مصالح و سازه های بتنی

مصالح و سازه های بتنی

استفاده از خاکستر زباله سوز پسماند شهری به عنوان جایگزین ریزدانه در تولید بتن خود تراکم: ارزیابی فنی و زیست محیطی

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشیار دانشکده فنی و مهندسی، گروه مهندسی عمران، دانشگاه خوارزمی، تهران، ایران
2 دانشجوی کارشناسی ارشد رشته مهندسی عمران، دانشگاه خوارزمی، تهران، ایران
چکیده
هدف این تحقیق بررسی ویژگی‌های بتن خودتراکم حاوی خاکستر زباله‌سوز پسماند شهری به عنوان جایگزین ماسه (درصدهای وزنی 5، 10 و 15 درصد) و خاکستربادی به عنوان جایگزین سیمان (درصدهای وزنی 10، 20 و 30 درصد) است. خواص بتن‌ تازه شامل قابلیت عبور، پرکنندگی، روانی، کارایی و پایداری و خواص بتن سخت شده از جمله مقاومت فشاری، مقاومت خمشی، مقاومت کششی، جذب آب حجمی، جذب آب موئینه، سرعت پالس فرا صوتی و تصاویر میکروسکوپ الکترونی روبشی بررسی شد. نتایج نشان دادکه افزودن خاکستر زباله سوز تا 5 درصد وزنی ماسه و خاکستر بادی تا 30 درصد وزنی سیمان نسبت به نمونه‌ی شاهد باعث ارتقا خواص بتن سخت شده و درصدها بالاتر باعث کاهش این خواص شده است. ارزیابی چرخه‌ی عمر این طرح‌ها بیانگر آن بود که با افزودن خاکستر زباله‌سوز و خاکستربادی در هر مقداری میزان تولید CO2 کاهش می‌یابد. افزودن خاکستر زباله سوز مقدار NOx، PM10 و SO2 تولیدی را کاهش می‌دهد و مقدار تولید سرب و ترکیبات آلی فرار نیز با افزودن خاکستربادی کاهش می‌یابد. همچنین افزودن خاکسترزباله سوز و خاکستر بادی در هر مقداری در فرایند تولید بتن مقدار انرژی مصرفی و مقدار گرمایش جهانی تولیدی را کاهش می‌دهد و اثر مثبت محیط زیستی به دنبال دارد.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Application of Waste Incinerator Ash as Replacement of Fine Aggregate in Self-Compacting Concrete: Technical an Environmental Assessment

نویسندگان English

Mohammad Delnavaz 1
Sara Salehi 2
Seyed Hossein Hosseini Lavasani 1
1 Associate professor, Faculty of Engineering, Civil Engineering Department, Kharazmi University, Tehran, Iran
2 MSc Student in Civil Engineering, Kharazmi University
چکیده English

The aim of this study was to investigate the properties of self-compacting concrete containing municipal waste incineration ash as a substitute for sand (weight percentages of 5, 10 and 15%) and fly ash as a substitute for cement (weight percentages of 10, 20 and 30%). The properties of fresh concrete including permeability, filling, fluidity, workability and stability and the properties of hardened concrete including compressive strength, flexural strength, tensile strength, volumetric water absorption, capillary water absorption, ultrasonic pulse velocity and scanning electron microscope images were investigated. The results showed that adding bottom ash up to 5% by weight of sand and fly ash up to 30% by weight of cement compared to the control sample improved the properties of hardened concrete, and higher percentages reduced these properties.The life cycle assessment of these designs was examined and the results indicated that adding buttom ash and fly ash in any amount reduces the amount of CO2 production. Adding buttom ash reduces the amount of NOx, PM10, and SO2 produced, and the amount of lead and volatile organic compounds produced is also reduced by adding fly ash. Also, adding incinerator ash and fly ash in any amount in the concrete production process reduces the amount of energy consumed and the amount of global warming produced, and has a positive environmental effect.

کلیدواژه‌ها English

Self-Compacting Concrete
Buttom Ash
Fly Ash
Life Cycle assessment
Global Warming Potential
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  • تاریخ دریافت 21 اردیبهشت 1405
  • تاریخ بازنگری 20 خرداد 1405
  • تاریخ پذیرش 01 تیر 1405