بررسی اثر قطر و درصد حجمی الیاف فلزی قلاب‌دار بر زمان وی‌بی و خصوصیات مکانیکی بتن غلتکی روسازی | ||
| پژوهش های زیرساخت های عمرانی | ||
| دوره 8، شماره 1 - شماره پیاپی 14، شهریور 1401، صفحه 131-144 اصل مقاله (1.9 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22091/cer.2022.7777.1353 | ||
| نویسندگان | ||
| پیمان پاریاد1؛ حسین نادرپور* 2؛ محمد کاظم شربتدار3 | ||
| 1گروه عمران، واحد ساری، دانشگاه آزاد اسلامی، ساری، ایران. | ||
| 2دانشکده مهندسی عمران، دانشگاه سمنان، سمنان، ایران | ||
| 3مهندسی عمران، دانشگاه سمنان، سمنان، ایران. | ||
| چکیده | ||
| استفاده از بتن غلتکی روسازی در سراسر دنیا رو به افزایش است و همین موضوع اهمیت بررسی آزمایشگاهی دقیق این نوع از بتن را نشان می‌دهد. پژوهش‌های محدودی به بررسی اثر قطر الیاف فلزی و درصد مناسب حجمی آن در بتن غلتکی روسازی پرداختند. بنابراین در این تحقیق به بررسی اثر قطر و درصد حجمی الیاف فلزی قلاب‌دار بر RCCP پرداخته می‌شود. به منظور ارزیابی اثر قطر و درصد حجمی الیاف فلزی قلاب‌دار بر زمان وی‌بی، مقاومت فشاری، مقاومت کششی دو نیم شدگی، مقاومت خمشی و طاقت بتن غلتکی روسازی، از 10 طرح مخلوط استفاده شد. یک مخلوط کنترل بدون الیاف و نه مخلوط حاوی درصد حجمی 0.25 تا 0.75 با قطر 0.38 تا 0.7 میلی‌متر ساخته شد. نتایج نشان داد که افزایش درصد حجمی و کاهش قطر الیاف منجر به افزایش زمان وی‌بی .و بهبود مشخصات مکانیکی می‌گردد. با توجه به آزمایش‌های انجام شده در این تحقیق، مولفه درصد حجمی الیاف اثر گذاری بیشتری نسبت به قطر الیاف نشان داده است. با افزودن الیاف فلزی قلاب‌دار، نمودار نیرو-تغییر مکان خمشی و در نتیجه طاقت نیز بهبود چشمگیری نشان دادند. طرح مخلوط حاوی درصد حجمی 0.75 و قطر 0.38 میلی‌متر بهترین نتایج آزمایش‌های مقاومت مکانیکی و طاقت را ثبت کرد و نتایج مقاومت کششی دو نیم شدگی و خمشی آن تا 100 درصد افزایش نشان داد. | ||
| کلیدواژه‌ها | ||
| بتن غلتکی روسازی؛ الیاف فلزی؛ مشخصات مکانیکی؛ زمان وی‌بی؛ طاقت | ||
| عنوان مقاله [English] | ||
| Assessing the Effects of Volume Fraction and Diameter of Hooked-End Steel Fiber on Vebe Time and Mechanical Properties of RCCP | ||
| نویسندگان [English] | ||
| Peyman Paryad1؛ Hosein Naderpour2؛ M. Kazem Sharbatdar3 | ||
| 1Department of Civil Engineering, Sari Branch, Islamic Azad University, Sari, Iran. | ||
| 2Faculty of Civil Engineering, Semnan University, Semnan, Iran | ||
| 3Faculty of Civil Engineering, Semnan University, Iran. | ||
| چکیده [English] | ||
| Using Roller Compacted Concrete Pavement (RCCP) is expanding all around the world and it shows the importance of accurate experimental assessment of this kind of concrete. In this research, in order to investigate the influence of volume fraction and diameter of hooked-end steel fiber on Vebe time, compressive strength, splitting tensile strength, flexural strength, and toughness of RCCP, ten mixtures were used. One control mixture and nine fibrous mixtures contain volume fraction of 0.25-0.75 and diameter of 0.38-0.7 mm fiber were constructed. Results showed that increment of fiber volume fraction and decrease of fiber diameter led to increase of mechanical properties and Vebe time of RCCP. Due to experiments, the factor of volume fraction was more determinative than diameter. By adding hooked-end steel fiber, load-deflection curve and toughness demonstrate sensible improvement. Some of mixtures showed softening behavior and other showed hardening behavior. Mixtures which contain higher fiber volume fraction and lesser fiber diameter showed hardening behavior. Mixture with volume fraction of 0.75 and diameter of 0.38 mm recorded the most appropriate mechanical strength and toughness, and the results of splitting tensile and flexural strength indicated increment more than about 100%. | ||
| کلیدواژه‌ها [English] | ||
| Roller compacted concrete pavement, Steel fiber, Mechanical properties, Vebe time, Toughness | ||
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| مراجع | ||
