Elucidating the Effect of Accelerated Carbonation on Porosity and Mechanical Properties of Hydrated Portland Cement Paste Using X-Ray Tomography and Advanced Micromechanical Testing

Elucidating the Effect of Accelerated Carbonation on Porosity and Mechanical Properties of Hydrated Portland Cement Paste Using X-Ray Tomography and Advanced Micromechanical Testing

Carbonation of hydrated cement paste (HCP) causes numerous chemo–mechanical changes in the microstructure, e.g., porosity, strength, elastic modulus, and permeability, which have a significant influence on the durability of concrete structures. Due to its complexity, much is still not understood abo...

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Main Authors: Hongzhi Zhang, Claudia Romero Rodriguez, Hua Dong, Yidong Gan, Erik Schlangen, Branko Šavija
Format: Article
Language:English
Published: MDPI AG 2020-04-01
Series:Micromachines
Subjects:
hydrated cement paste
carbonation
micromechanical properties
porosity
Online Access:https://www.mdpi.com/2072-666X/11/5/471
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spelling doaj-2c626a8838b04e9fa6b48198887d85182020-11-25T02:23:04ZengMDPI AGMicromachines2072-666X2020-04-011147147110.3390/mi11050471Elucidating the Effect of Accelerated Carbonation on Porosity and Mechanical Properties of Hydrated Portland Cement Paste Using X-Ray Tomography and Advanced Micromechanical TestingHongzhi Zhang0Claudia Romero Rodriguez1Hua Dong2Yidong Gan3Erik Schlangen4Branko Šavija5Microlab, Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The NetherlandsMicrolab, Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The NetherlandsMicrolab, Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The NetherlandsMicrolab, Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The NetherlandsMicrolab, Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The NetherlandsMicrolab, Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The NetherlandsCarbonation of hydrated cement paste (HCP) causes numerous chemo–mechanical changes in the microstructure, e.g., porosity, strength, elastic modulus, and permeability, which have a significant influence on the durability of concrete structures. Due to its complexity, much is still not understood about the process of carbonation of HCP. The current study aims to reveal the changes in porosity and micromechanical properties caused by carbonation using micro-beam specimens with a cross-section of 500 μm × 500 μm. X-ray computed tomography and micro-beam bending tests were performed on both noncarbonated and carbonated HCP micro-beams for porosity characterization and micromechanical property measurements, respectively. The experimental results show that the carbonation decreases the total porosity and increases micromechanical properties of the HCP micro-beams under the accelerated carbonation. The correlation study revealed that both the flexural strength and elastic modulus increase linearly with decreasing porosity.https://www.mdpi.com/2072-666X/11/5/471hydrated cement pastecarbonationmicromechanical propertiesporosity
collection DOAJ
language English
format Article
sources DOAJ
author Hongzhi Zhang
Claudia Romero Rodriguez
Hua Dong
Yidong Gan
Erik Schlangen
Branko Šavija
spellingShingle Hongzhi Zhang
Claudia Romero Rodriguez
Hua Dong
Yidong Gan
Erik Schlangen
Branko Šavija
Elucidating the Effect of Accelerated Carbonation on Porosity and Mechanical Properties of Hydrated Portland Cement Paste Using X-Ray Tomography and Advanced Micromechanical Testing
Micromachines
hydrated cement paste
carbonation
micromechanical properties
porosity
author_facet Hongzhi Zhang
Claudia Romero Rodriguez
Hua Dong
Yidong Gan
Erik Schlangen
Branko Šavija
author_sort Hongzhi Zhang
title Elucidating the Effect of Accelerated Carbonation on Porosity and Mechanical Properties of Hydrated Portland Cement Paste Using X-Ray Tomography and Advanced Micromechanical Testing
title_short Elucidating the Effect of Accelerated Carbonation on Porosity and Mechanical Properties of Hydrated Portland Cement Paste Using X-Ray Tomography and Advanced Micromechanical Testing
title_full Elucidating the Effect of Accelerated Carbonation on Porosity and Mechanical Properties of Hydrated Portland Cement Paste Using X-Ray Tomography and Advanced Micromechanical Testing
title_fullStr Elucidating the Effect of Accelerated Carbonation on Porosity and Mechanical Properties of Hydrated Portland Cement Paste Using X-Ray Tomography and Advanced Micromechanical Testing
title_full_unstemmed Elucidating the Effect of Accelerated Carbonation on Porosity and Mechanical Properties of Hydrated Portland Cement Paste Using X-Ray Tomography and Advanced Micromechanical Testing
title_sort elucidating the effect of accelerated carbonation on porosity and mechanical properties of hydrated portland cement paste using x-ray tomography and advanced micromechanical testing
publisher MDPI AG
series Micromachines
issn 2072-666X
publishDate 2020-04-01
description Carbonation of hydrated cement paste (HCP) causes numerous chemo–mechanical changes in the microstructure, e.g., porosity, strength, elastic modulus, and permeability, which have a significant influence on the durability of concrete structures. Due to its complexity, much is still not understood about the process of carbonation of HCP. The current study aims to reveal the changes in porosity and micromechanical properties caused by carbonation using micro-beam specimens with a cross-section of 500 μm × 500 μm. X-ray computed tomography and micro-beam bending tests were performed on both noncarbonated and carbonated HCP micro-beams for porosity characterization and micromechanical property measurements, respectively. The experimental results show that the carbonation decreases the total porosity and increases micromechanical properties of the HCP micro-beams under the accelerated carbonation. The correlation study revealed that both the flexural strength and elastic modulus increase linearly with decreasing porosity.
topic hydrated cement paste
carbonation
micromechanical properties
porosity
url https://www.mdpi.com/2072-666X/11/5/471
work_keys_str_mv AT hongzhizhang elucidatingtheeffectofacceleratedcarbonationonporosityandmechanicalpropertiesofhydratedportlandcementpasteusingxraytomographyandadvancedmicromechanicaltesting
AT claudiaromerorodriguez elucidatingtheeffectofacceleratedcarbonationonporosityandmechanicalpropertiesofhydratedportlandcementpasteusingxraytomographyandadvancedmicromechanicaltesting
AT huadong elucidatingtheeffectofacceleratedcarbonationonporosityandmechanicalpropertiesofhydratedportlandcementpasteusingxraytomographyandadvancedmicromechanicaltesting
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