Low porosity cement and process for producing same

Details Low porosity cement and process for producing same Low porosity cement and process for producing same

1975-04-21

1976-06-01

Poer, J.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 97, 106 98, 106315, C04B 735

Patent

active

039605825

ABSTRACT:
A method is disclosed for making low-porosity, free-flowing cement pastes with extended set times, improved workability and reduced expansion due to alkali aggregate reactions by combining hydraulic cements, especially portland-type cements, ground without gypsum with from 0.1 to about 1.0% of an alkali or alkaline earth lignosulfonate or sulfonated lignin, and 0.1 to 2.0% of an alkali bicarbonate, and combining with 20 to 40% water. Mixtures of aggregates with such low-porosity pastes made according to this process produce very workable mortars and concretes with extended set times and upon hardening have reduced expansion.

REFERENCES:
patent: 3689294 (1972-09-01), Brunauer
patent: 3782984 (1974-01-01), Allemand et al.

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