In the article the analysis of the IR spectra of concrete based cement M400 and MD, manufacturer «Angarskcement». The concrete had a different degree of thermal damage. It is established that differentiate the concrete is exposed to temperatures over 600 °C can be at the peak of portlandite (3640 cm -1) high intensity, low intensity, or absence, of a broad peak in the region of 3450 cm -1, characteristic of the OH groups of another nature.
concrete, cement, fire, infra-red spectroscopy
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