Ultrafine cementitious grout

Patent · Thu Jan 01 00:00:00 EST 1998

OSTI ID:871679

Ahrens, Ernst H ^[1]

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1. Albuquerque, NM

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.

• 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 5776244
• OSTI ID: 871679
• Country of Publication: United States
• Language: English

Related Subjects

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
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