Centrifugally molded concrete composite pipe

Details Centrifugally molded concrete composite pipe Centrifugally molded concrete composite pipe

1989-10-03

1990-12-11

Bryant, III, James E.

Pipes and tubular conduits

Reinforced

With embedded element

138174, 138DIG6, 264269, F16L 908

Patent

active

049762915

ABSTRACT:
A concrete-type composite pipe having a cylindrical concrete layer and a corrosion protective layer formed in an inner surface of the drum mold; in a boundary region between the concrete layer and the corrosion protective layer, an intermediate resin/concrete layer having properties intermediate the concrete layer and the corrosion protective layer. The above mentioned concrete-type composite pipe is produced by rotating the drum mold while casting concrete thereinto to form a concrete layer of a uniform thickness using a centrifugal force exerted on the cast concrete, casting a mixture of hydrophilic resin and a hardener to form a resin layer on an inner surface of the formed concrete layer before the concrete layer starts to solidify, scattering aggregates or the like on the inner surface of the resin layer, accelerating the rotation to cause the aggregates or the like in the resin layer to form a corrosion protective layer of resin and aggregates and stopping the rotation after the hardening of the corrosion protective layer.

REFERENCES:
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patent: 2624097 (1953-01-01), Kistler
patent: 2675333 (1954-04-01), Trout et al.
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patent: 3080253 (1963-03-01), Dietz et al.
patent: 3177902 (1965-04-01), Reubenstein
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patent: 3561493 (1971-02-01), Maitlord et al.
patent: 3742985 (1973-07-01), Rubenstein
patent: 4412561 (1983-11-01), Sakaguchi et al.

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