Ultrasonic assessment of Portland cement at the early stages of hydration

A technique based on the reflection of ultrasonic waves in a semi-infinite mode was applied to a fresh Portland cement paste (water/cement ratio = 0.4 in weight) when it transformed from a viscous liquid to a solid phase within a few hours. The changes in the ultrasonic wave velocity allow the detec...

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Bibliographic Details
Published inJournal of materials science letters Vol. 18; no. 16; pp. 1335 - 1337
Main Authors GIMET, N, FARGEOT, D, GAILLARD, J. M, SMITH, A, GAULT, C, BONNET, J. P
Format Journal Article
LanguageEnglish
Published Dordrecht Kluwer Academic Publishers 01.01.1999
Subjects
Applied sciences
Buildings. Public works
Cement concrete constituents
Cements
Exact sciences and technology
Hydration
Materials
Properties of anhydrous and hydrated cement, test methods
Water cement ratio
Hydration
Cement paste
Measurement result
Experimental study
Portland cement
Computing method
Wave reflection
Ultrasonic method
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Summary:A technique based on the reflection of ultrasonic waves in a semi-infinite mode was applied to a fresh Portland cement paste (water/cement ratio = 0.4 in weight) when it transformed from a viscous liquid to a solid phase within a few hours. The changes in the ultrasonic wave velocity allow the detection of the cement transformation from a liquid to a solid. Shrinkage is also associated with this modification. Marked changes of the reflection coefficient occur later, from 510 to 600 min, and are possibly connected with interface phenomena which depend on the chemical composition of the cement. 10 refs.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0261-8028
DOI:10.1023/A:1006630215606