UM
The influence of FeSO4 and KH2PO4 on the performance of magnesium oxychloride cement
Li Y.3; Li Z.2; Pei H.2; Yu H.3
2016-01-15
Source PublicationConstruction and Building Materials
ISSN09500618
Volume102Pages:233-238
AbstractAs well known, sulfate and phosphate are widely used additives for MOC products. In this work, the influence of FeSO and KHPO on the properties of magnesium oxychloride cement (MOC) such as compressive strength, water resistance, thermal stability, composition and micro structure were studied in detail by using material testing system (MTS), X-Ray diffraction (XRD), thermogravimetry and differential scanning calorimetry (TG-DSC), scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP), respectively. The results show that both FeSO and KHPO incorporation can benefit the formation of gel-like 5Mg(OH)·MgCl·8HO (P5) and the water resistance of MOC. However, the FeSO and KHPO incorporation can downgrade the thermal stability and the mechanical strength. The influence of KHPO is more obvious than that of FeSO. In addition, the hindering hydration of MgO caused by sulfate and phosphate ions result in reduction of the hydration product, while the double hydrolysis reaction between Fe and MgCO leads to slight increase of the resultant in the slurry of MOC.
KeywordMagnesium oxychloride cement Mechanical strength Micro structure Phosphate Sulfate Thermal stability Water resistance
DOI10.1016/j.conbuildmat.2015.10.186
URLView the original
Language英語
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Cited Times [WOS]:25   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Nanjing University of Aeronautics and Astronautics
2.Hong Kong University of Science and Technology
3.Qinghai Institute of Salt Lakes Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li Y.,Li Z.,Pei H.,et al. The influence of FeSO4 and KH2PO4 on the performance of magnesium oxychloride cement[J]. Construction and Building Materials,2016,102:233-238.
APA Li Y.,Li Z.,Pei H.,&Yu H..(2016).The influence of FeSO4 and KH2PO4 on the performance of magnesium oxychloride cement.Construction and Building Materials,102,233-238.
MLA Li Y.,et al."The influence of FeSO4 and KH2PO4 on the performance of magnesium oxychloride cement".Construction and Building Materials 102(2016):233-238.
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