SPRAY MATERIAL AND SPRAYING WORK

PROBLEM TO BE SOLVED: To obtain a spray material excellent in the mechanical strength developability of the concrete sprayed therewith and slump holding ability at a high temperatures, by using a composition comprising cement, copolymer of a specific polyalkylene glycol monoalkenyl ether and maleic...

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Bibliographic Details
Main Authors KOBAYASHI AKIRA, ARAKI AKITOSHI
Format Patent
LanguageEnglish
Published 27.10.1998
Edition6
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
LIME, MAGNESIA
METALLURGY
MINING
ORGANIC MACROMOLECULAR COMPOUNDS
REFRACTORIES
SHAFTS
SLAG
THEIR PREPARATION OR CHEMICAL WORKING-UP
TREATMENT OF NATURAL STONE
TUNNELS
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Summary:PROBLEM TO BE SOLVED: To obtain a spray material excellent in the mechanical strength developability of the concrete sprayed therewith and slump holding ability at a high temperatures, by using a composition comprising cement, copolymer of a specific polyalkylene glycol monoalkenyl ether and maleic anhydride [hydrolyzate (salt)] and a defoaming agent. SOLUTION: This spray material is obtained by using a composition comprising cement, pref. 0.01-5.0 pts.wt., based on 100 pts.wt. of cement, of a copolymer [hydrolyzate (salt)] of a polyalkylene glycol monoalkenyl ether of the formula R1 O(AO)n R2 (R1 is a 2-5C unsaturated hydrocarbon group, pref. vinyl group; AO is a 2-4C oxyalkylene group, pref. oxyethylene group; (n) is 1-100; R2 is H, a 1-4C alkyl, pref. CH3 ) and maleic anhydride in the molar ratio of (1:2) to (2:1), and pref. 0.01-10 pts.wt., based on 100 pts.wt. of the copolymer, of a defoaming agent (e.g. polyether-based one).
Bibliography:Application Number: JP19970089474