پیوندهای مفید
آمار
| تعداد نشریات | 7 |
| تعداد شماره‌ها | 399 |
| تعداد مقالات | 5,389 |
| تعداد مشاهده مقاله | 5,288,172 |
| تعداد دریافت فایل اصل مقاله | 4,882,906 |
مطالعه آزمایشگاهی خصوصیات مکانیکی و ریزساختار ملات سیمانی حاوی پودرهای شیشه، پوسته تخم مرغ، آهن و لاستیک تحت شرایط محیطی اسیدی، خنثی و بازی | ||
| نشریه مهندسی عمران امیرکبیر | ||
| مقاله 2، دوره 55، شماره 12، 1402، صفحه 2365-2404 اصل مقاله (3.31 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2023.21291.7677 | ||
| نویسندگان | ||
| جواد محسنی پور اصل؛ مجید قلهکی* ؛ محمدکاظم شربتدار | ||
| دانشکده عمران، دانشگاه سمنان، سمنان، ایران | ||
| چکیده | ||
| در این مقاله به بررسی خصوصیات مکانیکی و ریزساختار ملات سیمانی حاوی ضایعات بازیافتی مختلف تحت شرایط محیطی اسیدی، خنثی و بازی پرداخته شده است. ضایعات بازیافتی شامل پودرهای شیشه، پوسته تخم مرغ، آهن و لاستیک در مقادیر 7، 14 و 21 درصد وزنی جایگزین سیمان شدند. پس از انجام آزمایش روانی (مینی‌اسلامپ)، کلیه نمونه ها در سنین 7، 28 و 90 روزه تحت آزمایشات مقاومت فشاری، کششی و خمشی و جذب آب و همچنین آزمایشات ریزساختار شامل آزمایش میکروسکوپ الکترونیکی(SEM) و آزمایش پراش اشعه ایکس (XRD) قرار گرفتند. محیط اسیدی با PH=2.5 و محیط بازی با PH=12.5 و محیط خنثی (آب معمولی) با PH=7 برای انجام عمل آوری نمونه‌ها در نظر گرفته شدند. نتایج حاکی از آن است که بیشترین میزان افزایش مقاومت فشاری، کششی و خمشی نسبت به نمونه مرجع، به ترتیب برابر 33% در محیط اسیدی، 90% در محیط خنثی و اسیدی و 67% در محیط اسیدی ملات سیمانی می باشد و حضور ضایعات بازیافتی کمک شایانی در بهبود مشخصات مکانیکی در شرایط عمل آوری اسیدی می کند. همچنین افزودن پودر لاستیک به ترکیب ملات سیمانی سبب کاهش مقاومت فشاری، کششی و خمشی تا 6/11، 2 و2/6 برابر نسبت به نمونه مرجع شده است که استفاده از آن در پروژه های عمرانی، به لحاظ فنی توصیه نمی شود. با استفاده از پودرهای شیشه، آهن و پودر پوسته تخم در مقادیر 7 درصد، می توان میزان جذب آب نمونه ها را در سنین 7، 28 و 90 روزه تا 7/11، 13/22 و9/29 درصد نسبت به نمونه مرجع کاهش داد. نتایج آزمایشات ریزساختار نیز نشان از کاهش 3 برابری عرض ترک‌ها و حفرات موجود در نمونه های حاوی پودرهای شیشه، آهن و پوسته تخم مرغ داشته و پیوند خمیر سیمان و افزودنی ها نیز قوی‌تر شده است. | ||
| کلیدواژه‌ها | ||
| ملات سیمانی؛ ضایعات بازیافتی؛ خصوصیات مکانیکی؛ میکروسکوپ الکترونیکی؛ پراش اشعه ایکس؛ محیط های اسیدی و بازی | ||
| موضوعات | ||
| تکنولوژی بتن؛ مواد و مصالح | ||
| عنوان مقاله [English] | ||
| An Experimental Investigation into the Mechanical Performance and Microstructure of Cementitious Mortars Containing Recycled Waste Materials Subjected to Various Environments | ||
| نویسندگان [English] | ||
| javad mohseni pour asl؛ majid gholhaki؛ Mohammad Kazem Sharbatdar | ||
| MSc, Semnan University, Semnan, Iran. | ||
| چکیده [English] | ||
| This paper deals with an experimental investigation into the mechanical performance and microstructure characteristics of cementitious mortars containing recycled waste materials subjected to acidic, neutral, and alkaline environments. The recycled waste materials include glass, eggshell, iron, and rubber powder in various amounts, namely 7, 14, and 21% by volume, as the replacement for ordinary Portland cement (OPC). In this respect, to examine the mechanical performance of the specimens, the compressive, tensile, and bending strength tests as well as water absorption tests were carried