بررسی تأثیر الیاف شیشه روی خواص مکانیکی کامپوزیت‌های سیمانی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه تحصیلات تکمیلی و صنعتی و فناوری پیشرفته کرمان/کرمان/ایران

2 عضو هیئت علمی دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته کرمان

چکیده

این تحقیق به خواص مکانیکی مخلوط‌های پایه سیمانی مسلح شده با الیاف شیشه می‌پردازد. خواص مکانیکی موردبررسی شامل مقاومت فشاری، مقاومت نهایی خمشی چهار نقطه‌ای، چقرمگی، مقاومت کششی نهایی، ضربه و جمع شدگی می­باشد. در مخلوط‌های موردمطالعه سیمان پرتلند و آلومینات کلسیم به‌عنوان عامل چسباننده در ساختار استفاده‌شده‌اند. نمونه‌های حاوی ۲ و ۴ درصد (درصدی از حجم کل مخلوط) الیاف شیشه که نسبت طول به قطر آن برابر 1925 می‌باشد، استفاده‌شده است. بر اساس آزمون‌های صورت گرفته، نتایج حاکی از آن است که مخلوط‌های ساخته‌شده باسیمان آلومینات کلسیم مقاومت فشاری بیشتری نسبت به مخلوط‌های ساخته‌شده باسیمان پرتلند دارند. همچنین با افزودن الیاف شیشه به مخلوط‌ها مقاومت خمشی تا حدود 32% در 28 روز نسبت به نمونه کنترل افزایش یافته است. اضافه کردن الیاف شیشه نیز در هر دو نوع سیمان سبب بهبود مقاومت کششی، چقرمگی و ضربه می‌شود و باعث کاهش جمع شدگی نیز می­گردد که جمع شدگی سیمان‌های آلومینات کلسیم ( CAC) قدری کمتر از سیمان پرتلند می‌باشد.
 

کلیدواژه‌ها


عنوان مقاله [English]

Investigating the effect of glass fiber on the mechanical properties of cement composites

نویسندگان [English]

  • sarvenaz moetamed 1
  • Hesam Madani 2
1 Graduate University of Advanced Technology,kerman,iran
2 Assistant Professor, Dept. of Civil Engineering, Kerman Graduate University of Technology
چکیده [English]

In this research, a comparison has been made between the mechanical properties of cement based mixtures containing glass fiber. For this purpose, a type II portland cement and a calcium aluminate cement have been used. In order to investigate the mechanical characteristics, the tests including compressive strength, flexural strength, toughness, ultimate tensile strength, impact resistance and drying shrinkage of the mixtures were evaluated at ages from 28 days to 270 days. Glass fiber was incorporated in the mixes at replacement levels of 2 and 4 percent (percent of the total volume of the mixture). Based on the tests, the results indicate that the mixtures made with calcium aluminate had improved properties compared to the mixtures made with Portland cement. Furthermore, by adding glass fiber to the mixes, the flexural strength was increased by about 32% in 28 days compared to the plain mixture. Adding glass fibers in both types of cement also improved tensile strength, flexural toughness and impact resistance, as well as drying shrinkage.

کلیدواژه‌ها [English]

  • Portland cement
  • Calcium aluminate cement
  • Glass fiber

9.        

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