Stress Evolution in Early-Age Cementitious Materials Considering Autogenous Deformation and Creep

New experimental and modelling techniques

Doctoral thesis (2024)

Authors

M. Liang Materials and Environment - CEG
Research Group
Materials and Environment (CEG) (TU Delft)
Copyright: © 2024 M. Liang
DOI
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https://doi.org/10.4233/uuid:270173e7-6ce6-4a71-ac42-79eab09cce5f
Machine learning Finite element model Early-age cracking Autogenous deformation Creep/ relaxation Temperature-Stress-Testing-Machine
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Published Date

2024

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Materials and Environment

Abstract

Since the introduction of cementitious materials, shrinkage-induced earlyage cracking (EAC) has emerged as a significant issue that negatively influences the function, durability, and aesthetics of concrete structures like dams, tunnels, and underground garages. This thesis aims to develop new experimental and modelling techniques that help resolve this longlasting issue, with a particular emphasis on the EAC induced by AD (AD). Unlike the thermal and drying deformation which are induced by heat and moisture transport, respectively, the AD is an intrinsic behavior caused by the self-desiccation of the hydration of cementitious materials. The ADinduced EAC risk is especially high when it comes to modern (or future) cementitious materials, such as high-performance concrete, ultra-highperformance concrete, and alkali-activated slag concrete.