Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing
Reexamination Certificate
2011-08-02
2011-08-02
Marcantoni, Paul (Department: 1731)
Compositions: coating or plastic
Coating or plastic compositions
Inorganic settable ingredient containing
C106S713000, C264S333000, C264SDIG043
Reexamination Certificate
active
07988782
ABSTRACT:
Synthetic fibers, such as polypropylene fibers, are mixed in a shrinkage compensating concrete to provide restraint in lieu of conventional steel reinforcement used in a shrinkage compensating concrete. While the synthetic fibers have a low elastic modulus and low strength, they act to restrain expansion of the concrete in the same way that conventional steel rebar does. In addition, only a small amount of the synthetic fibers are needed to restrain the expansion. As a result, shrinkage compensating concrete can be used in more varied applications, and can be provided more quickly, easily and inexpensively. Construction time requirements and expenses of concrete structures are correspondingly reduced.
REFERENCES:
patent: 4968561 (1990-11-01), Mizobe et al.
patent: 6933038 (2005-08-01), Nanko et al.
patent: 6969423 (2005-11-01), Li et al.
Materials by Design, Elastic Modulus, www.mse.cornell.edu/courses/engri111/modulus.htm (2 pages and provides Modulus of Elasticity for various materials in Giga Pascals. No date available.
Modified Portland Cement (Expansive cement), one page from www.fhwa.dot.gov/infrastructure/materialsgrp/cement.html. Dept of Transportation information from internet, no date available.
Bescher Eric
de Bruyn Kyle
Flax David
Goods Daniel
Rice Edward K.
Marcantoni Paul
Ohriner Kenneth H.
Perkins Coie LLP
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