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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of the curing time on the stiffness of mortars produced with Portland cement

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Author(s):
G. C. R. Garcia [1] ; E. M. B. Santos [2] ; S. Ribeiro [3]
Total Authors: 3
Affiliation:
[1] Universidade de S. Paulo. Escola de Engenharia de Lorena. Departamento de Engenharia de Materiais
[2] Universidade de S. Paulo. Escola de Engenharia de Lorena. Departamento de Engenharia de Materiais
[3] Universidade de S. Paulo. Escola de Engenharia de Lorena. Departamento de Engenharia de Materiais
Total Affiliations: 3
Document type: Journal article
Source: Cerâmica; v. 57, n. 341, p. 94-99, 2011-03-00.
Abstract

Concrete produced with Portland cement is one of building materials most widely used worldwide. However, due to its highly complex structure, its properties require in-depth studies. Concrete is a mortar consisting of a mixture of cement, sand and coarse aggregates, and its properties are represented basically by the mortar base. The aim of this work was to study the change in stiffness of two mortar compositions cured at 25 ºC with a cement-to-sand ratio of 1:2 and 1:3, as a function of curing time using the variation of Young modulus as the measuring parameter. The results showed that Young modulus increases up to a maximum value on the 8th day, and that this increase is more pronounced during the first three days. An analysis of the results indicates that a large part of the cement hydration process, involving the formation of chemical bonds that are responsible for the mortar stiffness, takes place in the early days of curing. (AU)