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{Kirchheim:2018:10.3390/ma11040568,
author = {Kirchheim, AP and Rodríguez, ED and Myers, RJ and A, Gobbo L and M, Monteiro PJ and C, C Dal Molin D and de, Souza RB and Cincotto, MA},
doi = {10.3390/ma11040568},
journal = {Materials (Basel, Switzerland)},
title = {Effect of gypsum on the early hydration of cubic and Na-doped orthorhombic tricalcium aluminate.},
url = {http://dx.doi.org/10.3390/ma11040568},
volume = {11},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The tricalcium aluminate (CA) and sulfate content in cement influence the hydration chemistry, setting time and rheology of cement paste, mortar and concrete. Here, in situ experiments are performed to better understand the effect of gypsum on the early hydration of cubic (cub-)CA and Na-doped orthorhombic (orth-)CA. The isothermal calorimetry data show that the solid-phase assemblage produced by the hydration of CA is greatly modified as a function of its crystal structure type and gypsum content, the latter of which induces non-linear changes in the heat release rate. These data are consistent with the in situ X-ray diffraction results, which show that a higher gypsum content accelerates the consumption of orth-CA and the subsequent precipitation of ettringite, which is contrary to the cub-CA system where gypsum retarded the hydration rate. These in situ results provide new insight into the relationship between the chemistry and early-age properties of cub- and orth-CA hydration and corroborate the reported ex situ findings of these systems.
AU  - Kirchheim,AP
AU  - Rodríguez,ED
AU  - Myers,RJ
AU  - A,Gobbo L
AU  - M,Monteiro PJ
AU  - C,C Dal Molin D
AU  - de,Souza RB
AU  - Cincotto,MA
DO  - 10.3390/ma11040568
PY  - 2018///
SN  - 1996-1944
TI  - Effect of gypsum on the early hydration of cubic and Na-doped orthorhombic tricalcium aluminate.
T2  - Materials (Basel, Switzerland)
UR  - http://dx.doi.org/10.3390/ma11040568
UR  - https://www.mdpi.com/1996-1944/11/4/568
UR  - http://hdl.handle.net/10044/1/73807
VL  - 11
ER  -
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