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مطالعه آزمایشگاهی تعیین رابطه تجربی مقاومت فشاری برحسب سن بتنهای حاوی سیمان نوع 2 و خرده لاستیک | ||
تحقیقات بتن | ||
دوره 15، شماره 2 - شماره پیاپی 38، تیر 1401، صفحه 21-31 اصل مقاله (688.3 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22124/jcr.2022.20656.1515 | ||
نویسندگان | ||
سید میثم حسن ونهری1؛ مجید قلهکی* 2 | ||
1دانشجوی کارشناسی ارشد سازه، دانشکده مهندسی عمران، دانشگاه سمنان، سمنان، ایران | ||
2هیات علمی | ||
چکیده | ||
رابطهی مقاومت فشاری بتن سن t روزه برحسب 28 روزه در ACI 209 فقط برای سیمانهای نوع 1 و نوع 3 محاسبه شده است. این رابطه برای سیمان نوع 2 در ACI و دیگر تحقیقات موجود نیست. همچنین چنین رابطهای برای بتنهای حاوی خرده لاستیک نیز تا کنون توسط محققین مطرح نشده است. در این مقاله به طور آزمایشگاهی به بررسی رابطهی مقاومت فشاری سن t روزه بتن برحسب سن 28 روزه آن برای بتنهای ساخته شده با سیمان نوع 2 و بتنهای حاوی خرده لاستیک پرداخته شده است. برای این منظور از سه عیار سیمان 350 ،400 و kg/m³ 450 و دو نسبت آب به سیمان 5/0 و 65/0 استفاده شده و خرده لاستیک با نسبتهای 5 تا 20 درصد حجمی جایگزین ماسه گردیده است. در رابطه بدست آمده مقادیر α و β برای بتنهای حاوی سیمان نوع 2 به ترتیب 13/3 و 91/0 و در بتنهای حاوی خرده لاستیک به ترتیب 32/3 و 9/0 بدست آمد. | ||
کلیدواژهها | ||
مقاومت فشاری؛ سن بتن؛ سیمان نوع 2؛ خرده لاستیک؛ نسبت آب به سیمان | ||
مراجع | ||
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