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Current Materials Science

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ISSN (Print): 2666-1454
ISSN (Online): 2666-1462

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Research Article

Study on the Influence of Carbonation on the Microstructure of Cement-based Materials Based on BSE Technique

Author(s): Qizhen Shen* and Gaoxiang Lou

Volume 17, Issue 4, 2024

Published on: 06 September, 2023

Page: [412 - 422] Pages: 11

DOI: 10.2174/2666145417666230823094321

Price: $65

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Abstract

Background: The influence of carbonation on the interfacial transition zone (ITZ) microstructure of cement-based materials was significant. However, the width of ITZ is about tens of microns, and studying its micro-characteristics (such as porosity, hydration products, content of unhydrated cement, etc.) by macro test was difficult.

Methods: Backscattered electron (BSE) imaging technology and gray scale analysis method were used to analyze the cement-based materials with water-binder (W/B) ratios of 0.53 and 0.35, respectively.

Results: BSE and gray scale analysis showed that in the ITZ, the porosity of 0.53P (Portland cement paste), 0.35P (Portland cement paste), 0.53F (fly ash), and 0.35F (fly ash) decreased by 24.1%, 28.9%, 49.5%, and 64.2% respectively, whereas the content of hydration products increases after carbonation, and the matrix also shows the same rule. At the same time, the smaller W/B ratio, the greater the porosity reduction, and the filling effect of carbonation on the specimens with supplementary cementitious material (SCM) was more significant than that of pure cement specimens.

Conclusion: The porosity of the ITZ decreased after carbonation, however it remained higher than that of the matrix. Consequently, the ITZ remained a vulnerable zone with a greater diffusion rate of CO2 compared to the matrix even after carbonation.

