Effect of Fly Ash on Rheological Properties of Magnesium Oxychloride Cement

Wu, Jiayu; Chen, Huaxin; Guan, Bowen; Xia, Yu; Sheng, Yanping; Fang, Jianhong

doi:10.1061/(asce)mt.1943-5533.0002597

Cited by 24 publications

(13 citation statements)

References 29 publications

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“…Also, the anticorrosive effect of MOC with single admixture is better than that with compound admixture. However, the effect of admixture (FA) mixed with MOC was tiny aggregate effect mainly 46 . Therefore, the particle size distribution of mineral admixture is the main factor leading to the difference of steel corrosion at the same mineral admixture content.…”

Section: Resultsmentioning

confidence: 99%

“…However, the effect of admixture (FA) mixed with MOC was tiny aggregate effect mainly. 46 Therefore, the particle size distribution of mineral F I G U R E 6 Effect of mineral admixture type on corrosion current density of steel admixture is the main factor leading to the difference of steel corrosion at the same mineral admixture content. Figure 6b describes changes of the corrosion current density of SS in MOC with ages.…”

Section: Effect Of Mineral Admixture Typementioning

confidence: 99%

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Experiment and time‐varying characteristics of steel corrosion in magnesium oxychloride cement

Gong

Wang

Zhang

et al. 2020

Structural Concrete

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The steel corrosion in magnesium oxychloride cement (MOC) restrains the application and popularization of MOC products. However, MOC is a green cementitious material. Therefore, it is necessary to solve the steel corrosion in MOC. Aiming at this issue, firstly, the Stern-Geary constant (B) applied to the steel corrosion in MOC was calculated and verified. Secondly, the influence of different steel and mineral admixtures on the steel corrosion in MOC was studied by electrochemical method. Thirdly, the time-varying models of steel corrosion were given. Fourthly, the life of the steel-MOC system was calculated based on the time-varying model. Finally, the time-varying characteristics of steel corrosion in MOC was proposed. The results show that B of 25 mV is suitable for the corroded steel, whereas B of 40 mV is appropriate for uncorroded steel, in MOC. In addition, the type of steel has a significant effect on steel corrosion in MOC. The anticorrosive effect of metakaolin is less than that of fly ash. The anticorrosive effect of MOC with single admixture is better than that with compound admixture. Besides, the development process of steel corrosion in MOC can be divided into three stages: the descending phase conforming to the exponential time-varying model in the early stage, the ascending phase conforming to the logarithmic time-varying model in the middle stage, and the descending phase conforming to the exponential time-varying model in later stage.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Mineral Admixture Typementioning

confidence: 99%

Experiment and time‐varying characteristics of steel corrosion in magnesium oxychloride cement

Gong

Wang

Zhang

et al. 2020

Structural Concrete

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“…The studies presented in [ 68 ] reveal that “the incorporation of fly ash can enhance the workability or fluidity, retard the setting time, and improve the water resistance of the MOC mortars”. Other subject addresses refer to its rheological properties [ 69 ], the effect of increasing the resistance of the MOC cement composites under the water attack [ 70 ], the influence on the compressive strength [ 46 ], the improvement of the water resistance [ 71 ] or the anticorrosion effect for the reinforcement [ 72 ].…”

Section: Discussionmentioning

confidence: 99%

Perspective of Using Magnesium Oxychloride Cement (MOC) and Wood as a Composite Building Material: A Bibliometric Literature Review

Maier

Manea

2022

Materials

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The building industry is known as one of the biggest consumers of natural resources and an important producer of CO2 emissions. The biggest greenhouse gas emissions are recorded in the production of cement and metallic building materials. The purpose of this paper is to investigate if magnesium oxychloride cement (MOC) can be used as an alternative to the ordinary Portland cement in the mixture of wood–cement composite building materials in order to decrease the negative impact of the construction industry on the environment. The research methodology includes bibliometric literature research, a scientometric analysis and an in-depth discussion. The data used for the research were obtained by interrogating the ISI Web of Science database, selected using the guidelines of the PRISMA method and processed with the help of VOSviewer and Bibliometrix software. The research results indicate an increasing interest in this topic; for example, in the last five years, three times more articles were published on the subject of MOC cement than the number of all articles collected in previous years. Compared to ordinary Portland cement, MOC cement presents a good match with wood, so MOC can be a substitute for ordinary cement to manufacture wood-cement particleboard, especially for the wood species that have high incompatibility with ordinary cement.

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“…Moreover, to improve the functional and technical parameters of produced composites, fly ash was batched as partial substitute of glass granulate. Although the usage of fly ash was due to the promising results on structural and mechanical parameters of fly ash-doped MOC composites published recently [ 42 , 52 , 53 , 54 ], the MOC-fly ash composites were only scantly studied to date. In this way, ternary MOC composites were designed and tested which represents novel and alternative solution for the development of advanced construction materials for construction practice.…”

Section: Introductionmentioning

confidence: 99%

Foam Glass Lightened Sorel’s Cement Composites Doped with Coal Fly Ash

et al. 2021

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Lightweight Sorel’s cement composites doped with coal fly ash were produced and tested. Commercially available foam granulate was used as lightening aggregate. For comparison, reference composites made of magnesium oxychloride cement (MOC) and quartz sand were tested as well. The performed experiments included X-ray diffraction, X-ray fluorescence, scanning electron microscopy, light microscopy, and energy dispersive spectroscopy analyses. The macro- and microstructural parameters, mechanical resistance, stiffness, hygric, and thermal parameters of the 28-days matured composites were also researched. The combined use of foam glass and fly ash enabled to get a material of low weight, high porosity, sufficient strength and stiffness, low water imbibition, and greatly improved thermal insulation performance. The developed lightweight composites can be considered as further step in the design and production of alternative and sustainable materials for construction industry.

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Effect of Fly Ash on Rheological Properties of Magnesium Oxychloride Cement

Cited by 24 publications

References 29 publications

Experiment and time‐varying characteristics of steel corrosion in magnesium oxychloride cement

Experiment and time‐varying characteristics of steel corrosion in magnesium oxychloride cement

Perspective of Using Magnesium Oxychloride Cement (MOC) and Wood as a Composite Building Material: A Bibliometric Literature Review

Foam Glass Lightened Sorel’s Cement Composites Doped with Coal Fly Ash

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