Compressive strength of fly ash magnesium oxychloride cement containing granite wastes

2013 ◽  
Vol 38 ◽  
pp. 1-7 ◽  
Author(s):  
Ying Li ◽  
Hongfa Yu ◽  
Lina Zheng ◽  
Jing Wen ◽  
Chengyou Wu ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Oxychloride Cement

scholarly journals Effect of Admixing Fly Ash on Cementing Characteristics of Magnesium Oxychloride Cement

2021 ◽  
Vol 9 (5) ◽  
pp. 248-253
Author(s):  
Rekha Sharma ◽  
R. N. Yadav
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Magnesium Chloride ◽  
Setting Times ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Oxychloride Cement

Investigations pertaining to the effect of admixing different amounts of fly ash on setting characteristics and compressive strength of magnesium oxychloride cement has been carried out in this paper. For this purpose, two different dry mix compositions (1:0 and 1:1) of magnesia and dolomite were prepared and 5 %, 10 %, 15 % and 20 % fly ash were added in dry mixes. The dry mixes were then gauged with 24 °Be concentration of magnesium chloride gauging solution. It was observed that initial and final setting times of cement blocks tend to increase with increasing amount of fly ash in dry mix. MOC cement blocks of 1:1 composition admixed with fly ash displayed good cementing characteristics.

scholarly journals Study on EPS thermal insulation mortar prepared by magnesium oxychloride cement

2020 ◽  
Vol 198 ◽  
pp. 01016
Author(s):  
Shiming Huang ◽  
Wen Zhu ◽  
Yanli Zhang ◽  
Dehui Lu ◽  
Ruying Zhao
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Fly Ash ◽  
Flexural Strength ◽  
Mechanical Strength ◽  
Thermal Insulation ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Oxychloride Cement

In this paper, a composite thermal insulation mortar was prepared with magnesium oxychloride cement and polystyrene (EPS) particles. The influence of EPS particles content on the mechanical strength, density and thermal conductivity of composite thermal insulation mortar was studied. Also, the effect of fly ash on the density and thermal conductivity of the mortar was researched. It was shown that: (1) Generally, EPS particles could reduce the compressive strength, flexural strength, density and thermal conductivity of the mortar. The 28 days compressive strength and 28 days flexural strength decreased by 93.3 % and 81.3 % respectively, with the content of EPS particles from 0 % to 0.486 %. Also the density of the mortar was reduced from 2043 g/dm3 to 805 g/dm3, and the thermal conductivity was fell from 0.4093 W/(m·K) to 0.2191 W/(m·K). (2) Small amounts (less than 5.487 %) of fly ash could increase the density and thermal conductivity. However, when the content of fly ash was more than 5.487 %, the density and thermal conductivity of thermal insulation mortar were significantly reduced.

Influence of Fly Ash on the Properties of Magnesium Oxychloride Cement

2013 ◽  
Vol 662 ◽  
pp. 406-408 ◽  
Author(s):  
Yu Jie Jin ◽  
Li Guang Xiao ◽  
Feng Luo
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Water Repellency ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Softening Coefficient ◽  
Oxychloride Cement

The influence of dosage of fly ash on the properties of magnesium oxychloride cement was studied in this paper. The results indicated that the compressive strength of magnesium oxychloride cement remained unchanged when the dosage of fly ash was 5%. The compressive strength of magnesium oxychloride cement declined when the dosage of fly ash between 10%-30%. Fly ash can enhance the water-repellency of magnesium oxychloride cement and the softening coefficient was about 0.90.

Experimental Study on Desulfurized Gypsum Modified Magnesium Oxychloride Cement

2011 ◽  
Vol 236-238 ◽  
pp. 1554-1558
Author(s):  
Zhi Jie Zhang ◽  
Tao Li ◽  
Ping An Liu
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Abrasion Loss ◽  
Magnesium Oxychloride ◽  
Abrasive Tools ◽  
Magnesium Oxychloride Cement ◽  
Softening Coefficient ◽  
Oxychloride Cement

The influences of desulfurization gypsum on the properties of both Magnesium oxychloride cement (MOC) pastes and MOC abrasive tools were investigated in this study. By incorporating desulfurization gypsum in the MOC pastes, the compressive strength of MOC paste improved slightly. With 5% gypsum addition, the flexural strength of MOC pastes increased by 36%, the abrasion loss of MOC abrasive tools decreased by 35%, the strength softening coefficient greatly increased. The mechanism maybe due to the microstructure of the MOC pastes became more compact with gypsum adding, the rate of hydrolyzation reaction of MOC phases would be postponed.

Influence of Calcium Added Slag on the Strength and Water-Repellency of Magnesium Oxychloride Cement

2013 ◽  
Vol 278-280 ◽  
pp. 437-439
Author(s):  
Yu Jie Jin ◽  
Li Guang Xiao ◽  
Feng Luo
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Water Repellency ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Softening Coefficient ◽  
Oxychloride Cement

The influence of dosage of calcium added slag on the strength and water-repellency of Magnesium oxychloride cement was studied in this paper. The results indicated that the compressive strength of magnesium oxychloride cement enhanced while the flexural strength remained unchanged when the dosage of calcium added slag between 5%-30%. The compressive strength of magnesium oxychloride cement was 110.0 MPa when the dosage of Calcium added slag was 20%, which increased the strength of 17%. The calcium added slag significantly improved the water-repellency of Magnesium oxychloride cement. The softening coefficient of magnesium oxychloride cement was more than 0.82, and the highest is 1.07.

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.

Influence of Fly Ash on Magnesium Oxychloride Cement Deformation

2015 ◽  
Vol 817 ◽  
pp. 252-256 ◽  
Author(s):  
Jin Mei Dong ◽  
Hong Fa Yu ◽  
Mei Juan Wang
Keyword(s):  
Fly Ash ◽  
Inhibition Effect ◽  
Phase Crystal ◽  
Magnesium Oxychloride ◽  
Magnesium Oxychloride Cement ◽  
Oxychloride Cement

The inhibition effect of fly ash on the deformation of magnesium oxychloride cement is not obvious. With the increase of fly ash, the deformation of magnesium oxychloride cement decreased at first, and then increased. The smallest deformation is the proportion of FA-35. The fly ash can promote the formation of the 5·1·8 phase crystal and slow the speed of 5·1·8 phase changing into Mg (OH)2. The growing crystals were disordered, like the scattered tree branches. The causes of FA-35 specimen expansion deformation can be explained by the configuration of the crystal.

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