Research of physical and chemical processes associated with corrosion of cements (“Caking”) in dampy wet air
https://doi.org/10.21822/2073-6185-2021-48-2-103-112
Abstract
Objective. The paper is aimed at clarifying the mechanism and kinetics of the processes leading to cement caking.
Methods. To determine phase composition, the following modern physical and chemical methods were used: XRF, derivatography and electron microscopy.
Results. The data obtained show that the “aging” of cements during their forced storage in humid air through the adsorption of water vapor, and then CO2, is associated with the processes of hydrolysis, hydration in surface layers of particles, is primarily relevant for the most reactive minerals of Portland cement clinker. The deepening of these processes also depends on the state of the corroded surface of minerals.
Conclusion. The work carried out makes it is possible to preliminarily outline storage conditions for freshly ground Portland cements (according to the kinetics of sorption – the storage duration, according to isotherms – the permissible relative humidity), at which the LOI value of commercial cement remains stable for the required minimum time.
About the Authors
A. A. Krutilin
Volgograd State Technical University (Sebryakov Branch)
Russian Federation
Russian Federation
Alexander A.Krutilin, Cand. Sci. (Technical), Assoc. Prof., Department of Building Materials and Special Technologies
21 Michurina Str., Volgograd region, Mikhailovka 403343
T. V. Krapchetova
Sebryakovtsement JSC
Russian Federation
Russian Federation
Tatiana V. Krapchetova, Analytical Engineer
2 Industrial'naya Str., Volgograd region, Mikhailovka 403343
N. A. Inkova
Volgograd State Technical University (Sebryakov Branch)
Russian Federation
Russian Federation
Nadezhda A.Inkova, Senior Lecturer, Department of Building Materials and Special Technologies
21 Michurina Str., Volgograd region, Mikhailovka 403343
O. K. Pakhomova
Volgograd State Technical University (Sebryakov Branch)
Russian Federation
Russian Federation
Olesya K.Pakhomova, Senior Lecturer, Department of Building Materials and Special Technologies
21 Michurina Str., Volgograd region, Mikhailovka 403343
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Review
For citations:
Krutilin A.A., Krapchetova T.V., Inkova N.A., Pakhomova O.K. Research of physical and chemical processes associated with corrosion of cements (“Caking”) in dampy wet air. Herald of Dagestan State Technical University. Technical Sciences. 2021;48(2):103-112. (In Russ.) https://doi.org/10.21822/2073-6185-2021-48-2-103-112
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