Method and apparatus for spraying an inorganic hydraulic material composition containing reinforcing short fibers
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United States of America Patent
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Jul 4, 1989
Grant Date -
N/A
app pub date -
Jul 21, 1987
filing date -
Jul 30, 1986
priority date (Note) -
Expired
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Abstract
An inorganic hydraulic material composition containing reinforcing short fibers is sprayed without breakage thereof, by fluidizing reinforcing short fibers in a blast of compressed air, by blending the flow of the reinforced short fibers fluidized in the blast of compressed air with a dry mixture of an inorganic hydraulic material such as cement with an aggregate such as sand in a dry blending region, by introducing the resultant dry blend into a water-mixing region, by mixing the dry blend with water, and by spraying the resultant wet composition through a spray nozzle.
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