Imperial College London
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ProfessorChrisCheeseman

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Materials Resources Engineering
 
 
 
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Contact

 

c.cheeseman

 
 
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Location

 

242Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Chen:2019:10.1016/j.conbuildmat.2019.04.086,
author = {Chen, X and Zhang, T and Bi, W and Cheeseman, C},
doi = {10.1016/j.conbuildmat.2019.04.086},
journal = {Construction and Building Materials},
pages = {528--536},
title = {Effect of tartaric acid and phosphoric acid on the water resistance of magnesium oxychloride (MOC) cement},
url = {http://dx.doi.org/10.1016/j.conbuildmat.2019.04.086},
volume = {213},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Magnesium oxychloride (MOC) cement is featured with high early strength, low thermal conductivity and low density, but is not widely applied in construction engineering due to its poor water resistance capability. This research has studied the effect of phosphoric acid and tartaric acid additions on the water resistance of MOC cement pastes, in which also reports the effects on setting time, hydration reactions, compressive strength, phase composition, thermal stability and microstructure. 1 wt% of phosphoric acid and tartaric acid additions can improve the water resistance and reduce thermal stability of MOC cement pastes, which is associated with formation of gel-like 5Mg(OH) 2 ·MgCl 2 ·8H 2 O. Moreover, these additions reduce the compressive strength and prolong the setting time of MOC cement pastes, as well as increase the total porosity, the volume fraction of gel pores (<10 nm) and large pores (>100 nm), however, decrease the volume fraction of small capillary pores (10–100 nm) of MOC cement pastes. These effects are caused by both additives but are most pronounced for MOC cement pastes containing phosphoric acid. In addition, 2Mg(OH) 2 ·MgCl 2 ·2H 2 O is a transitional phase in the formative stage of 5Mg(OH) 2 ·MgCl 2 ·8H 2 O in MOC cement.
AU  - Chen,X
AU  - Zhang,T
AU  - Bi,W
AU  - Cheeseman,C
DO  - 10.1016/j.conbuildmat.2019.04.086
EP  - 536
PY  - 2019///
SN  - 0950-0618
SP  - 528
TI  - Effect of tartaric acid and phosphoric acid on the water resistance of magnesium oxychloride (MOC) cement
T2  - Construction and Building Materials
UR  - http://dx.doi.org/10.1016/j.conbuildmat.2019.04.086
UR  - http://hdl.handle.net/10044/1/70168
VL  - 213
ER  -
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