Ultrafine cementitious grout

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

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Details

106672, 106678, 106724, 106725, 106726, 106809, 106816, 106819, 106823, C04B 1416, C04B 2416

Patent

active

057762449

ABSTRACT:
An ultrafine cementitious grout having a particle size 90% of which are less than 6 .mu.m in diameter and an average size of about 2.5 .mu.m or less, and preferably 90% of which are less than 5 .mu.m in diameter and an average size of about 2 .mu.m or less containing Portland cement, pumice as a pozzolanic material and superplasticizer in the amounts of about 40 wt. % to about 50 wt. % Portland cement; from about 50 wt. % to about 60 wt. % pumice containing at least 60% amorphous silicon dioxide; and from 0.1 wt. % to about 1.5 wt. % superplasticizer. The grout is mixed with water in the W/CM ratio of about 0.4-0.6/1. The grout has very high strength and very low permeability with good workability. The ultrafine particle sizes allow for sealing of microfractures below 10 .mu.m in width.

REFERENCES:
patent: 4963191 (1990-10-01), LaFleur
patent: 5121795 (1992-06-01), Ewert et al.
patent: 5125455 (1992-06-01), Harris et al.
patent: 5151126 (1992-09-01), Ranc et al.
patent: 5346012 (1994-09-01), Heathman et al.
Kosmatka et al., "Design and control of concrete mixtures", thirteenth edition, PCA, p. 64, 1988 (no month).

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