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تأثیر پودر پسماند زغال سنگ بر مشخصات مقاومتی روسازی بتن غلتکی | ||
| مهندسی زیر ساخت های حمل و نقل | ||
| مقاله 1، دوره 1، شماره 3، آبان 1394، صفحه 1-14 اصل مقاله (1.34 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22075/jtie.2015.313 | ||
| نویسندگان | ||
| سعید حسامی1؛ امیر مدرس* 1؛ مصطفی سلطانی نژاد2 | ||
| 1استادیار، دانشکده مهندسی عمران، دانشگاه صنعتی نوشیروانی بابل | ||
| 2دانشجوی کارشناسی ارشد راه و ترابری، دانشگاه صنعتی نوشیروانی بابل | ||
| تاریخ دریافت: 26 آبان 1394، تاریخ پذیرش: 26 آبان 1394 | ||
| چکیده | ||
| نرخ بالای استفاده از زغال سنگ و پایین بودن راندمان کارخانه های زغال شویی در ایران، سبب شده حجم زیادی از زغال سنگ در فرایند تولید به عنوان پسماند، دپو شود. پسماند تخلیه شده در طبیعت آثار مخرب زیست محیطی را در پی دارد؛ درصورتی که بتوان این پسماند را جایگزین بخشی ازسیمان مورد نیاز در تولید بتن کرد، می توان از آثار مخرب آن کاست. در این تحقیق پسماند زغال سنگ (کارخانه ی زغال شویی البرز مرکزی مازندران) پس از پودر کردن و رساندن ابعاد دانه ها به محدوده ی آیین نامه ای، جایگزین 5، 10، 20 و 30 درصد از وزن سیمان در مخلوط بتن غلتکی روسازی شد. مخلوط های بتن غلتکی روسازی حاوی سیمان آمیخته (ترکیب سیمان و پودر پسماند زغال سنگ) مورد بررسی خصوصیات مکانیکی (مقاومت فشاری و کششی) در دوره های عمل آوری 7، 28 و 90 روزه قرار گرفتتد. نتایج حاکی از آن است که جایگزینی 5 درصدی از پودر پسماند، سبب بهبود خواص مقاومتی مخلوط بتنی تا 90 روز شده، ولی جایگزینی10 و 20 درصدی از این پودر، مقاومت فشاری و کششی مخلوط بتن غلتکی روسازی را در سنین مختلف کاهش می دهد؛ همچنین با افزایش درصد جایگزینی پودر پسماند، زمان ویبی مخلوط نیز کاهش می یابد. | ||
| کلیدواژه‌ها | ||
| روسازی بتن غلتکی؛ پودر پسماند زغالسنگ؛ سیمان آمیخته؛ مقاومت فشاری؛ مقاومت کششی | ||
| عنوان مقاله [English] | ||
| Influence of Coal Waste Powder on Strength Properties of Roller Compacted Concrete Pavement | ||
| نویسندگان [English] | ||
| S. Hesami1؛ A. Modarres1؛ M. Soltani Nezhad2 | ||
| چکیده [English] | ||
| The large volumes of coal usage, and the low efficiency of the coal washing plants in Iran; induced a high percentage of refused coal in the production process, deposited as waste. Destructive environmental impacts stem from waste discharges into the natural environment, if it could be possible to replace this residue as a partial replacement of cement in order to produce concrete, damaging effects of this residue would be reduced. In this research, after pulverizing and conveying the grain size of regulation range of Coal Waste (CW) (of Mazandaran Central Alborz Washing Plant); this waste was replaced with 5, 10, 20 and 30 wt.% of cement in Roller Compacted Concrete Pavement (RCCP) mixture. Mechanical properties (compressive and tensile strength) of RCCP mixtures containing blended cement (composition of cement and Coal Waste Powder (CWP)) at the curing periods of 7, 28 and 90 days were investigated. Results show that 5% CWP replacement, will improve the strength properties of concrete mixtures up to 90 days, but declined compressive and tensile strengths was observed for RCCP mixture with CWP replacement content of 10% and 20% at different ages. Also, by increasing the percentage of CWP replacement, Ve-be time of mixture was declined. | ||
| کلیدواژه‌ها [English] | ||
| Roller compacted concrete pavement, Coal Waste Powder, Blended Cement, Compressive Strength, tensile strength | ||
| مراجع | ||
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