Magnesium oxychloride cement concrete

[摘要] The scope of magnesium oxychloride (MOC) cement in concrete works has been evaluated. MOC cement concrete compositions of varying strengths having good placing and finishing characteristics were prepared and investigated for their compressive and flexural strengths, 𝐸-values, abrasion resistance etc. The durability of MOC concrete compositions against extreme environmental conditions viz. heatingâ€�?�cooling, freezingâ€�?�thawing, wettingâ€�?�drying and penetration and deposition of salts etc were investigated. The results reveal that MOC concrete has high compressive strength associated with high flexural strength and the ratio of compressive to flexural strength varies between 6 and 8. The elastic moduli of the compositions studied are found to be 23â€�??85 GPa and the abrasion losses between 0.11 and 0.20%. While alternate heatingâ€�?�cooling cycles have no adverse effect on MOC concrete, it can be made durable against freezingâ€�?�thawing and the excessive exposure to water and salt attack by replacing 10% magnesium chloride solution by magnesium sulphate solution of the same concentration.

[学科分类] 材料工程

[关键词] Oxychloride cement concrete;magnesium sulphate;flexural strength;durability.