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Microwave curing effects on the 28-day strength of cementitious materials

Sohn, Donggy / Johnson, D.L.

Microwave energy can be applied on the curing of the cementitious materials because of their water content. Isothermal heating, achieved best by feedback temperature control, is required to investigate properly the temperature effects on the properties. Type I Portland cement mortars, some with additions of appropriate amounts of pozzolanic material, such as slag, silica fume, or class F fly ash, were cured isothermally with feedback temperature control at several temperatures. The curing times were determined by the instrumented penetration test, and 28-day compressive strengths were measured. Optimum curing conditions were found for 40 degree C and 60 degree C, but 80 degree C was unsuitable for microwave curing.

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Microwave curing effects on the 28-day strength of cementitious materials

Sohn, Donggy / Johnson, D.L.

Microwave energy can be applied on the curing of the cementitious materials because of their water content. Isothermal heating, achieved best by feedback temperature control, is required to investigate properly the temperature effects on the properties. Type I Portland cement mortars, some with additions of appropriate amounts of pozzolanic material, such as slag, silica fume, or class F fly ash, were cured isothermally with feedback temperature control at several temperatures. The curing times were determined by the instrumented penetration test, and 28-day compressive strengths were measured. Optimum curing conditions were found for 40 degree C and 60 degree C, but 80 degree C was unsuitable for microwave curing.

Microwave curing effects on the 28-day strength of cementitious materials

Sohn, Donggy / Johnson, D.L.

Microwave energy can be applied on the curing of the cementitious materials because of their water content. Isothermal heating, achieved best by feedback temperature control, is required to investigate properly the temperature effects on the properties. Type I Portland cement mortars, some with additions of appropriate amounts of pozzolanic material, such as slag, silica fume, or class F fly ash, were cured isothermally with feedback temperature control at several temperatures. The curing times were determined by the instrumented penetration test, and 28-day compressive strengths were measured. Optimum curing conditions were found for 40 degree C and 60 degree C, but 80 degree C was unsuitable for microwave curing.

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Title:

Microwave curing effects on the 28-day strength of cementitious materials

Contributors:

Sohn, Donggy (author) / Johnson, D.L. (author)

Published in:

MRS-97, Materials Research Society Symposium on Advances in Materials for Cementitious Composites, 1997 ; 241-247

Cement and Concrete Research ; 29

Publication date:

1999

Size:

7 Seiten, 17 Quellen

ISSN:

DOI:

https://doi.org/10.1016/S0008-8846(98)00189-6

Type of media:

Conference paper

Type of material:

Print

Language:

English

Keywords:

Druckfestigkeit , Mikrowellenheizung , Temperatureinfluss , Mörtel , Wasserabbinden von Zement , Additiv , Flugasche , Puzzolanzement , Portlandzement , isotherme Bedingung

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