Publications de Zhangli Hu | EPFL Graph Search

Visco-elastic behavior of blended cement pastes at early ages

Karen Scrivener, Pietro Lura, Zhangli Hu, Adrien Jean Régis Maurice Hilaire

This study aims at elucidating the visco-elastic behavior of hardening blended cement pastes, focusing on uni-axial basic compressive creep tests at early loading ages. Cement pastes with Portland cement only or blended with quartz or fly ash (both at a su ...

ELSEVIER SCI LTD2020

Young's modulus and creep of calcium-silicate-hydrate compacts measured by microindentation

Karen Scrivener, Pietro Lura, Zhangli Hu

In this paper, compacts of synthetic calcium silicate hydrate (C-S-H) with 0.8-1.5 calcium-to-silicon ratio (Ca/Si) and 30-80% porosity were prepared by one-direction cold pressing. The Young's modulus and the creep of C-S-H compacts were measured by micro ...

Pergamon-Elsevier Science Ltd2020

Prediction of autogenous shrinkage of cement pastes as poro-visco-elastic deformation

Karen Scrivener, Pietro Lura, Zhangli Hu

Precise and robust predictions of autogenous shrinkage of high performance concrete are essential to limit self-induced stresses and cracking in modern concrete structures. This paper presents predictions of autogenous shrinkage for three cement pastes of ...

Pergamon-Elsevier Science Ltd2019

Intrinsic viscoelasticity of C-S-H assessed from basic creep of cement pastes

Karen Scrivener, Julien Ston, Pietro Lura, Zhangli Hu, Adrien Jean Régis Maurice Hilaire

This paper investigates the fundamental mechanisms behind the effect of supplementary cementitious materials (SCMs) on the basic creep behavior of cement pastes. The intrinsic creep properties of the C-S-H gel are assessed based on measurements of uniaxial ...

Pergamon-Elsevier Science Ltd2019

A novel method to predict internal relative humidity in cementitious materials by H-1 NMR

Karen Scrivener, Pietro Lura, Zhangli Hu

Pergamon-Elsevier Science Ltd2018

Prediction of autogenous shrinkage in fly ash blended cement systems

Zhangli Hu

Autogenous shrinkage is the unrestrained volume change of cementitious materials occurring at con-stant temperature without any change in mass. It occurs as a consequence of self-desiccation (de-crease of internal relative humidity) and increasing capillar ...

EPFL2017

Corrugated tube protocol for autogenous shrinkage measurements: review and statistical assessment

Karen Scrivener, Pietro Lura, Zhangli Hu

Among different methods of measuring early age autogenous deformation of cementitious materials, the corrugated tube method described in the ASTMC1698-09 standard is one of the most commonly used. Despite the standardization and the common application of t ...

Springer2017