بررسی تاثیر ضایعات خاک کاشی به عنوان جایگزین سیمان بر خصوصیات بتن سازه‌ای

نوع مقاله : مقاله پژوهشی

نویسندگان

1 فارغ التحصیل کارشناسی ارشد عمران، دانشگاه یزد

2 عضو هیئت علمی/دانشگاه یزد

3 عضو هیئت علمی، دانشکده عمران، دانشگاه یزد

10.22124/jcr.2022.20712.1518

چکیده

زباله‌های سرامیکی از عوامل آلودگی محیط زیست هستند که در مقابل عوامل طبیعی و شیمیایی به‌سختی تجزیه می‌گردند. استفاده از خاک ریزدانه کاشی که ترکیب شیمیایی و نرمی مناسب برای جایگزینی سیمان پرتلند دارد، از یک سو باعث کاهش مصرف انرژی و آلودگی حاصله تولید سیمان می‌شود و از سوی دیگر، اثرات زیست‌محیطی ناشی از دپوی زباله‌های سرامیکی را کاهش می‌دهد. هدف این پژوهش بررسی تاثیر افزودن خاک کاشی، به بتن بعنوان جایگزین بخشی از سیمان، روی خواص مکانیکی و دوام بتن می‌باشد. آزمایشات در مرحله اول روی نمونه‌های مکعبی کوچک ملات و پس از کسب نتایج مثبت، روی نمونه‌های بتن انجام گرفت. برای ساخت نمونه‌های بتنی از ۱۲ طرح مخلوط با جایگزینی درصدهای مختلف خاک کاشی با سیمان و نسبت‌های آب به سیمان ۴۵/۰ و ۵/۰ استفاده شد. نتایج نشان داد که برای نسبت آب به سیمان ۵/۰، کاهشی در مقاومت فشاری و خمشی بتن تا ۴۰ درصد جایگزینی خاک کاشی مشاهده نشد و در تمام درصدهای جایگزینی، افت تخلخل، کاهش نفوذ یون کلر، کاهش جمع شدگی و افزایش مقاومت الکتریکی نسبت به نمونه شاهد مشاهده شد. برای نسبت آب به سیمان ۴۵/۰، کاهش اندکی در مقاومت‌های مکانیکی نسبت به نمونه شاهد مشاهده گردید ولی پارامترهای دوام بهبود یافت.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigating the effect of ceramic waste powder as a substitute of cement on the properties of structural concrete

نویسندگان [English]

  • elahe mousavi 1
  • reza morshed 2
  • abolfazl eslami 3
1 MSc graduate, Yazd university
2 Civil Eng. Dept., Yazd University
3 civil Eng. dept., Yazd university, Iran
چکیده [English]

Ceramic wastes are considered as a reason for environmental pollution that are hardly decompose against the natural and chemical factors. Substituting Portland cement with the ceramic waste powder which has a desirable chemical composition and fineness, not only can reduce energy consumption and pollution resulting from cement production, but also mitigate the environmental effects of ceramic waste in the landfills. This study investigates the effect of using ceramic waste as a substitute for cement on the mechanical properties and durability of the structural concrete. To this end, experimental tests were initially performed on small cubic samples of mortar and standard cylinders of concrete. 12 mixed designs were made by replacing different percentages of tile soil with cement possessing water to cement ratios of 0.45 and 0.5. The results confirmed that for water to cement ratio of 0.5, no reduction was observed in the compressive and flexural strength of concrete up to 40% of tile soil replacement. In addition, adding tile waste led to porosity loss, reduction of chlorine ion penetration, shrinkage reduction and improving the electrical resistance ratio. For water to cement ratio of 0.45, a slight decrease in the mechanical strength was observed compared after substituting cement with the ceramic waste compared to the control sample, while the durability parameters were improved.

کلیدواژه‌ها [English]

  • Green concrete
  • Ceramic waste powder
  • Pozzolan
  • Durability
  • Cement substitute

مراجع

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