W. R. Grace Co.-conn.

Other

Michael P Dallaire

Neal Steven Berke

Awdhoot V Kerkar

Ellis M Gartner

Ahmad Arfaei

Maria C Hicks

Timothy J Martin

Angel Abelleira

A cement admixture composed of a mixture of lower alkyl ether oxyalkylene adducts with a sulfonated organocyclic material to provide cement compositions of mortar and concrete which inhibit drying shrinkage while attaining very high slump and/or increased compressive strength.

Cement composition

A cement admixture composition composed of an oxyalkylene compound and betaine. The betaine permits air entrainment in the presence of the oxyalkylene compound, which is used as a shrinkage reduction aid.

Drying shrinkage cement admixture

A concrete composition capable of inhibiting shrinkage of structural concrete structures is disclosed. The concrete is formed with an admixture composed of at least one secondary/tertiary alkanediol.

Composition and method for inhibiting drying shrinkage of concrete

A cement admixture composition composed of a mixture of alkylene glycol and fume silica to provide a means of inhibiting drying shrinkage and enhancing compressive strength.

A cement admixture composed of a mixture of certain lower alkyl ether oxyalkylene adducts with certain higher alkylene diols to provide cement compositions of mortar and concrete which inhibit drying shrinkage while permitting substantial air entrainment and enhanced compressive strength.

A cement admixture composition composed of at least one oxyalkylene compound and an ammonium salt of tall oil fatty acid.

Cement admixture capable of inhibiting drying shrinkage and method of

A fluid, stable aqueous dispersion of silica fume and alkali or alkaline earth metal nitrite salt. The dispersion contains a water soluble alkylene glycol.

Cement admixture

A cement admixture composed of a low molecular weight oxyalkylene compound and a comb polymer having carboxylic acid groups and oxyalkylene units therein.

An additive combination for hydraulic cement compositions is provided which advantageously provides corrosion inhibition and set acceleration, in combination with a high level of fluidity and retention of fluidity over a desired period of time. The cement additive combination comprises an alkali or alkaline earth metal nitrite and a graft copolymer plasticizer comprising a polyether backbone and side chain polymers formed by polymerization of ethylenically unsaturated monomers. Fluid hydraulic cement compositions are further provided comprising these additive combinations.

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Dover, NH, United States of America

Michael P Dallaire