prevents heat transfer. Cold air does not allow the concrete to warm up to a temperature of 170-175 °C, which hinders the flow of physical-chemical processes of hardening. The proposed activities that improve the quality of autoclave processing and precluding the formation of «non-steamings» in the concrete: ensure the temperature inside cellular concrete mass of at least 80 °C before curing, the vacuum (P=‒0.5 Bar) before pressure rise in the autoclave, preventing the ingress of air into the autoclave at the beginning of the process.

• Periodical: Solid State Phenomena (Volume 284)
• Pages: 1069-1073
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.284.1069
• Online since: October 2018
• Authors: Andrey Vishnevsky*, Fedor L. Kapustin
• Keywords: Autoclave, Cellular Concrete, Density, Steam Curing of Concrete, Strength, Temperature

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