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Title: Time-resolved 3D characterisation of early-age microstructural development of Portland cement

Journal Article · · Journal of Materials Science

Abstract Time-resolved in-situ synchrotron X-ray microtomography reveals new levels of detail about the chemical and physical processes that take place as Portland cement hardens. The conversion of a fluid paste into a hardened product can be monitored on a sub-minute time-scale, and with sample movement/settlement corrections applied to enable individual particles to be tracked as they react, hydrate, and become interconnected into a single strong monolith. The growth of the strength-giving hydrate phases surrounding cement grains, and of the fluid-filled pore network that surrounds them, is able to be directly viewed at the level of individual cement particles through the application of this tracking protocol. When cement is brought into contact with water, a layer which differs in density from the bulk of the cement grains becomes observable on the grain surfaces during the induction period (during which time the heat evolution from the paste is relatively low). As hydration continues, reaction products grow both from particle surfaces into the initially fluid-filled region, and also into the space originally occupied by the cement particles, forming a density gradient within the microstructure. As the reaction accelerates and larger volumes of solid phases precipitate, the newly-formed solid structure percolates via interconnection of agglomerated low-density outer hydrates, which then densify as hydration continues. This eventually leads to solidification of the structure into a hardened porous matrix. Graphical abstract

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
Engineering and Physical Sciences Research Council (EPSRC); Nuclear Decommissioning Authority (NDA); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1844438
Journal Information:
Journal of Materials Science, Journal Name: Journal of Materials Science Journal Issue: 8 Vol. 57; ISSN 0022-2461
Publisher:
Springer Science + Business MediaCopyright Statement
Country of Publication:
United States
Language:
English

References (53)

First Seconds in a Building’s Life-In Situ Synchrotron X-Ray Diffraction Study of Cement Hydration on the Millisecond Timescale journal April 2012
Influence of silica on the hydration of 3 CaO,SiO2 journal August 1964
In Situ Experiments with X ray Tomography: an Attractive Tool for Experimental Mechanics journal January 2010
Some general considerations of a membrane/osmosis model for portland cement hydration journal March 1980
Effect of alkalies on portland cement hydration II. Alkalies present in form of sulphates journal November 1983
A kinetic model for the hydration of tricalcium silicate journal January 1985
Percolation of phases in a three-dimensional cement paste microstructural model journal March 1991
Backscattered electron imaging of cementitious microstructures: understanding and quantification journal November 2004
Visualization and quantification of pore structure of oil-well cement slurry in liquid-solid transition stage using high-resolution computed tomography journal August 2020
A colloidal interpretation of chemical aging of the C-S-H gel and its effects on the properties of cement paste journal January 2006
X-ray microtomography: Application to microstructure analysis of a cementitious material during leaching process journal February 2006
The calcium silicate hydrates journal February 2008
Quantification of tortuosity in hardened cement pastes using synchrotron-based X-ray computed microtomography journal June 2009
Microstructural development of early age hydration shells around cement grains journal January 2010
Dissolution theory applied to the induction period in alite hydration journal June 2010
Mechanisms of cement hydration journal December 2011
X-ray microtomography shows pore structure and tortuosity in alkali-activated binders journal June 2012
Dissolution rates during the early hydration of tricalcium silicate journal June 2015
A new view on the kinetics of tricalcium silicate hydration journal August 2016
Direct three-dimensional observation of the microstructure and chemistry of C3S hydration journal October 2016
Use of iodine for improving phase quantification using x-ray tomography journal February 2019
Advances in understanding cement hydration mechanisms journal October 2019
Multiscale X-ray tomography of cementitious materials: A review journal February 2020
Automated correction for the movement of suspended particulate in microtomographic data journal September 2020
In situ synchrotron X-ray powder diffraction study of the early age hydration of cements blended with zeolitite and quartzite fines and water-reducing agent journal February 2013
Multi-scale observations of structure and chemical composition changes of portland cement systems during hydration journal July 2019
Permeability prediction and pore structure feature of pervious concrete using brick as aggregate journal July 2019
Comparison of thresholding techniques for quantifying portland cement hydrates using synchrotron microtomography journal January 2021
Representative elementary volume analysis of hardened cement paste during hydration using X-ray Computed Tomography journal March 2021
Imaging and image-based fluid transport modeling at the pore scale in geological materials: A practical introduction to the current state-of-the-art journal April 2016
A brief guide to synchrotron radiation-based microtomography in (structural) geology and rock mechanics journal August 2014
Evaluating the chloride diffusion coefficient of cement mortars based on the tortuosity of pore structurally-designed cement pastes journal April 2021
pytrax: A simple and efficient random walk implementation for calculating the directional tortuosity of images journal July 2019
Calculation of the Compounds in Portland Cement journal October 1929
Understanding silicate hydration from quantitative analyses of hydrating tricalcium silicates journal March 2016
The crucial effect of early-stage gelation on the mechanical properties of cement hydrates journal July 2016
Fiji: an open-source platform for biological-image analysis journal June 2012
Simultaneous phase and amplitude extraction from a single defocused image of a homogeneous object journal April 2002
Beamline I11 at Diamond: A new instrument for high resolution powder diffraction journal July 2009
Recent studies of cements and concretes by synchrotron radiation crystallographic and cognate methods journal September 2015
Metamorphosis revealed: time-lapse three-dimensional imaging inside a living chrysalis journal July 2013
Fast X-ray powder diffraction on I11 at Diamond journal May 2011
TomoPy: a framework for the analysis of synchrotron tomographic data journal August 2014
Developments in synchrotron x-ray computed microtomography at the National Synchrotron Light Source
  • Dowd, Betsy A.; Campbell, Graham H.; Marr, Robert B.
  • SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, SPIE Proceedings https://doi.org/10.1117/12.363725
conference September 1999
X-ray tomography system, automation, and remote access at beamline 2-BM of the Advanced Photon Source conference August 2006
A high-level 3D visualization API for Java and ImageJ journal May 2010
Stripe and ring artifact removal with combined wavelet—Fourier filtering journal January 2009
In Vivo Time-Resolved Microtomography Reveals the Mechanics of the Blowfly Flight Motor journal March 2014
X-Ray Microtomography of an Astm C109 Mortar Exposed to Sulfate Attack journal January 1994
A new model to calculate water permeability of cement-based materials from MIP results journal April 2002
Tortuosity in Porous Media: A Critical Review journal January 2013
Advances in dissolution understanding and their implications for cement hydration journal September 2017
Micro-computed tomography: Introducing new dimensions to taxonomy journal February 2013