INVESTIGATING THE LINEAR EXPANSION, SET, AND STRENGTH BEHAVIORS OF THE BINARY MIXTURE PORTLAND CEMENT CLINKER-GYPSUM
محل انتشار: مجله علم مواد و مهندسی ایران، دوره: 8، شماره: 4
سال انتشار: 1390
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 96
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شناسه ملی سند علمی:
JR_IJMSEI-8-4_002
تاریخ نمایه سازی: 26 مرداد 1402
چکیده مقاله:
Abstract: The linear expansion, early-age compressive strength and setting times of the binary mixtures of gypsum and Portland cement clinkers of relatively low C۳A-contents were investigated. For this reason, type ۱, ۲, and ۵ of Portland cement-clinkers were selected and a number of binary mixtures were designed. At relatively lower percentages of gypsum (about ۵%), the early strength behavior is improved. Results obtained for compressive strength of mixtures with ۵% gypsum confirm the possibility of achieving ۲۸- and ۹۰-day compressive strengths up to values higher than ۱۰۰ MPa and ۱۳۰ MPa, respectively. At relatively higher percentages of gypsum (more than ۲۵%), excessive expansion caused by ettringite formation results in the formation of micro-cracks effectively weakening the strength behavior. The work suggests that type S expansive cements could be produced from Portland cement clinkers of relatively low C۳Acontents.
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