بررسی آزمایشگاهی اثر مصالح خرده آسفالتی و سرباره فولاد بر خصوصیات روسازی بتنی خود متراکم (SCC)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، گروه مهندسی عمران، واحد سوادکوه، دانشگاه آزاد اسلامی، سوادکوه، ایران

2 گروه مهندسی عمران، واحد آیت الله آملی, دانشگاه آزاد اسلامی, آمل , ایران

3 گروه مهندسی عمران، واحد آیت الله آملی، دانشگاه آزاد اسلامی، آمل، ایران

10.22124/jcr.2023.23289.1604

چکیده

وجود مواد زاید حاصل از فرایندهاى مختلف فیزیکى و شیمیایى، یکى از معضلات مهم کشورهاى صنعتى و در حال توسعه می‌باشد. به همین دلیل، تحقیقات وسیعى در مورد روش‌هاى بازیافت یا دفع آنها براى به حداقل رساندن آسیب‌هاى وارده به محیط زیست در حال انجام است. در پژوهش حاضر، اثر استفاده از خرده آسفالت بازیافتی (RAP) به عنوان جایگزین بخشی از سنگدانه طبیعی و سرباره فولاد به عنوان جایگزین بخشی از سیمان، در مخلوط‌های بتنی خود متراکم (SCC) جهت ساخت روسازی راه‌ها مورد بررسی قرار گرفته است. بدین منظور، آزمایش‌های بتن تازه شامل جریان اسلامپ، قیف V، جعبه L، حلقه J و آزمایش‌های بتن سخت شده شامل مقاومت فشاری، کششی و خمشی روی نمونه ها انجام شد. نتایج نشان داد تأثیر استفاده از سرباره به جای سیمان و همچنین خرده آسفالت به جای درشت دانه، باعث کاهش مقاومت‌های فشاری،کششی و خمشی بتن خود متراکم می شود؛ با این وجود، با جایگزینی تا 25 درصد مصالح سنگی با مصالح خرده آسفالتی و 30 درصد سیمان با سرباره، حداقل معیارهای قابل قبول مطابق استاندارهای مربوطه حاصل شد. همچنین برای طرح اختلاط‌های ترکیبی، طرح حاوی 30 درصد خرده آسفالت جایگزین مصالح سنگی توأم با 25 درصد سرباره جایگزین سیمان، نتایج مناسب‌تری نشان داده است. در مجموع، از لحاظ مقاومتی، بهینه‌ترین حالتِ استفاده از این مصالح، به ترتیب، استفاده تکی از 30 درصد سرباره جایگزین سیمان و 25 درصد خرده آسفالت جایگزین مصالح سنگی می‌باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Experimental study of the Effect of Steel Slag and Reclaimed Asphalt Pavement (RAP) on the Properties of Self-compacting Concrete (SCC) Pavement

نویسندگان [English]

  • Mohsen Amouzadeh Omrani 1
  • ghasem tahmouresi 2
  • peyman piri 3
1 Assistant Professor, Department of Civil Engineering, Savadkooh Branch, Islamic Azad University, Savadkooh, Iran
2 Department of Civil Engineering, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran.
3 Department of Civil Engineering, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran.
چکیده [English]

The existence of waste materials from various physical and chemical processes is one of the important problems of industrialized and developing countries. For this reason, extensive research is being done on the methods of recycling or disposing of them in order to minimize the damage to the environment. In the present study, the effect of using recycled asphalt crumb (RAP) as a substitute for natural aggregate and steel slag as a substitute for cement in self-compacting concrete (SCC) mixtures for the construction of road pavements has been investigated. For this purpose, fresh concrete tests including slump flow, V funnel, L box, J ring and hardened concrete tests of compressive, tensile and bending strength were performed on the samples. The results showed the effect of using slag instead of cement and asphalt chips. Instead of coarse grain, it reduces the compressive, tensile and bending resistance of self-dense concrete. Also, by replacing up to 25% of stone materials with small asphalt materials and 30% of slag with cement, minimum acceptable standards were achieved according to the relevant standards. Also, for the design of double mixes, the design containing 30% asphalt crumb instead of stone materials with 25% slag instead of cement has shown more suitable results. The most optimal mode of using these materials is respectively using 30% slag instead of cement and 25% asphalt crumb instead of stone materials.

کلیدواژه‌ها [English]

  • self-compacting concrete pavement
  • reclaimed asphalt pavement
  • steel slag
  • fresh concrete
  • hardened concrete

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