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Title: Ultrafine cementitious grout

Abstract

An ultrafine cementitious grout in three particle grades containing Portland cement, pumice as a pozzolanic material and superplasticizer in the amounts of about 30 wt. % to about 70 wt. % Portland cement; from about 30 wt. % to about 70 wt. % pumice containing at least 70% amorphous silicon dioxide; and from 1.2 wt. % to about 5.0 wt. % superplasticizer. The superplasticizer is dispersed in the mixing water prior to the addition of dry grout and the W/CM ratio is about 0.4 to 1/1. 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 National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
872588
Patent Number(s):
5968257
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Classifications (CPCs):
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; grades; containing; portland; cement; pumice; pozzolanic; material; superplasticizer; amounts; 30; wt; 70; amorphous; silicon; dioxide; dispersed; mixing; water; prior; addition; dry; cm; ratio; strength; permeability; workability; sizes; allow; sealing; microfractures; below; 10; width; cementitious grout; portland cement; amorphous silicon; particle size; silicon dioxide; 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., 1999. Web.
Ahrens, Ernst H. Ultrafine cementitious grout. United States.
Ahrens, Ernst H. Fri . "Ultrafine cementitious grout". United States. https://www.osti.gov/servlets/purl/872588.
@article{osti_872588,
title = {Ultrafine cementitious grout},
author = {Ahrens, Ernst H},
abstractNote = {An ultrafine cementitious grout in three particle grades containing Portland cement, pumice as a pozzolanic material and superplasticizer in the amounts of about 30 wt. % to about 70 wt. % Portland cement; from about 30 wt. % to about 70 wt. % pumice containing at least 70% amorphous silicon dioxide; and from 1.2 wt. % to about 5.0 wt. % superplasticizer. The superplasticizer is dispersed in the mixing water prior to the addition of dry grout and the W/CM ratio is about 0.4 to 1/1. 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 = {1999},
month = {1}
}

Patent:

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