تعداد نشریات | 31 |
تعداد شمارهها | 748 |
تعداد مقالات | 7,112 |
تعداد مشاهده مقاله | 10,246,190 |
تعداد دریافت فایل اصل مقاله | 6,899,898 |
بررسی آزمایشگاهی تاثیر درشت دانه های بتنی بازیافتی بر خواص مرتبط با دوام بتن های تماماً بازیافتی حاوی پوزولان | ||
تحقیقات بتن | ||
دوره 15، شماره 2 - شماره پیاپی 38، تیر 1401، صفحه 79-96 اصل مقاله (1.08 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22124/jcr.2022.19278.1491 | ||
نویسندگان | ||
سیدفتح اله ساجدی* 1؛ حسن جلیلی فر2 | ||
1دانشیار، گروه عمران، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران | ||
2گروه عمران، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران | ||
چکیده | ||
تحقیق آزمایشگاهی حاضر به بررسی دو خاصیت مکانیکی و بهویژه دوام بتنهای تماما بازیافتی حاوی پوزولانهای زئولیت طبیعی، میکروسیلیس و خاکستربادی پرداخته است. بتنهای بازیافتی متشکل از درشتدانههای بتنی بازیافت شده و حاوی درصدهای مختلف جایگزینی میکروسیلیس، خاکستربادی و زئولیت طبیعی میباشند. در مجموع 11 طرح اختلاط ساخته شدند که شامل بتن معمولی مرجع، بتن %100 بازیافتی بدون پوزولان و 9 طرح اختلاط از بتنهای تماما بازیافتی حاوی مواد پوزولانی مذکور به صورت کاربردهای جداگانه می-باشند. برای بررسی و مقایسه برخی از خواص مکانیکی و بهویژه خواص وابسته به دوام این نوع بتنها، در بازه سنی 28 تا 91 روزه، مقاومت فشاری، در بازه سنی 28 روزه سرعت انتشار امواج فراصوت، و در بازه سنی 180 روزه نیز آزمایشهای جذب آب غوطهوری، جذب آب مویینه، مقاومت ویژه الکتریکی و ضریب هدایت الکتریکی نمونههای ساخته شده از این نوع بتنها، اندازهگیری شدند. نتایج نشان دادند که گرچه جایگزینی کامل درشتدانههای بازیافتی در این نوع بتنها منجر به افت مقاومت فشاری آنها نسبت به بتن مرجع میشود، ولی جایگزینی مواد پوزولانی مانند میکروسیلیس در بتنهای تماما بازیافتی قادر است تا منجر به کسب مقاومت فشاری بیشتری نسبت به بتن مرجع گردد. همچنین میزان افت خواص وابسته به دوام در بتنهای تماما بازیافتی بدون پوزولان نسبت به بتن مرجع، در مقایسه با افت حاصله در خواص مکانیکی به مراتب بیشتر است. با اینحال بهدلیل تغییر در ساختار شیمیایی بتنهای بازیافتی ناشی از مواد پوزولانی مانند زئولیت طبیعی، برخی از خواص وابسته به دوام این بتنها در مقایسه با بتنهای معمولی، تغییر محسوسی نداشتند. | ||
کلیدواژهها | ||
سنگدانه بازیافتی؛ بتن بازیافتی؛ خواص مکانیکی؛ دوام؛ پوزولان | ||
مراجع | ||
[1] Dhir, R. K., McCarthy, M. J., Halliday, J. E., Tang, M. C. ASR testing on recycled aggregates guidance on alkali limits and reactivity. DTI/WRAP Aggregates Research Programme STBF, (2005) 13.
[2] Leite, M. B. Evaluation of the mechanical properties of concrete produced with recycled aggregates from construction and demolition wastes, Brasil: PhD Thesis, Federal University of Rio Grande do Sul, Rio Grande do Sul, (2001).
[3] Khalaf, F. M. Using crushed clay brick as coarse aggregate in concrete. Journal of Materials in Civil Engineering, 18(4), (2006) 518-526.
[4] Rao, A., Jha, K. N., Misra, S. Use of aggregates from recycled construction and demolition waste in concrete. Resources, conservation and Recycling, 50(1), (2007) 71-81.
