Porous aggregate for light-weight concrete

Details Porous aggregate for light-weight concrete Porous aggregate for light-weight concrete

1974-11-25

1978-06-20

Douglas, Winston A.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106 90, 106 97, 260 37AL, C04B 702

Patent

active

040959953

ABSTRACT:
To prevent the escape of water into the porous aggregate of light-weight concrete at the time of pumping, the individual particles of the additive, which, with cement slurry, forms a gel-like protective layer, which is scarcely permeable to water, for a period of time, and which facilitates a bond between the aggregate and the cement. The protective layer can be produced by spraying a solution, in particular an aqueous solution of the additive into the aggregate particles, which are heated to a temperature above the boiling point of the solvent, and by evaporating the solvent.

REFERENCES:
patent: 2592345 (1952-04-01), Schnell
patent: 2650171 (1953-08-01), Schaaf
patent: 3027266 (1962-03-01), Wikne
patent: 3131075 (1964-04-01), Brooks
patent: 3759729 (1973-09-01), Fahn
patent: 3812076 (1974-05-01), Previte et al.
patent: 3847630 (1974-11-01), Compernass et al.
patent: 3956230 (1976-05-01), Gaylord

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