E-modulus evolution and its relation to solids formation of pastes from commercial cements

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Lino Maia (Author) FEUP; Miguel Azenha (Author) Other; Geiker, M (Author) Other; Joaquim Figueiras (Author) FEUP

Journal

Title: Cement and Concrete Research

Vol. 42

Pages: 928-936

ISSN: 0008-8846

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 13 Citations

Scopus - 16 Citations

Other information

Authenticus ID: P-002-8GH

DOI: 10.1016/j.cemconres.2012.03.013

Abstract (EN): Models for early age E-modulus evolution of cement pastes are available in the literature, but their validation is limited. This paper provides correlated measurements of early age evolution of E-modulus and hydration of pastes from five commercial cements differing in limestone content. A recently developed methodology allowed continuous monitoring of E-modulus from the time of casting. The methodology is a variant of classic resonant frequency methods, which are based on determination of the first resonant frequency of a composite beam containing the material. The hydration kinetics and thus the rate of formation of solids was determined using chemical shrinkage measurements. For the cements studied similar relationships between E-modulus and chemical shrinkage were observed for comparable water-to-binder ratio. For commercial cements it is suggested to model the E-modulus evolution based on the amount of binder reacted, instead of the degree of hydration.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9