Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...
Patent
1977-12-12
1981-04-28
Rutledge, L. Dewayne
Compositions: coating or plastic
Coating or plastic compositions
Metal-depositing composition or substrate-sensitizing...
106315, C04B 702
Patent
active
042643686
ABSTRACT:
A method of and compositions for accelerating the setting time of portland cement compositions are disclosed. Certain .alpha.-hydroxy carbonyl compounds in particular ranges of concentrations relative to the cement are employed as accelerators. The concentration of admixture relative to cement necessary to achieve acceleration depends upon the identity of the admixture, the water-cement ratio, and the amount and type of aggregate in the composition, among other factors. The accelerators are especially useful in shotcrete applications.
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Rutledge L. Dewayne
Sheehan John P.
Sika Chemical Corporation
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