[5] Pereira, P., Evangelista, L., De Brito, J. The effect of superplasticizers on the mechanical performance of concrete made with fine recycled concrete aggregates. Cement and concrete composites, 34(9), (2012) 1044-1052.
[6] Sajedi, F., Jalilifar, H. Evaluating and comparing the effect of zeolite, micro-silica, and fly ash on the mechanical properties of recycled concrete made of 100% recycled aggregates. Journal of Structural and Construction Engineering, 6(Special Issue 4), (2019) 165-180.
[7] Dhir, R. K., Paine, K. A. Suitability and practicality of using coarse RCA in normal and high-strength concrete. In 1st International Conference on Sustainable Construction: Waste Management. (2004).
[8] Etxeberria, M., Vázquez, E., Marí, A., Barra, M. Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete. Cement and concrete research, 37(5), (2007) 735-742.
[9] Yang, K. H., Chung, H. S., Ashour, A. F. Influence of Type and Replacement Level of Recycled Aggregates on Concrete Properties. (2008).
[10] Limbachiya, M. C. Coarse recycled aggregates for use in new concrete. In Proceedings of the Institution of Civil Engineers-Engineering Sustainability. 157(2), (2004) 99-106.
[11] Dhir, R. K., Limbachiya, M. C., Leelawat, T. Suitability of recycled concrete aggregate for use in BS 5328 designated mixes. In Proceedings of the Institution of Civil Engineers: Structures and Buildings, 134(3), (1999).
[12] Senaratne, S., Lambrousis, G., Mirza, O., Tam, V. W., Kang, W. H. Recycled concrete in structural applications for sustainable construction practices in Australia. Procedia engineering, 180, (2017) 751-758.
[13] Kou, S. C., and Poon, C. S. Enhancing the durability properties of concrete prepared with coarse recycled aggregate, Construction and Building Materials, 35, (2012) 69-76.
[14] Kou, S. C., and Poon, C. S. A comparative study of using river sand, crushed fine stone, furnace bottom ash and fine recycled aggregate as fine aggregates for concrete production Excellence in Concrete Construction through Innovation-Proceedings of the International Conference on Concrete Construction. In Excellence in Concrete Construction through Innovation: Proceedings of the conference held at the Kingston University, United Kingdom, (2008) 459.
[15] Gonçalves, A., Esteves, A., Vieira, M. Influence of recycled concrete aggregates on concrete durability. Presented at the International RILEM Conference on the Use of Recycled Materials in Buildings and Structures, (2004) 554-562.
[16] Amorim, P., de Brito, J., Evangelista, L. Concrete made with coarse concrete aggregate: Influence of curing on durability. ACI Materials Journal, 109(2), (2012) 195-204.
[17] Gomes, M., de Brito, J. Structural concrete with incorporation of coarse recycled concrete and ceramic aggregates: durability performance. Materials and Structures, 42(5), (2009) 663-675.
[18] Hobbs, D. W. Aggregate influence on chloride ion diffusion into concrete. Cement and Concrete Research, 29(12) (1999) 1995-1998.
[19] Dhir R. K., Dyer T. D., Paine K. A. Dismantling barriers: Roles for research in realizing markets for construction and demolition wastes. Presented at 1st International Conference on Sustainable Construction: Waste Management, (2004) 1-22.
[20] Koulouris, A., Limbachiya, M. C., Fried, A. N., Roberts, J. J. Use of recycled aggregate in concrete application: Case studies. Presented at the International Conference on Sustainable Waste Management and Recycling: Challenges and Opportunities, (2004) 245-257.
[21] Limbachiya, M., Meddah, M. S., Ouchagour, Y. Performance of Portland/silica fume cement concrete produced with recycled concrete aggregate. ACI Materials Journal, 109(1), (2012) 91-100.
[22] Dhir, R. K., Paine, K. Value added sustainable use of recycled and secondary aggregates in concrete. Indian Concrete Journal, 84(3), (2010) 7-26.
[23] Pedro, D., De Brito, J., Evangelista, L. Influence of the use of recycled concrete aggregates from different sources on structural concrete. Construction and Building Materials, 71, (2014) 141-151.
