Evaluation of Performance of Mold-Releasing Agents for Polyester Resin Concrete (or Polymer Concrete)

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Title: Evaluation of Performance of Mold-Releasing Agents for Polyester Resin Concrete (or Polymer Concrete)

Author(s): Y. Ohama and K. Demura

Publication: Special Publication

Volume: 69

Issue:

Appears on pages(s): 179-188

Keywords: aggregates; compacting; molds; parting agents; polyester resins; polymer concrete; resin concrete; shear tests; tension tests; vibration.

Date: 8/1/1981

Abstract:
The objective of this study was to find an appropriate method of evaluating mold-releasability ofmold-releasingagents for polyester resin concrete. A tension or shearing test involving resin concrete cast in thin frames on steel plates coated with mold-releasing agents was selected as an appropriate method. BY apply- ing this method, 17 commercially available mold-releasing agents were tested and evaluated for mold-releasability. The effect of vibrating compaction on the mold-releasability was also examined. It is concluded from the results that the mold-releasability of silicone and fluorine-containing agents is excellent, and that generally it is considerably affected by vibrating compaction.