Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1998-01-14
1999-11-09
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
106703, 106713, 106727, 106797, 106823, 428364, 428369, 428370, 428371, 428375, 428378, 428383, 428400, 428401, 428606, 524 2, 524 7, E04C 500, B32B 2700
Patent
active
059816309
ABSTRACT:
Fiber additives for addition to proportioned concrete comprise a plurality of thermoplastic fibers having a profile geometry defined by the equation, ##EQU1## wherein the amplitude a.sub.0 falls within a range of from about 0.1 d.sub.f to 2.0 d.sub.f and the period .lambda. falls within a range of from about 2 d.sub.f to 15 d.sub.f for fibers having a diameter d.sub.f of from about 0.5 to about 1 mm; the peak pull-out stress .sigma..sub.peak and the specific pull-out energy absorbed to a maximal displacement of 7.5 mm .psi..sub.peak, both increase linearly with a deformity factor defined by the equation, ##EQU2## where .alpha.=0.8 and .beta.=-1, such that the peak pull-out stress is defined by the equation, ##EQU3## and the specific pull-out energy is defined by the equation, ##EQU4## the fiber additives having an optimimum deformity,
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Banthia et al., "Concrete Reinforced With Deformed Steel Fibers Bond-Slip Mechanisms" ACI Materials Journal, V. 91, No. 5, Sep.-Oct., 1994.
Banthia Nemkumar
Dubey Ashish
Hingson Richard E.
Acquah Samuel A.
Synthetic Industries, Inc.
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