[24] Nagataki, S., Gokce, A., Saeki, T., Hisada, M. Assessment of recycling process induced damage sensitivity of recycled concrete aggregates. Cement and concrete research, 34(6), (2004) 965-971.
[25] Padmini, A. K., Ramamurthy, K., Mathews, M. S. Relative moisture movement through recycled aggregate concrete. Magazine of concrete research, 54(5), (2002) 377-384.
[26] Iranian Management Organization, Iranian Concrete Code (ICC). 6 ed., 120, Tehran, Iran, (2003).
[27] ASTM C127-15, Standard Test Method for Relative Density (Specific Gravity) and Absorption of Coarse Aggregate, ASTM International, West Conshohocken, PA, (2015).
[28] De Juan, M.S., Gutiérrez, P.A. Study on the influence of attached mortar content on the properties of recycled concrete aggregate. Construction and Building Materials, 23(2), (2009) 872-877.
[29] Tateyashiki, H., Shima, H., Matsumoto, Y., Koga, Y. Properties of concrete with high quality recycled aggregate by heat and rubbing method. Proc. JCI, 23(2), (2001) 61-66.
[30] Katz, A. Treatments for the improvement of recycled aggregate. Journal of Materials in Civil Engineering, 16(6), (2004) 597-603.
[31] Tam, V. W., Tam, C. M., Le, K. N. Removal of cement mortar remains from recycled aggregate using pre-soaking approaches. Resources, Conservation and Recycling, 50(1), (2007) 82-101.
[32] Kou, S. C., Poon, C. S. Properties of concrete prepared with PVA-impregnated recycled concrete aggregates. Cement and Concrete Composites, 32(8), (2010) 649-654.
[33] BS 1881: 116. Methods for the Determination of Compressive Strength of Concrete. BSI, Linfordwood, Milton Keynes MK14 6LE, UK, (1983).
[34] Whitehurst, E. A. Soniscope tests concrete structures. In Journal Proceedings. 47(2), (1951). 433-444.
[35] ASTM C642-13, Standard Test Method for Density, Absorption, and Voids in Hardened Concrete, ASTM International, West Conshohocken, PA, (2013).
[36] ASTM C1585-13, Standard Test Method for Measurement of Rate of Absorption of Water by Hydraulic-Cement Concretes, ASTM International, West Conshohocken, PA, (2013).
[37] Browne, R. D. Field investigations: site laboratory tests: maintenance, repair and rehabilitation of concrete structures. Lisbon: CEEC; (1991).
[38] ASTM C1760-12, Standard Test Method for Bulk Electrical Conductivity of Hardened Concrete, ASTM International, West Conshohocken, PA, (2012).
[39] Hansen, T. C. Recycling of Demolished Concrete and Masonry. London, UK, E & FN Spon, (1992).
[40] Kanellopoulos, A., Nicolaides, D., Petrou, M. F. Mechanical and durability properties of concretes containing recycled lime powder and recycled aggregates. Construction and Building Materials, 53, (2014) 253-259.
[41] Rao, M. C., Bhattacharyya, S. K., Barai, S. V. Influence of different demolished old structures concrete as aggregate on properties of concrete. Indian Concrete Journal, 91, (2017) 68–85
[42] González-Fonteboa, B., Seara-Paz, S., De Brito, J., González-Taboada, L., Martínez-Abella, F., Vasco-Silva, R. Recycled concrete with coarse recycled aggregate. An overview and analysis. Materiales de Construcción, 68(330), (2018) 151.
[43] Guo, H., Shi, C., Guan, X., Zhu, J., Ding, Y., Ling, T. C., Wang, Y. Durability of recycled aggregate concrete–a review. Cement and Concrete Composites, 89, (2018) 251-259.
[44] Pedro, D., de Brito, J., Evangelista, L. Durability performance of high-performance concrete made with recycled aggregates, fly ash and densified silica fume. Cement and Concrete Composites, 93, (2018) 63-74.
[45] Kurda, R., de Brito, J., Silvestre, J.D. Water absorption and electrical resistivity of concrete with recycled concrete aggregates and fly ash. Cement and Concrete Composites, 95, (2019) 169-182. | ||
آمار تعداد مشاهده مقاله: 250 تعداد دریافت فایل اصل مقاله: 294 |