FIELD: chemistry.
SUBSTANCE: invention relates to composition of mineral expansion agent and can be applied in production of cement used for grouting joints of built-up ferroconcrete constructions, water-proofing joints of hydrotechnical structures, production of ferroconcrete pressure pipes. Mineral cement expansion agent contains, mass %: Glauber's salt 20.0-30.0, magnesium oxide 35.0-40.0, pyrite cinder 2.0-3.0, highly-aluminous slag 25.0-30.0, double-water gypsum 3.0-7.0.
EFFECT: increase of degree of cement expansion.
1 tbl
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Authors
Dates
2008-08-27—Published
2007-01-25—Filed