Influence of low curing temperatures on the tensile response of low clinker strain hardening UHPFRC under full restraint

Mohamed Abdul Hafiz; Jørgen Skibsted; Emmanuel Denarié

doi:10.1016/j.cemconres.2019.105940

Influence of low curing temperatures on the tensile response of low clinker strain hardening UHPFRC under full restraint

Mohamed Abdul Hafiz^*, Jørgen Skibsted, Emmanuel Denarié

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

13 Citations (Scopus)

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Abstract

The tensile response of strain hardening UHPFRC under full restraint, subjected to curing temperatures of 20 °C, 10 °C, 5 °C, was investigated for two types of mixes with silica fume; Mix I with pure type I cement and Mix II with 50% replacement of cement with limestone filler, both having a similar steel fibrous mix. The development of the elastic modulus, tensile strength, autogenous shrinkage and eigenstresses were put into perspective with the hydration kinetics. Two phases of pozzolanic reaction with different rates of consumption of silica fume were identified. A systematic increase of the autogenous shrinkage and eigenstresses with the curing temperatures was observed. The eigenstresses development was much slower in the case of Mix II, owing to its larger relaxation potential. The eigenstresses in Mix I reached the strain hardening domain after one month, whereas the same in Mix II were only approaching the strain hardening domain after three months.

Original language	English
Article number	105940
Journal	Cement and Concrete Research
Volume	128
Number of pages	21
ISSN	0008-8846
DOIs	https://doi.org/10.1016/j.cemconres.2019.105940
Publication status	Published - 2020

Keywords

Autogenous shrinkage
Eigenstresses under full restraint
Low curing temperature
Solid state Si MAS NMR
UHPFRC

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title = "Influence of low curing temperatures on the tensile response of low clinker strain hardening UHPFRC under full restraint",

abstract = "The tensile response of strain hardening UHPFRC under full restraint, subjected to curing temperatures of 20 °C, 10 °C, 5 °C, was investigated for two types of mixes with silica fume; Mix I with pure type I cement and Mix II with 50% replacement of cement with limestone filler, both having a similar steel fibrous mix. The development of the elastic modulus, tensile strength, autogenous shrinkage and eigenstresses were put into perspective with the hydration kinetics. Two phases of pozzolanic reaction with different rates of consumption of silica fume were identified. A systematic increase of the autogenous shrinkage and eigenstresses with the curing temperatures was observed. The eigenstresses development was much slower in the case of Mix II, owing to its larger relaxation potential. The eigenstresses in Mix I reached the strain hardening domain after one month, whereas the same in Mix II were only approaching the strain hardening domain after three months.",

keywords = "Autogenous shrinkage, Eigenstresses under full restraint, Low curing temperature, Solid state Si MAS NMR, UHPFRC",

author = "Hafiz, {Mohamed Abdul} and J{\o}rgen Skibsted and Emmanuel Denari{\'e}",

year = "2020",

doi = "10.1016/j.cemconres.2019.105940",

language = "English",

volume = "128",

journal = "Cement and Concrete Research",

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Influence of low curing temperatures on the tensile response of low clinker strain hardening UHPFRC under full restraint. / Hafiz, Mohamed Abdul; Skibsted, Jørgen; Denarié, Emmanuel.
In: Cement and Concrete Research, Vol. 128, 105940, 2020.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - Influence of low curing temperatures on the tensile response of low clinker strain hardening UHPFRC under full restraint

AU - Hafiz, Mohamed Abdul

AU - Skibsted, Jørgen

AU - Denarié, Emmanuel

PY - 2020

Y1 - 2020

N2 - The tensile response of strain hardening UHPFRC under full restraint, subjected to curing temperatures of 20 °C, 10 °C, 5 °C, was investigated for two types of mixes with silica fume; Mix I with pure type I cement and Mix II with 50% replacement of cement with limestone filler, both having a similar steel fibrous mix. The development of the elastic modulus, tensile strength, autogenous shrinkage and eigenstresses were put into perspective with the hydration kinetics. Two phases of pozzolanic reaction with different rates of consumption of silica fume were identified. A systematic increase of the autogenous shrinkage and eigenstresses with the curing temperatures was observed. The eigenstresses development was much slower in the case of Mix II, owing to its larger relaxation potential. The eigenstresses in Mix I reached the strain hardening domain after one month, whereas the same in Mix II were only approaching the strain hardening domain after three months.

AB - The tensile response of strain hardening UHPFRC under full restraint, subjected to curing temperatures of 20 °C, 10 °C, 5 °C, was investigated for two types of mixes with silica fume; Mix I with pure type I cement and Mix II with 50% replacement of cement with limestone filler, both having a similar steel fibrous mix. The development of the elastic modulus, tensile strength, autogenous shrinkage and eigenstresses were put into perspective with the hydration kinetics. Two phases of pozzolanic reaction with different rates of consumption of silica fume were identified. A systematic increase of the autogenous shrinkage and eigenstresses with the curing temperatures was observed. The eigenstresses development was much slower in the case of Mix II, owing to its larger relaxation potential. The eigenstresses in Mix I reached the strain hardening domain after one month, whereas the same in Mix II were only approaching the strain hardening domain after three months.

KW - Autogenous shrinkage

KW - Eigenstresses under full restraint

KW - Low curing temperature

KW - Solid state Si MAS NMR

KW - UHPFRC

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U2 - 10.1016/j.cemconres.2019.105940

DO - 10.1016/j.cemconres.2019.105940

M3 - Journal article

AN - SCOPUS:85075716588

SN - 0008-8846

VL - 128

JO - Cement and Concrete Research

JF - Cement and Concrete Research

M1 - 105940

ER -

Influence of low curing temperatures on the tensile response of low clinker strain hardening UHPFRC under full restraint

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Keywords

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