Monitoring of earth concrete damage evolution during drying

•Effect of drying on the fracture behavior of earth concrete specimens constituted of different percentage of flax fibers.•Monitoring the fracture process of earth concrete specimens conserved at two curing conditions with the digital image correlation technique.•Measurement of autogenous and drying...

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Veröffentlicht in:Construction & building materials 2021-12, Vol.313, p.125340, Article 125340
Hauptverfasser: Kouta, Nathalie, Saliba, Jacqueline, Saiyouri, Nadia
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creator Kouta, Nathalie
Saliba, Jacqueline
Saiyouri, Nadia
description •Effect of drying on the fracture behavior of earth concrete specimens constituted of different percentage of flax fibers.•Monitoring the fracture process of earth concrete specimens conserved at two curing conditions with the digital image correlation technique.•Measurement of autogenous and drying shrinkage of earth concrete and correlation with the mass loss.•Assessment of damage evolution of earth concrete specimens during drying with the acoustic emission and ultrasound pulse velocity technique. Earth concrete, constituted mainly of raw earth, is a promising ecofriendly material for future constructions. However, it is composed of fine particles like clay which make it very sensitive to drying. The volume change induced by desiccation shrinkage can be responsible of cracking which can have a detrimental effect on the durability and mechanical properties. Thus, in order to design reliable earth concrete structures, considering a coupling between drying shrinkage and damage is important. The effect of curing conditions on the mechanical properties of earth concrete with different percentages of flax fibers has been studied. The evolution of damage during drying has been monitored continuously using the ultrasound and the acoustic emission (AE) techniques. The mechanical properties of earth concrete decreases for specimens stored at low relative humidity. In addition, the AE results associated with shrinkage and mass loss measurement made it possible to describe qualitatively the drying process.
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Earth concrete, constituted mainly of raw earth, is a promising ecofriendly material for future constructions. However, it is composed of fine particles like clay which make it very sensitive to drying. The volume change induced by desiccation shrinkage can be responsible of cracking which can have a detrimental effect on the durability and mechanical properties. Thus, in order to design reliable earth concrete structures, considering a coupling between drying shrinkage and damage is important. The effect of curing conditions on the mechanical properties of earth concrete with different percentages of flax fibers has been studied. The evolution of damage during drying has been monitored continuously using the ultrasound and the acoustic emission (AE) techniques. The mechanical properties of earth concrete decreases for specimens stored at low relative humidity. 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subjects Acoustic Emission technique
Damage
Drying
Earth concrete
Engineering Sciences
Other
Shrinkage
title Monitoring of earth concrete damage evolution during drying
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