Abstract
Hydrated cement pastes, prepared from Portland cements with different degrees of dispersity obtained by adding small quantities of triethanol amine and ethylene glycol as a grinding aids were investigated. The adsorption isotherms of benzene vapor on the pastes were interpreted by means of the Brunauer - Emmet - Teller (BET), N - layer Brunauer - Emmet -Teller (N - BET) and Huttig equations. The monolayer capacity and specific surface areas of the pastes after 28 days of hydration were determined. By comparison of the results obtained using different equations, the most suitable equation could be selected and used to determine the monolayer capacity and specific surface area. The influence of the dispersity of the cement on the specific surface area of the cement gel in the pastes could also be analyzed from the obtained results. The investigations were in accordance with the results of the physical mechanical properties of cement plasters.
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