Mechanical tensile behaviour of cement paste/aggregate bond exposed to leaching - Laboratoire Charles Coulomb (L2C) Access content directly
Journal Articles Construction and Building Materials Year : 2023

Mechanical tensile behaviour of cement paste/aggregate bond exposed to leaching

Abstract

An experimental program is oriented to the mechanical behaviour of the Interfacial Transition Zone (ITZ) exposed to leaching, for a single mix. Leaching kinetics of the degraded depth, measured through grey level on cross sections, reveals a maximum gap of 10 % between ITZ and bulk cement paste. ITZ, with a main thickness of 15 µm suffers a significant decalcification, which is reflected on the mechanical properties of the bond. Grey level, Calcium/Silicon (Ca/Si) molar ratio and Young’s modulus in the degraded zone present similar evolution. Effect of ITZ causing cracking and then debonding is noticed, through chemical analysis, image observation and mechanical tests.
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Dates and versions

hal-04071077 , version 1 (17-04-2023)

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Andrei Gîrboveanu, Mouad Jebli, Frédéric Jamin, Vincent Huon, Laurent Bonnet, et al.. Mechanical tensile behaviour of cement paste/aggregate bond exposed to leaching. Construction and Building Materials, 2023, 369, pp.130592. ⟨10.1016/j.conbuildmat.2023.130592⟩. ⟨hal-04071077⟩
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