Ultrafine cementitious grout

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872588

Ahrens, Ernst H ^[1]

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1. Albuquerque, NM

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.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• DOE Contract Number: AC04-94AL85000
• Assignee: Sandia Corporation (Albuquerque, NM)
• Patent Number(s): US 5968257
• OSTI ID: 872588
• Country of Publication: United States
• Language: English

Related Subjects

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
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