بررسی کارایی و مقاومت فشاری ملات خودمتراکم حاوی میکرو سیلیس و فوق روان کننده

نویسنده

دانشجوی کارشناسی ارشد، دانشکده فنی و مهندسی، دانشگاه تهران، تهران، ایران.

چکیده

در سال‌های اخیر، ملات خودتراکم به دلیل کارایی بالا به صورت گسترده در قسمت‌های مختلف پروژه‌های ساختمانی استفاده می‌شود. کارایی ملات‌های خودتراکم به ترکیب استفاده شده در طرح اختلاط و ویژگی-های اجزای آن مانند نوع سنگدانه‌ها، کیفیت فوق روان‌کننده، مواد افزودنی و … بستگی دارد. همچنین برای ارتقا خصوصیات ملات‌های سیمانی، استفاده از انواع افزودنی مانند خاکستر بادی، نانو ذرات و … رواج یافته است. با توجه به اهمیت بررسی خواص مکانیکی و کارایی ملات‌های سیمانی، در این مطالعه، به بررسی تاثیر میکروسیلیس و فوق روان‌کننده بر کارایی و مقاومت فشاری ملات خودتراکم پرداخته شده است. نتایج تحقیق نشان می دهد که افزودن میکروسیلیس باعث افزایش مقاومت فشاری، و کاهش جریان اسلامپ کوچک در ملات می-شود. همچنین نسبت آب به سیمان یکی از پارامتر های مهم در افزایش مقاومت فشاری کوتاه مدت است که نسبت به دیگر پارامتر ها تاثیر بیشتری دارد و با کاهش نسبت آب به سیمان مقاومت فشاری بیشتری حاصل شد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigating the efficiency and compressive strength of self-compacting mortar containing micro-silica and super-lubricant

نویسنده [English]

  • Omid Bamshad
MSc student, Faculty of Technical and Engineering, University of Tehran, Tehran, Iran.
چکیده [English]

In recent years, self-compacting mortar is widely used in various parts of construction projects due to its high efficiency. The efficiency of self-compacting mortars depends on the composition used in the mixing plan and the characteristics of its components, such as the type of aggregates, super-lubricating quality, additives, etc. Also, to improve the properties of cement mortars, the use of additives such as fly ash, nano particles, etc. has become popular. Considering the importance of examining the mechanical properties and efficiency of cement mortars, in this study, the effect of microsilica and super-lubricant on the efficiency and compressive strength of self-compacting mortars has been investigated. The research results show that the addition of microsilica increases the compressive strength and reduces the small slump flow in the mortar. Also, the ratio of water to cement is one of the important parameters in increasing the short-term compressive strength, which has a greater effect than other parameters, and by reducing the ratio of water to cement, more compressive strength was obtained.

کلیدواژه‌ها [English]

  • Compressive resistance
  • self-compacting mortar
  • micro silica
  • super lubricant

مراجع

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