پیوندهای مفید
آمار
| تعداد نشریات | 7 |
| تعداد شماره‌ها | 404 |
| تعداد مقالات | 5,423 |
| تعداد مشاهده مقاله | 5,526,328 |
| تعداد دریافت فایل اصل مقاله | 5,023,205 |
مطالعه تغییرات مشخصات مکانیکی بتن‌های حاوی بنتونیت و زئولیت در جایگزینی سیمان | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 11، دوره 53، شماره 8، آبان 1400، صفحه 3355-3370 اصل مقاله (1.95 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2020.17839.6707 | ||
| نویسندگان | ||
| فاطمه عبدالشاه1؛ امید رضائی فر* 2؛ مجید قلهکی2 | ||
| 1مهندسی عمران-سازه، دانشکده عمران، دانشگاه سمنان | ||
| 2عضو هیات علمی دانشگاه سمنان | ||
| چکیده | ||
| در عصر امروز ساخت مصالح ساختمانی مستلزم مصرف زیاد منابع طبیعی میباشد. به جهت تأمین مصالح مورد نیاز برای تولید سیمان، آلودگی و تولید زباله‌های صنعتی افزایش مییابد. زئولیت و بنتونیت از جمله پوزولان‌های طبیعی هستند که به راحتی قابل استخراج می‌باشند و با شرایط محیط زیست سازگاری دارند و از جمله موادی هستند که در مقایسه با سیمان پرتلند هزینه تولید کمتری دارند. در تحقیقات انجام شده، هر کدام از این پوزولان‌ها با مواد دیگر و یا به صورت منفرد مورد استفاده قرارگرفته‌اند. در این مقاله به بررسی مقاومت فشاری، جذب آب، مقاومت کششی و مدول الاستیسیته پرداخته شده است. در این تحقیق 10 مدل طرح اختلاط مورد بررسی قرار گرفته است، که نمونههای تولید شده با درصد بنتونیت و زئولیت متفاوت در آزمایشگاه ساخته و در سنین 7، 28 و 90 روزه مورد آزمایش قرار گرفته‌اند. جهت بررسی تأثیر رفتار استفاده از این مصالح به جای سیمان در بتن، نتایج به دست آمده با نمونه مرجع مورد مقایسه قرار گرفته است. بهترین ترکیب با جایگزینی 6 درصد زئولیت و 6 درصد بنتونیت بوده که پس از 28 روز، توانسته 93 درصد مقاومت نمونه مرجع با مقاومت 25/12 مگاپاسکال را کسب کند. درصد جذب آب نمونههای تولید شده با زئولیت و بنتونیت نسبت به نمونه مرجع افزایش یافته است و بهترین ترکیبات در کشش، نمونههای با 10 درصد بنتونیت بودهاند. | ||
| کلیدواژه‌ها | ||
| زئولیت؛ بنتونیت؛ مواد مکمل سیمانی؛ مقاومت فشاری؛ جذب آب | ||
| موضوعات | ||
| تکنولوژی بتن | ||
| عنوان مقاله [English] | ||
| Mechanical Properties of Concrete Incorporating Bentonite and Zeolite as Replacement of Cement | ||
| نویسندگان [English] | ||
| fatemeh abdolshah1؛ omid rezayfar2؛ majid gholhaki2 | ||
| 1Structural Engineering, Faculty of Civil Engineering, Semnan University | ||
| 2Faculty Member of Semnan University | ||
| چکیده [English] | ||
| The production of concrete consumes huge amounts of natural resources. Due to the consumption of natural resources for cement production, using industrial waste materials has gained interest among researchers. Environmental issues are one of the most important issues that should be taken into consideration. Zeolite and bentonite are considered as natural pozzolans, they are easy to extract and count as environmentally-friendly raw material compared to ordinary Portland cement (OPC). In the current study, these materials were utilized blended with other materials and individually. Compressive strength, water absorption, tensile strength, and elastic modulus of concrete samples were evaluated. Moreover, 10 different mixing designs were designed to produce samples in the same curing condition with different content of bentonite and zeolite. These samples were cured for 7, 28, and 90 days. To investigate the properties of these materials as an alternative to OPC in the concrete, the results are compared with the blank sample. The optimum mixture was obtained by 6 wt. % of zeolite and 6 wt. % of bentonite, which was gained 93% of the compressive strength of the blank sample, i.e., 12.25 MPa, after 28 days of curing. This study also showed that the water absorption of samples with zeolite and bentonite had increased in comparison with the blank sample and the optimum amount in tension was observed 10 wt. % of bentonite. | ||
| کلیدواژه‌ها [English] | ||
| Zeolite, Bentonite, Cement additives, Compressive strength, Water absorption | ||
| مراجع | ||
|