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[1] PCA, Guide for Roller-Compacted Concrete Pavements. 2010: Portland Cement Association. [2] Wang, C., et al., Experimental investigations of dynamic compressive properties of roller compacted concrete (RCC). Construction and Building Materials, 2018. 168: p. 671-682. [3] Chhorn, C., S.J. Hong, and S.-W. Lee, A study on performance of roller-compacted concrete for pavement. Construction and Building Materials, 2017. 153: p. 535-543. [4] Ulrich, A., First placing of roller compacted concrete (RCC) with high-power compaction screeds in the Federal Republic of Germany. Construction and Building Materials, 1987. 1(3): p. 123-129. [5] ACI, 325.10R-95. Report on Roller-Compacted Concrete Pavements. 1995, American Concrete Institute. [6] Hashemi, M., et al., The effect of coarse to fine aggregate ratio on the fresh and hardened properties of roller-compacted concrete pavement. Construction and Building Materials, 2018. 169: p. 553-566. [7] Rahmani, E., M.K. Sharbatdar, and M.H.A. Beygi, A comprehensive investigation into the effect of water to cement ratios and cement contents on the physical and mechanical properties of Roller Compacted Concrete Pavement (RCCP). Construction and Building Materials, 2020. 253: p. 119177-119177. [8] Rahmani, E., M.K. Sharbatdar, and M.H.A. Beygi, Influence of cement contents on the fracture parameters of Roller compacted concrete pavement (RCCP). Construction and Building Materials, 2021. 289: p. 123159-123159. [9] Vahedifard, F., M. Nili, and C.L. Meehan, Assessing the effects of supplementary cementitious materials on the performance of low-cement roller compacted concrete pavement. Construction and Building Materials, 2010. 24(12): p. 2528-2535. [10] Rao, S.K., P. Sravana, and T.C. Rao, Abrasion resistance and mechanical properties of Roller Compacted Concrete with GGBS. Construction and Building Materials, 2016. 114: p. 925-933. [11] Omran, A., et al., Production of roller-compacted concrete using glass powder: Field study. Construction and Building Materials, 2017. 133: p. 450-458. [12] LaHucik, J., et al., Mechanical properties of roller-compacted concrete with macro-fibers. Construction and Building Materials, 2017. 135: p. 440-446. [13] Roesler, J.R., V.G. Cervantes, and A.N. Amirkhanian, Accelerated performance testing of concrete pavement with short slabs. International Journal of Pavement Engineering, 2012. 13(6): p. 494-507. [14] Altoubat, S.A., et al., Simplified method for concrete pavement design with discrete structural fibers. Construction and Building Materials, 2008. 22(3): p. 384-393. [15] ASTM, C 1116/C 1116M-10a (2015), Standard specification for fiber-reinforced concrete. 2015: ASTM International, West Conshohocken, PA. [16] Ashteyat, A.M., et al., Mechanical and durability behaviour of roller-compacted concrete containing white cement by pass dust and polypropylene fibre. European Journal of Environmental and Civil Engineering, 2019: p. 1-18. [17] Algin, Z. and S. Gerginci, Freeze-thaw resistance and water permeability properties of roller compacted concrete produced with macro synthetic fibre. Construction and Building Materials, 2020. 234: p. 117382-117382. [18] Madhkhan, M., R. Azizkhani, and M.E.T. Harchegani, Effects of pozzolans together with steel and polypropylene fibers on mechanical properties of RCC pavements. Construction and Building Materials, 2012. 26(1): p. 102-112. [19] Rooholamini, H., A. Hassani, and M.R.M. Aliha, Fracture properties of hybrid fibre-reinforced roller-compacted concrete in mode I with consideration of possible kinked crack. Construction and Building Materials, 2018. 187: p. 248-256. [20] Sukontasukkul, P., et al., Case investigation on application of steel fibers in roller compacted concrete pavement in Thailand. Case studies in construction materials, 2019. 