Water-to-Cement Ratio of Magnesium Oxychloride Cement Foam Concrete with Caustic Dolomite Powder

Magnesium oxychloride cement (MOC) foam concrete (MOCFC) is an air-hardening cementing material formed by mixing magnesium chloride solution (MgCl2) and light-burned magnesia (i.e., active MgO). In application, adding caustic dolomite powder into light-burned magnesite powder can reduce the MOCFC production cost. The brine content of MOC changes with the incorporation of caustic dolomite powder. This study investigated the relationship between the mass percent concentration and the Baumé degree of a magnesium chloride solution after bischofite (MgCl2·6H2O) from a salt lake was dissolved in water. The proportional relationship between the amount of water in brine and bischofite, and the functional formula for the water-to-cement ratio (W/C) of MOC mixed with caustic dolomite powder were deduced. The functional relationship was verified as feasible for preparing MOC through the experiment.

[1]  Ying Sun,et al.  Recent advances in magnesium/lithium separation and lithium extraction technologies from salt lake brine , 2021 .

[2]  Hu Jiaxin,et al.  Study on Preparation and Properties of Intrinsic Super-Hydrophobic Foamed Magnesium Oxychloride Cement Material , 2020, Applied Sciences.

[3]  Peixu Yang,et al.  Recycling of Spent Pot Lining First Cut from Aluminum Smelters by Utilizing the Two-Step Decomposition Characteristics of Dolomite , 2020, Materials.

[4]  Elias L. Stefanakos,et al.  Energy Storage in Earth-Abundant Dolomite Minerals , 2020, Applied Sciences.

[5]  L. Wang,et al.  COMPARISON OF FLY ASH, PVA FIBER, MGO AND SHRINKAGE-REDUCING ADMIXTURE ON THE FROST RESISTANCE OF FACE SLAB CONCRETE VIA PORE STRUCTURAL AND FRACTAL ANALYSIS , 2020 .

[6]  Shengwen Tang,et al.  EFFECTS OF FINENESS AND CONTENT OF PHOSPHORUS SLAG ON CEMENT HYDRATION, PERMEABILITY, PORE STRUCTURE AND FRACTAL DIMENSION OF CONCRETE , 2020 .

[7]  L. Wang,et al.  PORE STRUCTURAL AND FRACTAL ANALYSIS OF THE INFLUENCE OF FLY ASH AND SILICA FUME ON THE MECHANICAL PROPERTY AND ABRASION RESISTANCE OF CONCRETE , 2020 .

[8]  Xing-wen Jia,et al.  Study of using dolomite ores as raw materials to produce magnesium phosphate cement , 2020 .

[9]  Fajun Wang,et al.  Influence of Superhydrophobic Coating on the Water Resistance of Foundry Dust/Magnesium Oxychloride Cement Composite , 2020, Materials.

[10]  O. Jankovský,et al.  Magnesium Oxychloride Cement Composites with Silica Filler and Coal Fly Ash Admixture , 2020, Materials.

[11]  O. Jankovský,et al.  Synthesis, Structure, and Thermal Stability of Magnesium Oxychloride 5Mg(OH)2∙MgCl2∙8H2O , 2020 .

[12]  Zhongwei Zhao,et al.  Enriching lithium and separating lithium to magnesium from sulfate type salt lake brine , 2020 .

[13]  O. Jankovský,et al.  Thermal Stability and Kinetics of Formation of Magnesium Oxychloride Phase 3Mg(OH)2∙MgCl2∙8H2O , 2020, Materials.

[14]  Daniel C W Tsang,et al.  Accelerated carbonation of reactive MgO and Portland cement blends under flowing CO2 gas , 2020, Cement and Concrete Composites.

[15]  O. Jankovský,et al.  Influence of Waste Plastic Aggregate and Water-Repellent Additive on the Properties of Lightweight Magnesium Oxychloride Cement Composite , 2019, Applied Sciences.

[16]  C. Unluer,et al.  Environmental Assessment of Magnesium Oxychloride Cement Samples: A Case Study in Europe , 2019 .

[17]  Qing Huang,et al.  Characterizing properties of magnesium oxychloride cement concrete pavement , 2019, Journal of Central South University.

[18]  Q. Yuan,et al.  The role of phosphoric acid in improving the strength of magnesium oxychloride cement pastes with large molar ratios of H2O/MgCl2 , 2019, Cement and Concrete Composites.

[19]  Weixin Zheng APPLICATION OF A NEW COMPUTATIONAL METHOD TO CALCULATE THE MIXTURE COMPOSITION OF MAGNESIUM OXYCHLORIDE CEMENT , 2019, Ceramics - Silikaty.

[20]  R. Amal,et al.  A comparison of carbon footprints of magnesium oxide and magnesium hydroxide produced from conventional processes , 2018, Journal of Cleaner Production.

[21]  Shuhai Zheng,et al.  Study of using light-burned dolomite ores as raw material to produce magnesium oxysulfate cement , 2018, Advances in Cement Research.

[22]  O. Jankovský,et al.  Experimental Analysis of MOC Composite with a Waste-Expanded Polypropylene-Based Aggregate , 2018, Materials.

[23]  AltinerMahmut,et al.  Influence of filler on the properties of magnesium oxychloride cement prepared from dolomite , 2017 .

[24]  S. Ruan,et al.  Performance and Microstructure of Calcined Dolomite and Reactive Magnesia-Based Concrete Samples , 2017 .

[25]  Jianzhang Li,et al.  A Low-Cost, Formaldehyde-Free and High Flame Retardancy Wood Adhesive from Inorganic Adhesives: Properties and Performance , 2017, Polymers.

[26]  A. Azimi Experimental investigations on the physical and rheological characteristics of sand–foam mixtures , 2015 .

[27]  Fazhou Wang,et al.  Microstructure and properties of cement foams prepared by magnesium oxychloride cement , 2015, Journal of Wuhan University of Technology-Mater. Sci. Ed..

[28]  F. Cheng,et al.  Potash flotation practice for carnallite resources in the Qinghai Province, PRC , 2014 .

[29]  Zhang He-yi Study on magnesium oxychloride cement material with porous with orthogonal experiment , 2013 .

[30]  Hongfa Yu,et al.  Compressive strength of fly ash magnesium oxychloride cement containing granite wastes , 2013 .

[31]  A. Al-Tabbaa,et al.  Performance of magnesia cements in pressed masonry units with natural aggregates: Production parameters optimisation , 2008 .

[32]  Chungkong Chau,et al.  Influence of molar ratios on properties of magnesium oxychloride cement , 2007 .

[33]  V. Gun'ko,et al.  Magnesia formed on calcination of Mg(OH)2 prepared from natural bischofite , 2006 .