نشریه مهندسی عمران امیرکبیر

نشریه مهندسی عمران امیرکبیر

بهینه‏سازی طرح اختلاط بتن‏های مسلح به الیاف پایه پلیمری براساس روش DBA

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشکده فنی و مهندسی، گروه عمران، دانشگاه قم، قم، ایران.
2 دانشکده مهندسی راه آهن، دانشگاه علم و صنعت، تهران، ایران.
چکیده
هدف از این پژوهش بهینه‏سازی طرح اختلاط بتن‏های مسلح به الیاف با پایه پلیمری براساس روش DBA است. در این مطالعه مقاومت‏های فشاری، کششی و خمشی نمونه‌های 7، 28 و90 روزه ساخته شده با الیاف پایهپلیمری، با بتن معمولی مقایسه شده است. در ضمن رابطه بین مقاومت فشاری و کششی با آیین‌نامه‌های مختلف بررسی شده است. برای ساخت نمونه‌های بتن الیافی از الیاف فورتافرو، بارچیپ و پلی‌پروپیلن به میزان 5/0 و 1 درصد حجمی بتن استفاده شده است. در تهیه نمونه‌های بتنی از دو نوع طرح اختلاط به منظور دستیابی به بتن با مقاومت متوسط و بالا استفاده شده است. همچنین جهت بهینه‏سازی بتن‏های الیافی در سنین مختلف با در نظر گرفتن تاثیر هزینه الیاف، از روش آماری DBA استفاده شده است. نتایج این پژوهش نشان‌‌دهنده افزایش مقاومت فشاری دو نوع بتن الیافی با الیاف‌ فورتافرو و بارچیپ و کاهش مقاومت در نمونه‌های با الیاف پلی‌پروپیلن است. با توجه به نتایج بررسی، افزایش مقاومت بتن موجب افزایش مقاومت فشاری، کششی و خمشی بتن الیافی پایه‌پلیمری می‌شود. همچنین نتایج حاصل از آنالیز DBA نشان می‏دهد، در بتن‏های الیافی با مقاومت متوسط، طرح‏های حاوی 5/0 درصد الیاف پلی‏پروپیلن، 5/0 درصد الیاف فورتا و 5/0 درصد الیاف بارچیپ در سنین 7، 28 و 90 روز به عنوان طرح‏های بهینه معرفی شده‏اند در حالیکه در بتن‏های الیافی با مقاومت بالا در تمامی سنین، طرح‏ حاوی 5/0 درصد الیاف فورتا طرح بهینه است.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Optimization of fiber reinforced polymer concrete mix design based on DBA

نویسندگان English

Mohmmad Hossein Taghavi Parsa 1
Morteza Esmaeili 2
mohammadreza adlparvar 1
1 Ihu-Qom Uni
2 Professor(full) School of Railway Engineering Iran University of Science and Technology Narmak Tehran 16846 Iran
چکیده English

This paper investigates the behavior of fiber-reinforced concrete containing three polymer-based fibers, namely polypropylene, Barchip 48, and Forta-ferro, intending to optimize mix design using the DBA statistical approach. Two concrete mix designs were considered: a medium-strength mix and a high-strength mix. Fiber contents of 0.5% and 1% by concrete volume were used, and the specimens were tested at 7, 28, and 90 days. The study shows that the effect of fiber reinforcement depends strongly on fiber type, concrete strength class, and curing age. According to the results, Forta-ferro and Barchip generally improved compressive strength, while polypropylene reduced strength in some cases. The optimum combinations identified by DBA indicate that medium-strength concrete performs best with 0.5% polypropylene at 7 days, 0.5% Forta-ferro at 28 days, and 0.5% Barchip at 90 days; for high-strength concrete, 0.5% Forta-ferro was the best option at all ages. Overall, the findings confirm that polymer fiber selection plays a decisive role in the mechanical performance of concrete and that DBA can be used effectively for mix optimization.