11: p. e00271-e00271. [21] PCA, Guide Specification for Construction of Roller-Compacted Concrete Pavements. 2004: Portland Cement Association. [22] Li, B., et al., Effects of fiber type, volume fraction and aspect ratio on the flexural and acoustic emission behaviors of steel fiber reinforced concrete. Construction and Building Materials, 2018. 181: p. 474-486. [23] Cao, Y.Y.Y. and Q.L. Yu, Effect of inclination angle on hooked end steel fiber pullout behavior in ultra-high performance concrete. Composite Structures, 2018. 201(June): p. 151-160. [24] Tuyan, M. and H. Yazici, Pull-out behavior of single steel fiber from SIFCON matrix. Construction and Building Materials, 2012. 35: p. 571-577. [25] ASTM, C 1170/C 1170M-08, Standard Test Method for Determining Consistency and Density of Roller-Compacted Concrete Using a Vibrating Table. 2008: ASTM International, West Conshohocken, PA. [26] ASTM, C192 / C192M-16a Standard Practice for Making and Curing Concrete Test Specimens in the Laboratory. 2016: ASTM International, West Conshohocken, PA. [27] ASTM, C 39/C 39M-05, Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens. 2005: ASTM International, West Conshohocken, PA. [28] ASTM, C 496/C 496M-04, Standard Test Method for Splitting Tensile Strength of Cylindrical Concrete Specimens. 2004: ASTM International, West Conshohocken, PA. [29] ASTM, C 1609/C 1609M-12, Standard Test Method for Flexural Performance of Fiber-Reinforced Concrete. 2012: ASTM International, West Conshohocken, PA. [30] Rooholamini, H., A. Hassani, and M.R.M. Aliha, Evaluating the effect of macro-synthetic fibre on the mechanical properties of roller-compacted concrete pavement using response surface methodology. Construction and Building Materials, 2018. 159: p. 517-529. [31] Chhorn, C., et al., Evaluation on compactibility and workability of roller-compacted concrete for pavement. International Journal of Pavement Engineering, 2019. 20(8): p. 905-910. [32] Chhorn, C. and S.W. Lee, Consistency control of roller-compacted concrete for pavement. KSCE Journal of Civil Engineering, 2017. 21(5): p. 1757-1763. [33] Han, J., et al., Effects of steel fiber length and coarse aggregate maximum size on mechanical properties of steel fiber reinforced concrete. Construction and Building Materials, 2019. 209: p. 577-591. [34] Yazıcı, Ş., G. İnan, and V. Tabak, Effect of aspect ratio and volume fraction of steel fiber on the mechanical properties of SFRC. Construction and Building Materials, 2007. 21(6): p. 1250-1253. [35] Şahin, Y. and F. Köksal, The influences of matrix and steel fibre tensile strengths on the fracture energy of high-strength concrete. Construction and Building Materials, 2011. 25(4): p. 1801-1806. [36] Buratti, N., C. Mazzotti, and M. Savoia, Post-cracking behaviour of steel and macro-synthetic fibre-reinforced concretes. Construction and Building Materials, 2011. 25(5): p. 2713-2722. [37] Abbass, W., M.I. Khan, and S. Mourad, Evaluation of mechanical properties of steel fiber reinforced concrete with different strengths of concrete. Construction and Building Materials, 2018. 168: p. 556-569. [38] Afroughsabet, V. and T. Ozbakkaloglu, Mechanical and durability properties of high-strength concrete containing steel and polypropylene fibers. Construction and Building Materials, 2015. 94: p. 73-82. [39] Hesami, S., S. Ahmadi, and M. Nematzadeh, Effects of rice husk ash and fiber on mechanical properties of pervious concrete pavement. Construction and Building Materials, 2014. 53: p. 680-691. [40] Wu, Z., et al., Effects of steel fiber content and shape on mechanical properties of ultra high performance concrete. Construction and Building Materials, 2016. 103: p. 8-14. | ||
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