Plastic Forms for Architectural Concrete


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Title: Plastic Forms for Architectural Concrete

Author(s): J. A. Hanson

Publication: Journal Proceedings

Volume: 56

Issue: 5

Appears on pages(s): 1137-1148

Keywords: none

Date: 5/1/1960

Pleasing and unusual architectural effects in concrete are being obtained by the use of forms made of plastics. The architectural treatment may consist of both surface finish and bold pattern decoration. The concrete surfaces can be either glossy-smooth or textured. In either case, the surface is Free of open air and water pockets. No special facing mixes, no parting agents, and no polishing or grinding are required. The extremely Fine smooth finish of plastic-Formed concrete greatly improves the attractiveness Of integral colors, and due to the high reflectivity, smaller amounts of pigment are required to obtain a given color intensity. A considerable number of reuses are obtainable with the plastic Forms, thus reducing the cost through multiple use. Laboratory tests established optimum curing condi-tions for this type of architectural concrete. It was Found that temperature control is important if a high degree of reflectivity is desired. Although the present development of plastic forms was initiated only 3 years ago, a considerable number of applications have been made in the field. Several of these are described.