بررسی تأثیر الیاف پلی ‎الفین و جایگزینی سیمان با سرباره بر مقاومت بتن قلیافعال‌شده حاوی خرده لاستیک در محیط‌های عادی و اسیدی

نوع مقاله : مقاله پژوهشی

نویسندگان

بهرام بلوری کشلی ¹

ایمان محمد پور نیک بین ²

محمد جواد مهدی زاده ³

¹ مؤسسه آموزش عالی غیرانتفاعی دیلمان، لاهیجان.

² دانشگاه آزاد اسلامی، واحد رشت، رشت.

³ دانشگاه آیندگان، تنکابن.

10.22067/jfcei.2025.92782.1353

چکیده

بتن قلیافعال‌شده مبتنی بر سرباره، به‌عنوان جایگزینی پایدار برای بتن سیمانی، با کاهش انتشار گازهای گلخانه‌ای و مصرف ضایعات صنعتی مانند سرباره و خرده لاستیک، توسعه‌یافته است. در این پژوهش، تأثیر جایگزینی سیمان با سرباره (۰، ۱۰ و ۲۰ درصد) و افزودن خرده لاستیک (۱۰ درصد حجمی ریزدانه) بر خواص مکانیکی بتن قلیافعال‌شده مسلح به الیاف پلی‌الفین (۰، 5/0 و ۱ درصد حجمی) بررسی شد. نمونه‌ها در دمای ۶۰ درجه سانتی‌گراد عمل‌آوری خشک شدند و تحت آزمایش‌های مقاومت فشاری و کششی در محیط‌های عادی و اسیدسولفوریک قرار گرفتند. نتایج نشان داد که جایگزینی ۲۰ درصد سیمان با سرباره و افزودن ۱ درصد الیاف، بالاترین مقاومت فشاری (6/44 مگا پاسکال) و کششی (87/4 مگا پاسکال) در محیط عادی را ایجاد کرد. در محیط اسیدی، نمونه فاقد سیمان (۱۰۰ درصد سرباره) با ۱ درصد الیاف، کمترین افت مقاومت فشاری (1/32 درصد کاهش از 7/42 به ۲۹ مگا پاسکال) را نشان داد. تحلیل‌های ریزساختاری و سرعت امواج ماوراء صوت، تأییدکننده بهبود خواص مکانیکی و دوام نمونه‌ها بود.

کلیدواژه‌ها

بتن قلیافعال‌شده مبتنی بر سرباره

الیاف پلی‌الفین

جایگزینی سیمان با سرباره

تأثیر اسید بر بتن قلیافعال‌شده

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عنوان مقاله English

Investigation of the Effect of Polyolefin Fibers and Cement Replacement with Slag on the Strength of Alkali-Activated Concrete Containing Rubber Particles in Normal and Acidic Environments

نویسندگان English

Bahram Bolori kashali ¹

Iman Mohammadpour Nikbin ²

, Mohammad Javad Mahdizadeh ³

¹ Civil Eng.–Structural Eng., Deilaman Inst. of Higher Education.

² Dept. of Civil Eng., Islamic Azad Univ., Rasht Branch, Rasht.

³ Civil Eng.–Construction Mgmt., Ayandeghan Univ., Tonekabon, Iran.

چکیده English

Slag-Based Alkali-Activated Concrete, as a Sustainable Alternative to Cementitious Concrete, Has Been Developed by Reducing Greenhouse Gas Emissions and Utilizing Industrial Waste Materials Such as Slag and Rubber Particles. In this study, the effects of replacing cement with slag (0%, 10%, and 20%) and adding rubber particles (10% by volume of fine aggregate) on the mechanical properties of polyolefin fiber-reinforced alkali-activated concrete (0%, 0.5%, and 1% by volume) were investigated. The specimens were cured under dry conditions at 60°C and subjected to compressive and tensile strength tests in both normal and sulfuric acid environments. The results showed that replacing 20% of cement with slag and adding 1% fiber led to the highest compressive (44.6 MPa) and tensile (4.87 MPa) strengths under normal conditions. In the acidic environment, the specimen without cement (100% slag) and reinforced with 1% fiber exhibited the lowest compressive strength loss (a 32.1% decrease from 42.7 MPa to 29 MPa). Microstructural analyses and ultrasonic pulse velocity measurements confirmed the improvement in mechanical properties and durability of the specimens.

کلیدواژه‌ها English

Slag-Based Alkali-Activated Concrete

Polyolefin Fibers

Cement Replacement with Slag

Acid Resistance of Alkali-Activated Concrete

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