پتانسیل ساخت سیمان LC3 با انواع مختلف کائولن

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه تربیت دبیر شهید رجایی

2 دانشگاه علم و صنعت ایران

10.22124/jcr.2024.26774.1648

چکیده

سیمان و بتن برای زیرساخت دنیای مدرن ضروری هستند.گستردگی، در دسترس بودن و هزینه کم تهیه سیمان باعث می‌شود در همه نقاط روی زمین مورداستفاده قرار بگیرد و حدود 5 تا 8 درصد انتشار گاز دی‌اکسید کربن را به خود اختصاص بدهد. استفاده از مواد سیمانی مکمل (SCMs) برای جایگزینی بخشی از کلینکر در سیمان، موفق‌ترین راهکار برای کاهش انتشار دی‌اکسید کربن در صنعت سیمان جهان است. سیمان رس کلسینه شده‌- سنگ‌آهک (LC3) امکان جایگزینی سیمان با خاک رس کلسینه شده و سنگ‌آهک را فراهم می‌کند. این تحقیق به بررسی خصوصیات و ویژگی‌های سیمان LC3 با در نظرگیری بلورینگی، فازهای همراه، سطح ویژه قبل و بعد از تکلیس و ریزی کائولن و با جایگذاری های 50، 55 و 60% مواد سیمانی مکمل با تعداد 11 نوع خاک کائولن مختلف در مقایسه باسیمان پرتلند می‌پردازد. نتایج نشان داد بتنLC3 با محتوی کائولن 30% و 16% با جایگذاری 50% در سن 28 روز به مقاومت فشاری در حدود 19/1 برابر و مقاومت الکتریکی به ترتیب 6/4 و 6/9 برابر نسبت به سیمان پرتلند می رسد و همچنین در جایگذاری تا 60% ، در سن 28 روز به مقاومت فشاری قابل قبول و مقاومت الکتریکی در حدود 18 برابر سیمان پرتلند و سیمان پرتلند پوزولانی می‌رسد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

The potential of making LC3 cement with different types of kaolin

نویسندگان [English]

  • Fatemeh Arbab 1
  • Amir Tarighat 1
  • Mohsenali Shayanfar 2
1 Shahid Rajaee Teacher Training University
2 Iran University of Science and Technology
چکیده [English]

Cement and concrete are essential for the infrastructure of the modern world. The broad availability and low cost of cement production are the primary reasons for its widespread use in construction, contributing to approximately 5-8% of CO2 emissions. Using supplementary cementitious materials (SCMs) to replace part of the clinker in cement is the most successful solution to reduce carbon dioxide emissions in the worldwide cement industry. Limestone calcined clay cement (LC3) permits the substitution of cement with calcined clay and limestone. This research investigates the properties and characteristics of LC3 cement by considering the crystallinity, associated phases, and specific surface area before and after kaolin calcination, and with 50, 55, and 60% substitution of supplementary cementitious materials compared with 11 different types of kaolin clays compared to Portland cement. The results showed that LC3 concrete with kaolin content of 30% and 16% with 50% substitution at the age of 28 days reaches a compressive strength of about 1.19 times and an electrical resistance of 4.6 and 9.6 times, respectively, compared to Portland cement and also in substitution up to 60%, at the age of 28 days, it reaches acceptable compressive strength and electrical resistance about 18 times that of Portland cement and Portland Pozzolana cement.

کلیدواژه‌ها [English]

  • Calcined clay
  • Limestone
  • Cement
  • LC3
  • Concrete

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