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Title: Ultrafine cementitious grout

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.

Inventors:
 [1]
  1. (Albuquerque, NM)
Issue Date:
Research Org.:
SANDIA CORP
OSTI Identifier:
871679
Patent Number(s):
5776244
Assignee:
Sandia Corporation (Albuquerque, NM) SNL
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
ultrafine; cementitious; grout; particle; size; 90; diameter; average; preferably; containing; portland; cement; pumice; pozzolanic; material; superplasticizer; amounts; 40; wt; 50; 60; amorphous; silicon; dioxide; mixed; water; cm; ratio; 4-0; strength; permeability; workability; sizes; allow; sealing; microfractures; below; 10; width; cementitious grout; portland cement; amorphous silicon; particle size; silicon dioxide; average size; particle sizes; pozzolanic material; fine particle; ultrafine cementitious; ultrafine particle; containing portland; /106/

Citation Formats

Ahrens, Ernst H. Ultrafine cementitious grout. United States: N. p., 1998. Web.
Ahrens, Ernst H. Ultrafine cementitious grout. United States.
Ahrens, Ernst H. Thu . "Ultrafine cementitious grout". United States. https://www.osti.gov/servlets/purl/871679.
@article{osti_871679,
title = {Ultrafine cementitious grout},
author = {Ahrens, Ernst H.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

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