مطالعه آزمایشگاهی خصوصیات بتن حاوی بنتونیت و زئولیت به عنوان پوزولان طبیعی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 مهندسی عمران سازه،دانشکده مهندسی عمران،دانشگاه سمنان،سمنان،ایران

2 دانشیار دانشکده مهندسی عمران، دانشگاه سمنان، سمنان، ایران

3 دانشکده مهندسی عمران، دانشگاه سمنان، سمنان، ایران.

4 دانشکده مهندسی عمران، دانشگاه سمنان ، سمنان، ایران

10.22091/cer.2021.6931.1248

چکیده

استفاده از مواد پوزولانی در ساخت بتن، راه‌حل مناسبی برای کاهش منابع انرژی، تولید گازهای گلخانه‌ای و مصرف سیمان می‌باشد. در این مقاله، تأثیر استفاده از بنتونیت و زئولیت سمنان به جای بخشی از سیمان در بتن بررسی شده است. در این مقاله، 12 طرح مخلوط به همراه طرح مخلوط نمونه کنترل ساخته و مقایسه شده است. متغیر اصلی، تغییر نسبت زئولیت و بنتونیت به وزن سیمان می‌باشد که درصدهای 5، 10، 15 و 20 در نظر گرفته شده است که نمونه‌ها در سه گروه با و بدون بنتونیت و زئولیت ساخته و تأثیر هر کدام از این مواد به تنهایی و در کنار هم، مورد بررسی و مقایسه قرار گرفته است. آزمایش‌های مقاومت فشاری و مقاومت کششی دو نیم شدن برای بررسی خواص و عملکرد بتن، انجام شده است. با توجه به نتایج آزمایش مقاومت فشاری، استفاده از زئولیت و بنتونیت همزمان (ترکیب 5% بنتونیت و زئولیت) باعث افزایش 5% مقاومت فشاری نسبت به نمونه کنترل (بدون بنتونیت و زئولیت) است. همچنین با جایگزین کردن 20% زئولیت، مقاومت فشاری به میزان 9% کاهش یافته است. در اغلب نمونه‌ها با جایگزین کردن زئولیت و بنتونیت به میزان 10%، مقاومت فشاری افزایش یافته است. با توجه به نتایج مقاومت کششی در بتن‌های حاوی زئولیت و بنتونیت اگر مقدار زئولیت و بنتونیت بیش از 10% وزن سیمان شود، مقاومت کششی تا 23% نسبت به نمونه کنترل، کاهش می‌یابد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigation Experimental Of the Concrete Properties Containing Bentonite and Zeolite as Natural Pozzolan

نویسندگان [English]

  • Sara Khosravi 1
  • Omid Rezaifar 2
  • Majid Gholhaki 3
  • Seyedeh Marzieh Qiyami Taklymi 4
1 Faculty of civil engineering. semnan university. semnan. iran
2 Associate Professor, Faculty of Civil Engineering, Semnan University, Semnan, Iran
3 Faculty of Civil Engineering, Semnan University, Semnan, Iran.
4 Faculty of Civil Engineering, Semnan University, Semnan, Iran
چکیده [English]

Using pozzolanic materials in concrete manufacturing is intended as an optimal solution to lower the rate of greenhouse gas emission, and diminish energy resources and cement consumption. This research is aimed at evaluating Semnan zeolite and bentonite as partial replacement of cement in concrete. Twelve bentonite and zeolite mixes and control mix were examined. The main variable is the proportion of bentonite and zeolite (5, 10, 15 and 20%) by weight of cement in replacement mode while the amount of cementitious material, water to cementitious material ratio, fine aggregate content were kept constant. To study properties of hardened concrete, compressive strength and splitting tensile strength tests were performed. According to the results of compressive strength test, using bentonite and zeolite results in 5% increase in compressive strength as compared with the control mix (without bentonite and zeolite). By replacing 20% of zeolite with the weight of cement, the compressive strength is reduced by 9%. In most samples, Bentonite and zeolite as partial replacement of cement, it is possible to obtain the compressive strength acceptable. According to the results in mixtures containing zeolite and bentonite, if the amount of zeolite and bentonite are more than 10% by weight of cement, the tensile strength is reduced by 23% compared to control mix.

کلیدواژه‌ها [English]

  • Pozzolanic Materials
  • Bentonite
  • Zeolite
  • Compressive
  • strength
  • Tensile Strength
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