Formwork Pressures and Cement Replacement by Fly Ash


  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: Formwork Pressures and Cement Replacement by Fly Ash

Author(s): N. J. Gardner,

Publication: Concrete International

Volume: 6

Issue: 10

Appears on pages(s): 50-55

Keywords: concrete construction; fly ash; formwork (construction); fresh concretes; lateral pressure; loads (forces); placing; temperature; vibration.

Date: 10/1/1984

A continuing experimental investigation into factors influencing the pressure exerted by fresh concrete on vertical form faces is described. The conclusion is that formwork pressures increase with the rate of place-ment, vibrator immersion, slump, decrease in temperature, and increasing percentage cement replacement by fly ash. An equation is developed to conservatively calculate lateral pressures for formwork design purposes.