The water resistance and mechanism of FeSO4 enhancing bamboo scraps/magnesium oxychloride cement composite

2022 ◽  
Vol 317 ◽  
pp. 125942
Author(s):  
Guoan Sheng ◽  
Long Zheng ◽  
Ping Li ◽  
Baorong Sun ◽  
Xingong Li ◽  
...  
Keyword(s):  
Water Resistance ◽  
Cement Composite ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Oxychloride Cement

scholarly journals Influence of Superhydrophobic Coating on the Water Resistance of Foundry Dust/Magnesium Oxychloride Cement Composite

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3431
Author(s):  
Fajun Wang ◽  
Xiantao Zhu ◽  
Huangjuan Liu ◽  
Sheng Lei ◽  
Daqi Huang
Keyword(s):  
Compressive Strength ◽  
Water Resistance ◽  
Cement Composite ◽  
Superhydrophobic Coating ◽  
X Ray Diffraction ◽  
Aqueous Emulsion ◽  
The Matrix ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Oxychloride Cement

In this work, magnesium oxychloride cement (MOC) was used to realize the resource use of foundry dust (FD). Portland cement (PC)-based superhydrophobic coating was prepared on the surface of FD/MOC composite to improve the water resistance of the composite. First, the FD/MOC composites with different contents of FD were prepared. The phase structure of the composite was analyzed using X-ray diffraction (XRD). The microstructure of the cross-section and surface of the composite was observed using field emission scanning electron microscope (FE-SEM). The mechanical properties of the FD/MOC composites with different FD contents at different ages were tested and analyzed. Secondly, the superhydrophobic coating was prepared on the surface of MOC composite using silane/siloxane aqueous emulsion as the hydrophobic modifier, PC as the matrix and water as the solvent. The microstructure and chemical composition of the PC-based superhydrophobic coating were tested and analyzed. The results show that FD can significantly improve the early strength of the FD/MOC composite. The 28-day compressive strength of the FD/MOC composite decreases with increasing FD content. When the FD content is 30%, the 28-day compressive strength of the FD/MOC composite is as high as 75.68 MPa. Superhydrophobic coating can effectively improve the water resistance of the FD/MOC composite. The softening coefficient of the FD/MOC composite without superhydrophobic coating is less than 0.26, while that of the composite modified by superhydrophobic coating is greater than 0.81.

Development of magnesium oxychloride cement with enhanced water resistance by adding silica fume and hybrid fly ash-silica fume

2021 ◽  
pp. 127682
Author(s):  
Yingying Guo ◽  
Y.X. Zhang ◽  
Khin Soe ◽  
Richard Wuhrer ◽  
Wayne D. Hutchison ◽  
...  
Keyword(s):  
Fly Ash ◽  
Silica Fume ◽  
Water Resistance ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Oxychloride Cement

Effect of hydroxyacetic acid on the water resistance of magnesium oxychloride cement

2020 ◽  
Vol 246 ◽  
pp. 118428 ◽  
Author(s):  
Xueru Luo ◽  
Wenqiang Fan ◽  
Chunqing Li ◽  
Yong Wang ◽  
Hongjian Yang ◽  
...  
Keyword(s):  
Water Resistance ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Hydroxyacetic Acid ◽  
Oxychloride Cement

Magnesium Oxychloride Cement Modified by Aluminum-Leached Coal Fly Ash

2012 ◽  
Vol 174-177 ◽  
pp. 1026-1029 ◽  
Author(s):  
Cheng You Wu ◽  
Hui Fang Zhang ◽  
Hong Fa Yu
Keyword(s):  
Fly Ash ◽  
Compression Strength ◽  
Water Resistance ◽  
Coal Fly Ash ◽  
Filling Material ◽  
High Compression ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Ash Residue ◽  
Oxychloride Cement

Effects of aluminum-leached coal fly ash residue on water-resistance, compression strength and efflorescence of MOC cement have been investigated. The results show that the compression strength of MOC cement curried for 28 days increases with the dosage of ACFAR. The water resistance of MOC cement can be improved obviously. This study has proved that aluminum-leached coal fly ash residue can be used as the filling material of MOC cement with high compression strength and good water-resistance.

Improved Magnesium Cement for Durable Hemp Composite Boards

2022 ◽  
Author(s):  
Jelizaveta Zorica ◽  
Maris Sinka ◽  
Genadijs Sahmenko ◽  
Diana Bajare
Keyword(s):  
Compressive Strength ◽  
Water Resistance ◽  
Chemical Reactivity ◽  
Ease Of Use ◽  
Lower Amount ◽  
Insulation Material ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Cement Board ◽  
Oxychloride Cement

Hemp concrete is a well-known bio-based building material, but due to its relatively low compressive strength is mainly used as an insulation material with a load-bearing wooden frame. There are possibilities to expand hemp concrete application in construction by substituting traditional lime with magnesium cement. Magnesium oxychloride cement is a material already known for some time and nowadays used in building board production. Strength, lightweight, ease of use are advantages that highlight relatively new magnesium oxychloride type boards compared to traditional sheeting materials such as plywood, gypsum plasterboard and fibre-cement board. Therefore, similar parameters are thought to be reached by producing magnesium oxychloride hemp board. In this work, magnesium cement water resistance was studied and possibilities to improve it was examined by adding fly ash and nanosilica. Among the nanomaterials used in building materials, nanosilica has gained significant interest by performing a beneficial effect in improving the mechanical properties of concretes. In addition, due to its ultrafine size and high chemical reactivity, the performance of nanosilica is much better with a lower amount of admixture required. Results show that applied nanosilica slightly reduced the compressive strength of magnesium cement in a dry state, but at the same time significantly increased its water resistance. Hemp magnesium oxychloride cement board prototype samples were produced and demonstrate promising results for further manufacturing of hemp composite boards.

Effect of Metakaolin on the Water Resistance of Magnesium Oxychloride Cement

2022 ◽  
Author(s):  
Wei Gong ◽  
Nan Wang ◽  
Na Zhang
Keyword(s):  
Water Resistance ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Oxychloride Cement

Effects of H3PO4 and Ca(H2PO4)2 on mechanical properties and water resistance of thermally decomposed magnesium oxychloride cement

2013 ◽  
Vol 20 (12) ◽  
pp. 3729-3735 ◽  
Author(s):  
Jing Wen ◽  
Hong-fa Yu ◽  
Ying Li ◽  
Cheng-you Wu ◽  
Jin-mei Dong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Resistance ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Oxychloride Cement
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