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

10.30478/jcsm.2019.159896.1104

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.        

]1] کمیته تدوین طرح ملی مخلوط بتن ایران، روش ملی طرح مخلوط بتن، تهران، مرکز تحقیقات راه مسکن و شهرسازی

[2] ACI Committee 318. 2014. Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary(ACI 318R-14).

[3] ACI Committee 544, “Measurement of Properties of Fiber Reinforced Concrete 544.2R-89,” Aci, vol. 544.2R, no. Reapproved, p. 12, 1999.

[4] Â. Alcocel, P. Garce, and S. Chincho, “General study of alkaline hydrolysis in calcium aluminate cement mortars under a broad range of experimental conditions,” Cement and concrete research, vol. 30, no. 11, pp. 1689–1699, 2000.

[5] ASTM C. 490-04,” Standard Practice for Use of Apparatus for the Determination of Length Change of Hardened Cement, Paste, Mortar, and Concrete”. In: American Society for Testing and Materials. 2004.

[6] Anon. n.d. D. Brigante, New Composite Materials: Selection, Design, and Application, Springer International Publishing, Switzerland, 2014.

[7] ASTM, “ASTM C1018-97 Standard Test Method for Flexural Toughness and First-Crack Strength of Fiber-Reinforced Concrete ( Using Beam With Third-Point Loading),” ASTM Stand., 1997.

[8] ASTM International, ASTM C109/C109M-16a. Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50mm] Cube Specimens). 2016.

[9] Barnes, Paul and John Bensted. Structure and Performance of Cements. CRC Press, 2002.

[10] Gu, Ping, J. J. Beaudoin, E. G. Quinn, and R. E. Myers, “Early strength development and hydration of ordinary portland cement/calcium aluminate cement pastes,” Advanced Cement Based Materials, vol. 6, no. 2, pp. 53–58, 1997.

[11] Jiang, K. Fan, F. Wu, and D. Chen, “Experimental study on the mechanical properties and microstructure of chopped basalt fibre reinforced concrete,” Materials and Design, vol. 58, pp. 187–193, 2014.

[12] Hewlett, Peter C. Lea’s Chemistry of Cement and Concrete. Elsevier, 2003.

[13] K. S. Kene, V. S. Vairagade, and S. Sathawane, “Experimental Study on Behavior of Steel and Glass Fiber Reinforced Concrete Composites,” Bonfring International Journal of Industrial Engineering and Management Science, vol. 2, no. 4, pp. 125–130, 2012.

[14] Löber and K. Holschemacher, “Structural Glass Fiber Reinforced Concrete for Slabs on Ground,” World Journal of Engineering and Technology, vol. 02, no. 03, pp. 48–54, 2014.

[15] Mostafa, Nasser Y., Z. I. Zaki, and O. H. Abd, “Cement & Concrete Composites Chemical activation of calcium aluminate cement composites cured at elevated temperature,” Cement and Concrete Composites, vol. 34, no. 10, pp. 1187–1193, 2012.

[16] Muhammed İSKENDER, “Glass Fibre Reinforced Concrete (GFRC),” El-Cezerî Journal of Science and Engineering, vol. 5, pp. 136–162, 2018.

[17] Newman, and B. S. Choo, Advanced concrete technology 3: processes. Butterworth-Heinemann, 2003.

[18] PCI, Committee on Glass fibre Reinforced Concrete Panels, “Recommended Practice for Class Fiber Reinforced Concrete Panels,” PCI Journal, Vol. 32 , 1981.

[19] Scrivener, Karen, “Calcium aluminate,” Advanced Concrete Technology Set, p. 1, 2003.

[20] Shaikh, Faiz Uddin Ahmed, “Review of mechanical properties of short fibre reinforced geopolymer composites,” Construction and Building Materials, vol. 43, pp. 37–49, 2013.

[21] Soboyejo, Mechanical properties of engineered materials, vol. 152, CRC press, 2002.

[22] British Standards,. “BS EN 196-1: Methods of testing cement — determination of strength,” 2005.

[23] Stinnessen, Ingo, Andreas Buhr, Rainer Kockegey-Lorenz, and Raymond Racher, “High purity calcium aluminate cements, production and properties,” in Conference on Mineral Dalian, 2002.

[24] Swamy, Ed., Fibre Reinforced Cement and Concrete Proceedings of the Fourth International Symposium held by RILEM (The International Union of Testing and Research Laboratories for Materials and Structures) and organized by the Department of Mechanical and Process Engi. Taylor & Franics, 1992.

[25] Vairagade, Vikrant S., Kavita S. Kene, and Tejas R. Patil, “Comparative Study of Steel Fiber Reinforced Over Control Concrete,” Scientific and Research Publications, vol. 2, no. 5, pp. 3–5, 2012.