بررسی اثرات ترکیب نانوسیلیکا و اکسید گرافن بر مقاومت فشاری، کششی، خمشی و سایشی ملات سیمانی خودمتراکم پرمقاومت
Keywords:
ملات سیمانی, اکسید گرافن, نانوسیلیکاAbstract
اثرات اکسید گرافن (GO) و نانوسیلیکا (NS) بصورت جداگانه به عنوان افزودنی بر مشخصات مکانیکی ملات سیمان و بتن در مقالات متعددی بررسی شد‌ه‌اند. در مقاله حاضر، اثرات ترکیب NS و GO بر مشخصات مکانیکی ملات سیمانی خودمتراکم پرمقاومت (SCHSCM) مورد بررسی قرار گرفته است. چهار ملات سیمانی شامل مقادیر متفاوت کلوئید NS و GO به منظور تعیین مقاومت فشاری، کششی، خمشی و سایشی ملات تقویت شده با این افزودنی¬ها تحت آزمایش قرار گرفته‌اند. در این آزمایشات، 0.0% و 0.01% وزن سیمان GO و 0.0% و 3% وزن سیمان NS برای بررسی مقاومت فیزیکی ملات به کار رفته‌اند. نشان داده شده است که استفاده همزمان از این دو افزودنی شامل 0.01% وزن سیمان GO و 3% وزن سیمان NS، مقاومت فشاری، کششی و خمشی SCHSCM را 26%، 14% و 25% افزایش می¬دهد که به طور مشخص از اثر جداگانه هریک از این نانومواد بر روی ملات سیمانی بیشتر است. مقاومت سایشی ملات سیمانی با افزودن این محلول¬ها اندکی کاهش می یابد.
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