Admixtures and method for accelerating the setting of...

Details Admixtures and method for accelerating the setting of... Admixtures and method for accelerating the setting of...

C - Chemistry, Metallurgy

04

B

261/50

C04B 28/04 (2006.01)

Patent

CA 1078415

ADMIXTURES AND METHOD FOR ACCELERATING THE SETTING OF PORTLAND CEMENT COMPOSITIONS ABSTRACT OF THE DISCLOSURE A method of and compositions for accelerating the setting time of portland cement compositions are disclosed. Cer- tain admixtures, comprising water-soluble carbonates and .alpha.- hydroxy carbonyl compounds, are employed as accelerators. Pre- ferred accelerators further comprise water-soluble organic com- pounds having a plurality of hydroxyl groups. 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.

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