کلیدواژه‌ها English

Fiber Concrete
Compressive Strength
Tensile Strength
Flexural Strength
Polymer Fibers
[1] ACI Committee 544, State-of-the-art report on fiber reinforced concrete (ACI 544.1R-96), American Concrete Institute, Detroit, 1996, pp. 2-3.
[2] A. Bentur, S. Mindess, Fibre reinforced cementitious composites, CRC Press, 2014.
[3] A.G. Nitschke, R. Winterberg, Performance of macro synthetic fiber reinforced tunnel linings, in: Proceedings of the 2016 World Tunneling Congress, 2016.
[4] F. Hasan-Nattaj, M. Nematzadeh, The effect of Forta-Ferro and steel fibers on mechanical properties of high-strength concrete with and without silica fume and nano-silica, Construction and Building Materials, 137 (2017) 557-572.
[5] K. Kobayashi, R. Cho, Flexural behaviour of polyethylene fibre reinforced concrete, International Journal of Cement Composites and Lightweight Concrete, 3(1) (1981) 19-25.
[6] P. Bhargava, U.K. Sharma, S.K. Kaushik, Compressive stress-strain behavior of small scale steel fibre reinforced high strength concrete cylinders, Journal of Advanced Concrete Technology, 4(1) (2006) 109-121.
[7] Y. Wang, S. Backer, V.C. Li, An experimental study of synthetic fibre reinforced cementitious composites, Journal of Materials Science, 22(12) (1987) 4281-4291.
[8] S.J. Pantazopoulou, M. Zanganeh, Triaxial tests of fiber-reinforced concrete, Journal of Materials in Civil Engineering, 13(5) (2001) 340-348.
[9] S.K. Kaushik, Y. Mohammadi, Investigation on mechanical properties of steel fibre reinforced concrete with mixed aspect ratio of fibres, Journal of Ferrocement, 33(1) (2003) 1-14.
[10] L. Cominoli, C. Failla, G. Plizzari, Steel and synthetic fibres for enhancing concrete toughness and shrinkage behaviour, in: Proceedings of the International Conference on Sustainable Construction Materials and Technologies, Coventry, United Kingdom, 2007, pp. 11-13.
[11] M.J. Hasan, M. Afroz, H.M.I. Mahmud, An experimental investigation on mechanical behavior of macro synthetic fiber reinforced concrete, International Journal of Civil and Environmental Engineering, 11(3) (2011) 18-23.
[12] A.A. Ramezanianpour, P. Rashid Dadash, Polypropylene-steel fiber reinforced concrete, Journal of AUT, 44 (2013) 75-83. (In Persian)
[13] A. Conforti, F. Minelli, A. Tinini, G.A. Plizzari, Influence of polypropylene fibre reinforcement and width-to-effective depth ratio in wide-shallow beams, Engineering Structures, 88 (2015) 12-21.
[14] J.O. Lerch, H.L. Bester, A.S. Van Rooyen, R. Combrinck, W.I. de Villiers, W.P. Boshoff, The effect of mixing on the performance of macro synthetic fibre reinforced concrete, Cement and Concrete Research, 103 (2018) 130-139.
[15] F.T. Al Rikabi, S.M. Sargand, J. Kurdziel, H.H. Hussein, Experimental investigation of thin-wall synthetic fiber-reinforced concrete pipes, ACI Structural Journal, 115(6) (2018) 1671-1681.
[16] G. Pachideh, M. Gholhaki, Using steel and polypropylene fibres to improve the performance of concrete sleepers, Proceedings of the Institution of Civil Engineers - Structures and Buildings, 173(9) (2019) 690-702. https://doi.org/10.1680/jstbu.18.00154
[17] M. Khalily, V. Saberi, H. Saberi, V. Mansouri, A. Sadeghi, G. Pachideh, An experimental study on the effect of high temperatures on performance of the plastic lightweight concrete containing steel, polypropylene and glass fibers, Journal of Structural and Construction Engineering, 8(12) (2022) 284-307. (In Persian) doi: 10.22065/jsce.2021.254752.2277
[18] G. Pachideh, H. Ketabdari, Investigation of the mechanical properties of self-compacting concrete containing recycled steel springs; experimental and numerical investigation, European Journal of Environmental and Civil Engineering, 27(14) (2023) 4026-4045. https://doi.org/10.1080/19648189.2023.2169355
[19] G. Pachideh, M. Gholhaki, A. Moshtagh, Performance of concrete containing recycled springs in post-fire conditions, Proceedings of the Institution of Civil Engineers - Structures and Buildings, 173(1) (2018) 3-16. https://doi.org/10.1680/jstbu.18.00042
[20] S. Ahmad, P. Bhargava, U.K. Sharma, S.K. Kaushik, High-temperature performance of fiber reinforced concrete, Construction and Building Materials, 157 (2017) 256-266.
[21] A.A. El-Abbasy, Tensile, flexural, impact strength, and fracture properties of UHPFRC: A comprehensive review, Construction and Building Materials, 408 (2023) 133621.
[22] M. Safiuddin, S.N. Raman, M.F.M. Zain, Mechanical properties of fiber reinforced concrete: A review, Materials Today: Proceedings, 68 (2022) 2066-2071.
[23] Building and Housing Research Center (BHRC), The national method for concrete mix design, BHRC Publication No. S-479, 2008. (In Persian)
[24] ASTM C39/C39M-12, Standard test method for compressive strength of cylindrical concrete specimens, ASTM International, West Conshohocken, PA, 2012.
[25] INSO 1608-3, Hardened concrete - Part 3: Compressive strength of test specimens - Test method, 1st ed., Iranian National Standardization Organization, 2015. (In Persian)
[26] INSO 1608-2, Hardened concrete - Part 2: Making and curing specimens for strength tests, 1st ed., Iranian National Standardization Organization, 2015. (In Persian)
[27] ASTM C496/C496M-11, Standard test method for splitting tensile strength of cylindrical concrete specimens, ASTM International, West Conshohocken, PA, 2004.
[28] INSO 6047, Concrete - Determination of the splitting tensile strength of cylindrical concrete specimens - Test method, 1st rev., Iranian National Standardization Organization, 2016. (In Persian)
[29] British Standards Institution, BS 1881-118: Testing concrete - Method for determination of flexural strength, BSI, London, 1983.
[30] Permanent Committee for Revising the Iranian Concrete Code, Iranian concrete code (ABA), Vol. 1: Regulations, 3rd ed., Management and Planning Organization of Iran, 2014. (In Persian)
[31] fib (Fédération Internationale du Béton), fib model code for concrete structures 2010, Ernst & Sohn, Berlin, 2013.
[32] R. Kumar, R.K. Garg, Optimal selection of robots by using distance based approach method, Robotics and Computer-Integrated Manufacturing, 26(5) (2010) 500-506.
[33] A. Widiyanto, S. Kato, N. Maruyama, Optimizing selection of appropriate power generation systems in Indonesia by using distance based approach method, Journal of Energy Resources Technology, 126(1) (2004) 63-71.