Workable cementitious compositions

Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing

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106724, 106725, 106726, 106727, 106728, 106804, 106805, 106808, 106809, 106810, 106819, 106822, 106823, C04B 2400, C04B 2416

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056096810

ABSTRACT:
A process for modifying the slump of a concrete or mortar by the addition at different times of a water-soluble poly(alkylene oxide) and a .beta.-naphthalene sulphonate-formaldehyde condensate, a plasticizer or superplasticizer which is selected from lignosulphonates, melamine sulphonate formaldehyde condensates, carboxylates and selected styrene-maleic anhydride copolymers. The poly(alkylene oxide) is preferably partially replaced by a (hydroxy)alkyl cellulose. The process is advantageously used in shotcreting.

REFERENCES:
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patent: 4746364 (1988-05-01), Kawai et al.
patent: 4746367 (1988-05-01), Meyer
patent: 5085708 (1992-02-01), Moriya et al.
patent: 5158996 (1992-10-01), Valenti
patent: 5176753 (1993-01-01), Brook
patent: 5203919 (1993-04-01), Bobrowski et al.
patent: 5223036 (1993-06-01), Koyata et al.
Patent Abstracts of Japan, vol. 13, No. 134, C-581, Abstract of JP, A, 63-297255, Dec. 5, 1988.
Patent Abstracts of Japan, vol. 14, No. 261, C-725, Abstract of Japan, A, 2-74547, Mar. 14, 1990.
Chemical Abstract No. 109:10851, abstract of Japanese Plant Specification No. 63-50356 (Mar, 1988).

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