[1] K.C. Onyelowe, T. Amhadi, C. Ezugwu, H. Ugwuanyi, U. Iro, I. Jideofor, E. Amanamba, D.B. Van, A.B. Salahudeen, F. Sosa, Strength of pozzolan soil blend in chemically improved lateritic soil for pavement base material purpose, International Journal of Low-Carbon Technologies, 14(3) (2019) 410-416. [2] V. Glinskiy, L. Serga, M. Khvan, Assessment of Environmental Parameters Impact on the Level of Sustainable Development of Territories, Procedia CIRP, 40 (2016) 625-630. [3] A.M. Rashad, Metakaolin as cementitious material: History, scours, production and composition-A comprehensive overview, Construction and Building Materials, 41 (2013) 303-318. [4] Kunal, R. Siddique, A. Rajor, Use of cement kiln dust in cement concrete and its leachate characteristics, Resources, Conservation and Recycling, 61 (2012) 59-68. [5] R. Siddique, J. Klaus, Influence of metakaolin on the properties of mortar and concrete: A review, Applied Clay Science, 43 (2009) 392-400. [6] O. Rezaifar, M. Hasanzadeh, M. Gholhaki, Concrete made with hybrid blends of crumb rubber and metakaolin: Optimization using Response Surface Method, Construction and Building Materials, 123 (2016) 59-68. [7] I. Abavisani, O. Rezaifar, A. Kheyroddin, Alternating Magnetic Field Effect on Fine-aggregate Concrete Compressive Strength, Construction and Building Materials, 134 (2017) 83-90. [8] A. Terzić, L. Pezo, N. Mijatović, J. Stojanović, M. Kragović, L. Miličić, L. Andrić, The effect of alternations in mineral additives (zeolite, bentonite, fly ash) on physico-chemical behavior of Portland cement based binders, Construction and Building Materials, 180 (2018) 199-210. [9] S.A. Memon, R. Arsalan, S. Khan, T.Y. Lo, Utilization of Pakistani bentonite as partial replacement of cement in concrete, Construction and Building Materials, 30 (2012) 237-242. [10] J. Mirza, M. Riaz, A. Naseer, F. Rehman, A.N. Khan, Q. Ali, Pakistani bentonite in mortars and concrete as low cost construction material, Applied Clay Science, 45 (2009) 220-226. [11] H. Yang, D. Long, L. Zhenyu, H. Yuanjin, Y. Tao, H. Xin, W. Jie, L. Zhongyuan, L. Shuzhen, Effects of bentonite on pore structure and permeability of cement mortar, Construction and Building Materials, 224 (2019) 276-283. [12] B.A. Junaid akbar, M. Ashraf, S. Afzal, A. Ahmad, K. Shahzada, Evaluating the Effect of Bentonite on Strength and Durability of High Performance Concrete, International Journal of Advanced Structures and Geotechnical Engineering, 02 (2013) 1-5. [13] C. Targan, A. Olgun, Y. Erdogan, V. Sevinc, Effects of supplementary cementing materials on the properties of cement and concrete, in: Cement and Concrete Research, 2002, pp. 1551-1558. [14] Rezaifar.Omid, S.M. Qiyami Taklimi, M. Gholhaki, Effect of Substitution of Natural Calcareous and Clay Materials with Cement in Low-Carbon Concretes, Transportation Infrastructure Engineering (JTIE), 5 (2019) 40-49. [15] M.L. Nehdi, Clay in cement-based materials: Critical overview of state-of-the-art, Construction and Building Materials, 51 (2014) 37 382. [16] A. Martucci, L. Pasti, N. Marchetti, A. Cavazzini, F. Dondi, A. Alberti, Adsorption of pharmaceuticals from aqueous solutions on synthetic zeolites, Microporous and Mesoporous Materials, 148 (2012) 174-183. [17] Y.T. Tran, J. Lee, P. Kumar, K.H. Kim, S.S. Lee, Natural zeolite and its application in concrete composite production, Composites Part B: Engineering, 165 (2019) 354-364. [18] N.M. Altwair, M.A. Megat Johari, S.F. Saiyid Hashim, Flexural performance of green engineered cementitious composites containing high volume of palm oil fuel ash, Construction and Building Materials, 37 (2012) 518-525. [19] C.S. Poon, L. Lam, S.C. Kou, Z.S. Lin, A study on the hydration rate of natural zeolite blended cement pastes, Construction and Building Materials, 13 (1999) 427-432. [20] S.Y.N. Chan, X. Ji, Comparative study of the initial surface absorption and chloride diffusion of high performance zeolite, silica fume and PFA concretes, Cement and Concrete Composites, 21 (1999) 293-300. [21] M. Najimi, J. Sobhani, B. Ahmadi, M. Shekarchi, An experimental study on durability properties of concrete containing zeolite as a highly reactive natural pozzolan, Construction and Building Materials, 35 (2012) 1023-1033. [22] B. Ahmadi, M. Shekarchi, Use of natural zeolite as a supplementary cementitious material, Cement and Concrete Composites, 32(2) (2010) 134-141. [23] C. Bilim, Properties of cement mortars containing clinoptilolite as a supplementary cementitious material, Construction and Building Materials, (2011) 25-3180-3175. [24] G. Vamsi Krishna Reddy, V. Ranga Rao, Experimental Investigation of Strength Parameters of Cement and Concrete By Partial Replacement of Cement with Indian Calcium Bentonite, International Journal of Civil Engineering and Techn, (2017) 512-518. [25] L. Sing Wong, R Hashim, Faisal Al, Utilization of sodium bentonite to maximize the filler and pozzolanic effects of stabilized peat, Engineering Geology, (2013) 56-66. | ||
|
آمار تعداد مشاهده مقاله: 753 تعداد دریافت فایل اصل مقاله: 1,062 |
||