Test rig for early age measurements of the autogenous shrinkage of a concrete

Author(s): C. Boulay
Paper category: conference
Book title: Crack Control of Mass Concrete and Related Issues concerning Early-Age of Concrete Structures
Editor(s): F. Toutlemonde and J.-M. Torrenti
Print ISBN: 978-2-35158-125-4
e-ISBN: 978-2-35158-126-1
Publisher: RILEM Publications SARL
Publication year: 2012
Pages: 111 - 122
Total Pages: 12
Language: English

Abstract: A test rig designed for autogenous shrinkage measurements of concrete at early age is presented. It allows the recording of the deformations of a specimen protected against the desiccation at a constant temperature. Only one external displacement sensor is used. The specimens are cast in a flexible mould to avoid any friction. The test rig is immersed in a thermo controlled bath. Measurements can start just after the casting of the concrete. A series of four successive tests on the same concrete underlines the repeatability of the method. This equipment was developed for industrial and research applications. A metrological qualification gave the value of the uncertainty. The autogenous shrinkage of concrete is defined after an age of the concrete called t₀ or setting time. Methods are discussed for the determination of t₀.

Online publication: 2012-07-20
Publication Type: full_text
Public price (Euros): 0.00