Imperial College London
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Dr Rupert J. Myers

Faculty of Engineering, Department of Civil and Environmental Engineering

Senior Lecturer in Sustainable Materials Engineering
 
 
 
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Contact

 

+44 (0)20 7594 8174r.myers Website

 
 
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Location

 

Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Geng:2017:10.1038/srep44032,
author = {Geng, G and Myers, RJ and Li, J and Maboudian, R and Carraro, C and Shapiro, DA and Monteiro, PJM},
doi = {10.1038/srep44032},
journal = {Scientific reports},
pages = {44032--44032},
title = {Aluminum-induced dreierketten chain cross-links increase the mechanical properties of nanocrystalline calcium aluminosilicate hydrate.},
url = {http://dx.doi.org/10.1038/srep44032},
volume = {7},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The incorporation of Al and increased curing temperature promotes the crystallization and cross-linking of calcium (alumino)silicate hydrate (C-(A-)S-H), which is the primary binding phase in most contemporary concrete materials. However, the influence of Al-induced structural changes on the mechanical properties at atomistic scale is not well understood. Herein, synchrotron radiation-based high-pressure X-ray diffraction is used to quantify the influence of dreierketten chain cross-linking on the anisotropic mechanical behavior of C-(A-)S-H. We show that the ab-planar stiffness is independent of dreierketten chain defects, e.g. vacancies in bridging tetrahedra sites and Al for Si substitution. The c-axis of non-cross-linked C-(A-)S-H is more deformable due to the softer interlayer opening but stiffens with decreased spacing and/or increased zeolitic water and Ca2+ of the interlayer. Dreierketten chain cross-links act as 'columns' to resist compression, thus increasing the bulk modulus of C-(A-)S-H. We provide the first experimental evidence on the influence of the Al-induced atomistic configurational change on the mechanical properties of C-(A-)S-H. Our work advances the fundamental knowledge of C-(A-)S-H on the lowest level of its hierarchical structure, and thus can impact the way that innovative C-(A-)S-H-based cementitious materials are developed using a 'bottom-up' approach.
AU  - Geng,G
AU  - Myers,RJ
AU  - Li,J
AU  - Maboudian,R
AU  - Carraro,C
AU  - Shapiro,DA
AU  - Monteiro,PJM
DO  - 10.1038/srep44032
EP  - 44032
PY  - 2017///
SN  - 2045-2322
SP  - 44032
TI  - Aluminum-induced dreierketten chain cross-links increase the mechanical properties of nanocrystalline calcium aluminosilicate hydrate.
T2  - Scientific reports
UR  - http://dx.doi.org/10.1038/srep44032
UR  - https://www.nature.com/articles/srep44032
UR  - http://hdl.handle.net/10044/1/73732
VL  - 7
ER  -
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