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2 148 039

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C1

(51)

IPC

(21) (22)

Application

98116029/03, 1998-08-24

(24)

Start date

1998-08-24

(22)

Actual filing date

1998-08-24

(45)

Published

2000-04-27

(72)

Inventor

Svatovskaja L.B.Sycheva A.M.Smirnova T.V.Uman' N.I.Solov'Eva V.Ja.Ovchinnikova V.P.

(73)

Holder

Sankt-Peterburgskij Gosudarstvennyj Universitet Putej Soobshchenija

COMPLEX ADDITIVE Russian patent published in 2000 - IPC

Abstract RU 2148039 C1

FIELD: building materials, more particularly concreting at subzero temperatures. SUBSTANCE: complex additive comprises potassium chromate, solid porous catalyst, ratios of components being as follows, wt.%: potassium chromate, 40-60; and solid porous catalyst 40-60. EFFECT: greater compression strength at lower temperatures and reduced frost resistance. 1 tbl

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RU 2 148 039 C1

Authors

Svatovskaja L.B.

Sycheva A.M.

Smirnova T.V.

Uman' N.I.

Solov'Eva V.Ja.

Ovchinnikova V.P.

Dates

2000-04-27—Published

1998-08-24—Filed

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