بررسی تأثیر استایرن بوتادین رابر، اتیلن وینیل استات و اکریلیک لاتکس بر خواص مکانیکی بتن سبک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 مدیر مرکز تحقیقات بتن شهید رجایی- موسسه شهید رجایی-هلدینگ راه و شهرسازی

2 کارشناس آزمایشگاه موسسه شید رجایی

چکیده

بتن‌های اصلاح‌شده پلیمری کامپوزیت‌های جدیدی هستند که به دلیل عملکرد نسبی بالا چند قابلیتی و پایداری در مقایسه با بتن سیمان معمولی به‌عنوان یکی از مواد محبوب در صنعت ساخت‌و‌ساز مورداستفاده قرار می‌گیرند در این بتن‌ها با افزودن پلیمر می‌توان برخی از ضعف‌های بتن معمولی را اصلاح کرد. در این پژوهش با افزودن سه لاتکس مختلف شامل استایرن بوتادین رابر، اتیلن وینیل استات و اکریلیک لاتکس خواص مکانیکی و دوامی بتن سبک شده با سنگ‌دانه‌های لیکا اندازه‌گیری شد. در این راستا 15 طرح اختلاط مختلف در دو برنامه آزمایشگاهی انجام شد بدین‌صورت که در مرحله اول تأثیر هریک از لاتکس‌ها با درصد‌های 5، 5/7 و 10 درصد باسیمان موردبررسی قرار گرفت و در مرحله بعد تأثیر هم‌زمان لاتکس با میکروسیلیس بر خواص بتن سبک اندازه‌گیری شد. نتایج نشان داد که افزودن لاتکس تأثیر چشم‌گیری بر مقاومت فشاری و خمشی بتن داشته است. در بین لاتکس‌های استفاده‌شده، اتیلن وینیل استات تأثیر بهتری را نشان داده است.

کلیدواژه‌ها


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