Improving Water Resistance of Magnesium Binding Substances by the Introduction of Mineral Fillers

Abstract:

Magnesia binders provide strength to the stone, but have one drawback-low resistance and salt resistance. Increasing water and salinity tolerance, mechanical strength of the hardening magnesia binders can be achieved by introducing the system of micro-aggregates. The quality criteria that determine the activity of the micro filler are: high chemical resistance to water, aggressive media, high mechanical strength. Among the effective microfillers composite magnesia binders include diopside, wollastonite. It is shown that the introduction of 60-80 wt%. wollastonite or diopside with a specific surface of 2000-3500 cm²/g provides significant improvement in strength and water resistance that allows you to lengthen the lifespan and maintain the required quality of products based on composite of magnesia binders.

• Periodical: Defect and Diffusion Forum (Volume 410)
• Pages: 790-798
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.410.790
• Online since: August 2021
• Authors: Valentina N. Zyryanova*, Evgeniya V. Lytkina, Arzana P. Ochur-Ool
• Keywords: Frost Resistance, Mineral Microfillers, Strength, Water Resistance

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