تاثیر افزودن ترکیب مواد سیمانی زئولیت و میکروسیلیس در مقاومت فشاری و خمشی و قیمت تمام شده بتن سبک سازه‌ای حاوی پلی استایرن منبسط شونده

یاری, علی; شربتدار, محمدکاظم; خیرالدین, علی

doi:10.30478/jcsm.2021.274244.1198

تاثیر افزودن ترکیب مواد سیمانی زئولیت و میکروسیلیس در مقاومت فشاری و خمشی و قیمت تمام شده بتن سبک سازه‌ای حاوی پلی استایرن منبسط شونده

نوع مقاله : مقاله پژوهشی

نویسندگان

¹ دانشگاه سمنان

² استاد، دانشکده مهندسی عمران، دانشگاه سمنان

³ استاد ممتاز، دانشکده مهندسی عمران، دانشگاه سمنان

10.30478/jcsm.2021.274244.1198

چکیده

یکی از معایب مهم ساختمان‌های بتنی وزن بسیار زیاد ساختمان می‌باشد که با میزان تخریب ساختمان در اثر زلزله نسبت مستقیم دارد، لذا به‌کارگیری مصالح نوین سبک با رویکرد مقاومتی از زمینه‌های تحقیقاتی می‌باشد. در این مقاله، تأثیر جایگزینی پلی استایرن به‌جای سنگ‌دانه ها در وزن مخصوص بتن و همچنین افزودن میکروسیلیس و زئولیت و تأثیر آن در مقاومت بتن بررسی می‌گردد. سه طرح اختلاط شامل زئولیت، میکروسیلیس و پلی استایرن به‌صورت نمونه‌های مکعبی و استوانه‌ای جهت آزمایش مقاومت فشاری و نمونه‌های تیرهای منشوری جهت آزمایش مقاومت خمشی و تعیین مدول خمشی ساخته شدند. پس از انجام آزمایش‌ها و تجزیه و تحلیل نتایج در ترکیب 20 درصد زئولیت و 5 درصد میکروسیلیس، بتنی با وزن مخصوص حدود 1756کیلوگرم بر مترمکعب (جمع مولفه‌ها) و مقاومت فشاری 28 روزه با نمونه استوانه ای برابر 27 مگاپاسکال بدست آمد که نوعی بتن سبک سازه‌ای مطابق آئین نامه های معتبر است. ضمنا مقایسه هزینه های ساختمان مسکونی بتن معمولی و بتن سبک طراحی شده براساس خروجی‌ها نشان‌دهنده اثرپذیری سازه‌ای و اقتصادی بتن پیشنهادی و کاهش تا حدود 10 درصدی هزینه های کل مصالح بتنی و میلگردها و اجرای اسکلت بتنی مسلح بود.

کلیدواژه‌ها

موضوعات

افزودنی های بتن و مواد کمکی مرتبط با بتن و سازه های بتنی

عنوان مقاله [English]

Effect of adding Combined Cementitious Zeolite and Silica Fume on Compressive and Flexural Strengths and the Final Cost of Structural Light Weight Concrete Containing Expanded Polystyrene

نویسندگان [English]

Ali Yari ¹
Mohammad Kazem Sharbatdar ²
Ali Kheyroddin ³

¹ Semnan University

² Professor, Faculty of Civil Engineering, Semnan University, Semnan, Iran. (Corresponding Author)

³ Distingushed Professor, Faculty of Civil Engineering, Semnan University, Semnan, Iran

چکیده [English]

The high weight is one of the most important deficient of any building that has a direct role at damages caused during an earthquake, so the application of new lightweight material is one of the attractive research issues. The effectiveness of replacing Polystyrene instead of regular aggregates on its density and also adding silica fume and zeolite and its effectiveness on concrete strength were investigated in this paper. Three mix designs consisting of zeolite, silica fume, and polystyrene on cubic, cylinder compressive specimen, and flexural beam specimens were cast and tested. The test results indicated that the mix design with 20% zeolite and 5% silica fume gave concrete with a special density equal 1756 kilogram per cubic meter and cylinder compressive strength equal 27 MPa, indicating one special structural high-strenght lightweight concrete. In addition, the complete structural design results showed that the total costs of building cast with structural lightweight concrete (concrete, steel bars, and casting cost) was almost 40% less than of regular reinforced concrete building.

کلیدواژه‌ها [English]

Structural Light Weight Concrete
Zeolite
Silica Fume
Polystyrene
Compressive Strength

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