Hydration of Portoguese cements, measurement and modelling of chemical shrinkage

Lino Maia, Mette Rica Geiker, Joaquim A. Figueiras

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Development of cement hydration was studied by measuring the chemical shrinkage of pastes. Five types of Portuguese Portland cement were used in cement pastes with . Chemical shrinkage was measured by gravimetry and dilatometry. In gravimeters results were recorded automatically during at least seven days, dilatometers were manually recorded during at least 56 days. The dispersion model was applied to fit chemical shrinkage results and to estimate the maximum (or ultimate) value for calculation of degree of hydration. Except for a pure Portland cement best fits were obtained by the general form of the dispersion model. The development of hydration varied between the investigated cements; based on the measured data the degree of hydration after 24 h hydration at 20 C varied between 40 and 50%. This should be taken into account when comparing properties of concrete made from the different cement types.
Original languageEnglish
Title of host publicationCCC 2008 : Challanges for Civil Engineers
Place of PublicationPorto
PublisherFaculty of Engineering of the University of Porto (FEUP)
Publication date2008
Edition1
Publication statusPublished - 2008
EventChallanges for Civil Engineers - Porto, Portugal
Duration: 1 Jan 2008 → …

Conference

ConferenceChallanges for Civil Engineers
CityPorto, Portugal
Period01/01/2008 → …

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