Requirements for Normal Consistency, Water Demand and Water Separation of Cements for Transport Construction

At present, in the Russian Federation, there are several parallel standards on cement for the transport construction which differ by technical requirements for production quality. The comparative data on the regulatory requirements for the quality indexes of cement for the transport construction with regard to water set out in various regulatory documents of the RF and foreign countries are presented. It is shown that in ASTM and European norms there is no such indicator of cement quality as water separation. Regulation of this indicator of cement at cement factories is impossible since it is among the uncontrolled parameters. Analysis of the technical literature shows that the water separation of cement does not carry any technological load when producing the concrete mix. The water separation of the concrete mix depends on many factors, and first of all on the composition of the concrete mix itself and quality of its mixing. It is proposed to replace this indicator of cement quality with the indicator of “normal consistency” in the standard GOST P 55224–2012.

L.D. SHAHOVA, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
R.A. KOTLIAROV, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

OOO “Polyplast Novomoskovsk” (72, Komsomolskoye Highway, Novomoskovsk, 301661, Tula Region, Russian Federation)

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