The Use of a Continuous Mixer and a Fast-Setting Cement to Produce GFRC Architectural Products

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Title: The Use of a Continuous Mixer and a Fast-Setting Cement to Produce GFRC Architectural Products

Author(s): H. Ball Jr.

Publication: Special Publication

Volume: 260

Issue:

Appears on pages(s): 45-54

Keywords: fast-setting cement; glass fiber-reinforced concrete (GFRC); rapid demolding

Date: 6/1/2009

Abstract:
Typical demolding times of GFRC cast parts are typically 16 hours. This has limited the acceptance of GFRC, or any cement based product, into products requiring high volume production because of the high costs of multiple molds associated with a material chemistry with such long demolding times. This paper discusses a unique system utilizing Portland Type I cement, a fast setting cement and specially designed mixing equipment to process the material so that demolding times in the 1 to 2 hour range are possible. A conventional weight formula (128 pcf or 2048 kg/m3 ) and a lightweight formula (71 pcf or 1136 kg/m3) are available. For convenience, the formulas are supplied pre-blended.