عملکرد بتن الیافی سازگار با محیط زیست در روسازی بتنی

امروزه استفاده از مصالح بازیافتی در صنعت در حال افزایش می‌باشد. نمونه‌ای از آن تولید بتن سبز و سازگار با محیط زیست‌ است. تاکنون تحقیقات گوناگونی در دنیا در مورد استفاده از خرده بتن‌های ناشی از تخریب سازه های بتنی به عنوان سنگدانه در بتن انجام شده است. با بررسی انجام شده مشخص گردید علاوه بر بتن، مواد دیگری همچون خرده آجر، خرده سرامیک خرده سنگ‌های ساختمانی و دیگر مواد در نخاله های ساختمانی کشور وجود دارد. تحقیق کنونی به بررسی استفاده از مصالح بازیافتی ناشی از نخاله‌های ساختمانی به عنوان سنگدانه در بتن پرداخته است. جهت تقویت این نوع بتن و بتن معمولی از الیاف فلزی بازیافتی از لاستیک خودروهای فرسوده استفاده شده است. نمونه‌های بتنی با درصدهای مختلف الیاف و سنگدانه‌های بازیافتی ساخته شده و تحت آزمون‌های مقاومت فشاری، مقاومت کششی، مقاومت خمشی وطاقت خمشی قرار گرفتند. نتایج آزمون‌ها نشان داد که استفاده از این نوع بتن الیافی به عنوان بتن سازه‌ای قابل قبول می‌باشد. در بررسی نقش الیاف فلزی بازیافتی و سنگدانه‌های بازیافتی در طراحی ضخامت دال روسازی بتنی از تئوری خطوط تسلیم استفاده شد. نتایج حاکی از آن است که افزودن الیاف فلزی بازیافتی به بتن باعث کاهش تقریبی ضخامت دال به میزان %20 می‌گردد.

performance of environmentally friendly fiber concrete in concrete pavement

Nowadays the use of recycled materials in the industry is increasing. An exle of this is production of environmentally friendly green concrete. So far, various studies regarding the use of concrete debris from demolished concrete as aggregate in concrete have been utilized. The study showed that in addition of crushed concrete, brick and other materials such as, small ceramic rubble and other debris are present. The current study investigates the use of recycled materials resulting from construction debris as aggregate in concrete. Steel fibers recycled from old car tires are used to reinforce concrete and ordinary concrete. Sles with different percentages of recycled fibers and aggregates were made and tests such as compressive strength, tensile strength, flexural bending strength were adopted. Test results showed that the use of this type of fiber concrete as a structural concrete is acceptable. Yield line theory was used to investigate the role of steel recycled fiber and recycled aggregate concrete in slab design thickness. The design method showed that the addition of steel recycled fibers in the concrete reduces the thickness of slabs approximately by 20%. Nowadays the use of recycled materials in the industry is increasing. An exle of this is production of environmentally friendly green concrete. So far, various studies regarding the use of concrete debris from demolished concrete as aggregate in concrete have been utilized. The study showed that in addition of crushed concrete, brick and other materials such as, small ceramic rubble and other debris are present. The current study investigates the use of recycled materials resulting from construction debris as aggregate in concrete. Steel fibers recycled from old car tires are used to reinforce concrete and ordinary concrete. Sles with different percentages of recycled fibers and aggregates were made and tests such as compressive strength, tensile strength, flexural bending strength were adopted. Test results showed that the use of this type of fiber concrete as a structural concrete is acceptable. Yield line theory was used to investigate the role of steel recycled fiber and recycled aggregate concrete in slab design thickness. The design method showed that the addition of steel recycled fibers in the concrete reduces the thickness of slabs approximately by 20%. Nowadays the use of recycled materials in the industry is increasing. An exle of this is production of environmentally friendly green concrete. So far, various studies regarding the use of concrete debris from demolished concrete as aggregate in concrete have been utilized. The study showed that in addition of crushed concrete, brick and other materials such as, small ceramic rubble and other debris are present. The current study investigates the use of recycled materials resulting from construction debris as aggregate in concrete. Steel fibers recycled from old car tires are used to reinforce concrete and ordinary concrete. Sles with different percentages of recycled fibers and aggregates were made and tests such as compressive strength, tensile strength, flexural bending strength were adopted.