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:
-
- Albuquerque, NM
- Issue Date:
- Research Org.:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- OSTI Identifier:
- 871679
- Patent Number(s):
- 5776244
- Assignee:
- Sandia Corporation (Albuquerque, NM)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B02 - CRUSHING, PULVERISING, OR DISINTEGRATING B02C - CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
- 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 = {Thu Jan 01 00:00:00 EST 1998},
month = {Thu Jan 01 00:00:00 EST 1998}
}