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[1]
Daneshvar D, Behnood A, Robisson A. Interfacial bond in concrete-to-concrete composites: A review. Constr Build Mater 2022; 359: 129195.
[http://dx.doi.org/10.1016/j.conbuildmat.2022.129195]
[2]
Ollivier JP, Maso JC, Bourdette B. Interfacial transition zone in concrete. Adv Cement Base Mater 1995; 2(1): 30-8.
[http://dx.doi.org/10.1016/1065-7355(95)90037-3]
[3]
Shi X, Zhang C, Wang L, Yao Y. Numerical investigations on the influence of ITZ and its width on the carbonation depth of concrete with stress damage. Cement Concr Compos 2022; 132: 104630.
[http://dx.doi.org/10.1016/j.cemconcomp.2022.104630]
[4]
Scrivener KL, Bentur A, Pratt PL. Quantitative characterization of the transition zone in high strength concretes. Adv Cement Res 1988; 1(4): 230-7.
[http://dx.doi.org/10.1680/adcr.1988.1.4.230]
[5]
Scrivener KL, Nonat A. Hydration of cementitious materials, present and future. Cement Concr Res 2011; 41(7): 651-65.
[http://dx.doi.org/10.1016/j.cemconres.2011.03.026]
[6]
Yan PY, Han FH. Quantitative analysis of hydration degree of composite binder by image analysis and non-evaporable water content. J Chinese Ceram Soc 2015; 43(10): 1331-40.
[7]
Żak AM, Wieczorek A, Chowaniec A, Sadowski Ł. Segmentation of pores within concrete-epoxy interface using synchronous chemical composition mapping and backscattered electron imaging. Measurement 2023; 206: 112334.
[http://dx.doi.org/10.1016/j.measurement.2022.112334]
[8]
Park SM, Yang B, Jeon H. A computational framework for quantifying reactivity of fly ash in cement pastes from backscattered electron images. Constr Build Mater 2019; 200: 630-6.
[http://dx.doi.org/10.1016/j.conbuildmat.2018.12.160]
[9]
Rößler C, Zimmer D, Trimby P, Ludwig H-M. Chemical: Crystallographic characterisation of cement clinkers by EBSD-EDS analysis in the SEM. Cement Concr Res 2022; 154: 106721.
[http://dx.doi.org/10.1016/j.cemconres.2022.106721]
[10]
Yu S, Du H, Sanjayan J. Aggregate-bed 3D concrete printing with cement paste binder. Cement Concr Res 2020; 136: 106169.
[http://dx.doi.org/10.1016/j.cemconres.2020.106169]
[11]
Du H, Pang SD. Long-term influence of nanosilica on the microstructures, strength, and durability of high-volume fly ash mortar. J Mater Civ Eng 2021; 33(8): 04021185.
[http://dx.doi.org/10.1061/(ASCE)MT.1943-5533.0003822]
[12]
Valerie R. Recent developments in electron backscatter diffraction. Adv. Ima.g Elect. Phys 2009; 151: 363-416.
[13]
Nohl JF, Farr NTH, Sun Y, Hughes GM, Cussen SA, Rodenburg C. Low-voltage SEM of air-sensitive powders: From sample preparation to micro/nano analysis with secondary electron hyperspectral imaging. Micron 2022; 156: 103234.
[http://dx.doi.org/10.1016/j.micron.2022.103234] [PMID: 35325668]
[14]
Sheiati S, Behboodi S, Ranjbar N. Segmentation of backscattered electron images of geopolymers using convolutional autoencoder network. Expert Syst Appl 2022; 206: 117846.
[http://dx.doi.org/10.1016/j.eswa.2022.117846]
[15]
Neggers J, Héripré E, Bonnet M, et al. Principal image decomposition for multi-detector backscatter electron topography reconstruction. Ultramicroscopy 2021; 227: 113200.
[http://dx.doi.org/10.1016/j.ultramic.2020.113200] [PMID: 33581922]
[16]
Mehta PK, Stutzman PE. Cement clinker characterization by scanning electron microscopy. Cem Concr Aggr 1991; 13(2): 6.
[17]
Xue QS. Dispersion of metal supported catalysts by combination of backscattered electron imaging and energy dispersive spectroscopy. J Anal Sci 2022; 38(02): 237-42.
[18]
Kang JY. Qualities of electron backscatter diffraction patterns and image contrast from a ferritic-martensitic steel microstructure. Mater Charact 2022; 187: 111826.
[http://dx.doi.org/10.1016/j.matchar.2022.111826]
[19]
Ånes HW, van Helvoort ATJ, Marthinsen K. Correlated subgrain and particle analysis of a recovered Al-Mn alloy by directly combining EBSD and backscatter electron imaging. Mater Charact 2022; 193: 112228.
[http://dx.doi.org/10.1016/j.matchar.2022.112228]
[20]
Scrivener KL. Backscattered electron imaging of cementitious microstructures: Understanding and quantification. Cement Concr Compos 2004; 26(8): 935-45.
[http://dx.doi.org/10.1016/j.cemconcomp.2004.02.029]
[21]
Shen Q, Pan G, Zhan H. Effect of interfacial transition zone on the carbonation of cement-based materials. J Mater Civ Eng 2017; 29(7): 04017020.
[http://dx.doi.org/10.1061/(ASCE)MT.1943-5533.0001860]
[22]
Diamond S, Huang JD. The ITZ in concrete: A different view based on image analysis and SEM observations. Cem Concr Compos 2001; 23(2-3SI): 179-88.
[23]
Li L, Yang J, Shen X. Measuring the hydration product proportion in composite cement paste by using quantitative BSE-EDS image analysis: A comparative study. Measurement 2022; 199: 111290.
[http://dx.doi.org/10.1016/j.measurement.2022.111290]
[24]
Ulsen C, Contessotto R, dos Santos Macedo R, Kahn H. Quantification of the cement paste and phase’s association in fine recycled aggregates by SEM-based image analysis. Constr Build Mater 2022; 320: 126206.
[http://dx.doi.org/10.1016/j.conbuildmat.2021.126206]
[25]
Diamond S. Considerations in image analysis as applied to investigations of the ITZ in concrete. Cement Concr Compos 2001; 23(2-3): 171-8.
[http://dx.doi.org/10.1016/S0958-9465(00)00085-8]

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