2دانشکده مهندسی عمران، دانشگاه شهاب دانش، قم، ایران
3دانشگاه تربیت دبیر شهید رجایی
چکیده
در قرن اخیر، استفاده از بتن به صورت روز افزون رشد نموده و چشم انداز آن در آینده نیز، نشان دهنده کاربرد هر چه بیشتر آن در صنعت ساخت و ساز می باشد. رشد جهانی صنعت اتومبیل به عنوان وسیله اصلی حمل و نقل باعث رشد چشمگیر تولید لاستیک (تایر) شده است و به تبع آن شاهد انباشته های بزرگی از لاستیک های مستعمل هستیم که دفع آنها بعنوان یک نوع زباله جامد می تواند منجر به مشکلات زیست محیطی زیادی شود. بنابراین، استفاده بهینه از این ضایعات به یک ضرورت در جهت کاهش آلودگی زیست محیطی تبدیل شده است. در این تحقیق، برای رفع و کاهش معایب و استفاده بهینه از مزایای این عناصر در بتن، تأثیر توأم دوده سیلیسی و پودر لاستیک ریزدانه و درشت دانه ضایعاتی بر خواص مکانیکی و دوام بتن مورد ...
Recently, there has been an increasing trend toward the use of sustainable materials. Sustainability helps the environment by reducing the consumption of non-renewable natural resources. Concrete – the second most consumed material in the world after water – uses a significant amount of non-renewable resources. Efforts aimed at producing environmentally friendly concrete can play a major role in securing sustainable construction. Candidate technologies for sustainable concrete materials include the incorporation of supplementary cementitious materials (SCMs) such as, silica fume as a partial replacement for portland cement; the incorporation of recycled materials in concrete production. As a result, an experimental investigation was conducted to study the mechanical properties and durability of concrete constructed with 10% and 15% recycled tire (fine and coarse) as well as 6% silica fume. This experimental program consisted of ten mix designs.The compressive strength, split tensile strength, electrical resistivity and chloride ion penetration of recycled concrete mixes were compared with the conventional concrete. Results of this study show that the silica fume increased compressive strength, split tensile strength, electrical resistivity and decreased chloride ion penetration of concrete ;however recycled tire decreased compressive strength, split tensile strength, chloride ion penetration and increased electrical resistivity. Results of the mixes including both recycled tire and silica fume show superior durability and mechanical proprties (electrical resistivity, chloride ion penetration, compressive strength and split tensile strength) compared with the conventional concrete.Recently, there has been an increasing trend toward the use of sustainable materials. Sustainability helps the environment by reducing the consumption of non-renewable natural resources. Concrete – the second most consumed material in the world after water – uses a significant amount of non-renewable resources. Efforts aimed at producing environmentally friendly concrete can play a major role in securing sustainable construction. Candidate technologies for sustainable concrete materials include the incorporation of supplementary cementitious materials (SCMs) such as, silica fume as a partial replacement for portland cement; the incorporation of recycled materials in concrete production. As a result, an
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