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Title: Ultrafine cementitious grout

Abstract

An ultrafine cementitious grout is described having a particle size 90% of which are less than 6 {micro}m in diameter and an average size of about 2.5 {micro}m or less, and preferably 90% of which are less than 5 {micro}m in diameter and an average size of about 2 {micro}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 {micro}m in width. 4 figs.

Inventors:
Issue Date:
Research Org.:
Sandia Corporation
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
672513
Patent Number(s):
5,776,244
Application Number:
PAN: 8-707,931
Assignee:
Sandia Corp., Albuquerque, NM (United States) SNL; SCA: 360606; 360603; PA: EDB-98:120115; SN: 98002024859
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 7 Jul 1998
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SEALING MATERIALS; PARTICLE SIZE; PORTLAND CEMENT; RHYOLITES; PLASTICIZERS; COMPRESSION STRENGTH; PERMEABILITY

Citation Formats

Ahrens, E.H. Ultrafine cementitious grout. United States: N. p., 1998. Web.
Ahrens, E.H. Ultrafine cementitious grout. United States.
Ahrens, E.H. Tue . "Ultrafine cementitious grout". United States.
@article{osti_672513,
title = {Ultrafine cementitious grout},
author = {Ahrens, E.H.},
abstractNote = {An ultrafine cementitious grout is described having a particle size 90% of which are less than 6 {micro}m in diameter and an average size of about 2.5 {micro}m or less, and preferably 90% of which are less than 5 {micro}m in diameter and an average size of about 2 {micro}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 {micro}m in width. 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {7}
}