out at the ages of 7, 28, and 90 days. Moreover, to study the microstructure of the specimens, scanning electron microscopy (SEM) and x-ray diffraction (XRD) tests were conducted accordingly. For curing the specimens, three different environments with PH values of 2.5, 12.5, and 7 representing the acidic, alkaline, and neutral environments, were taken into account. Promisingly, it was observed that the inclusion of recycled waste materials significantly enhanced the mechanical properties of the mortar when exposed to acidic curing conditions. Lastly, the results derived from the microstructure tests revealed that as a result of replacing cement with glass, iron, and eggshell powders, the width of cracks and volume of the pores decreased by three times, and importantly, the bonding between the cement paste and additives was strengthened. | ||
| کلیدواژه‌ها [English] | ||
| Cementitious Mortar, recycled waste materials, mechanical properties, Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), acidic and alkaline environments | ||
|
سایر فایل های مرتبط با مقاله
|
||
| مراجع | ||
|
[1] C.L. Page, M.M. Page, Durability of Concrete and Cement Composites, Elsevier, 2007. [2] MK Sharbatdar, F Rahmati, Experimental evaluation of multi-functional effects of fibers on mechanical and performance properties of Roller-compacted concrete pavements (RCCP), Construction and Building Materials, 2022, 316, 125890. [3] MK Sharbatdar, A Tajari, Experimental in-plane seismic strengthening of masonry infilled reinforced concrete frames by engineered cementitious composites (ECC), Construction and Building Materials, 2021, 293, 123529. [4] V.R. Zivica, A. Bajza, Acidic attack of cement-based materials- a review: Part 2. Factors of rate of acidic attack and protective measures, Constr. Build. Mater. 16 (4) (2002) 215–222. [5] Pachideh G, Gholhaki M, Moshtagh A. On the post-heat performance of cement mortar containing silica fume or Granulated Blast-Furnace Slag. Journal of Building Engineering, (2019), 24, 100757. [6] Pachideh G, Gholhaki M. Effect of pozzolanic materials on mechanical properties and water absorption of autoclaved aerated concrete. Journal of Building Engineering, (2019), 26, 100856 [7] Amar, M., Benzerzour, M., Safhi, A.E.M., Abriak, N.-E., 2018. Durability of a cementitious matrix based on treated sediments. Case Stud. Constr. Mater. 8, 258–276. [8] Rao, K.J., Keerthi, K., Vasam, S., 2018. Acid resistance of quaternary blended recycled aggregate concrete. Case Stud. Constr. Mater. 8, 423–433. [9] Binici H, Aksogan O, Sevinc AH, Cinpolat E. Mechanical and radioactivity shielding performances of mortars made with cement, sand and egg shells. Construction and Building Materials. 2015 Sep 15; 93: 1145-50. [10] Angelin AF, Lintz RC, Gachet-Barbosa LA, Osorio WR. The effects of porosity on mechanical behavior and water absorption of an environmentally friendly cement mortar with recycled rubber. Construction and Building Materials. 2017 Oct 1; 151: 534-45. [11] Pachideh G, Gholhaki M, Ketabdari H. Effect of pozzolanic wastes on mechanical properties, durability and microstructure of the cementitious mortars. Journal of Building Engineering. 2020 May 1; 29: 101178. [12] Patel D, Shrivastava R, Tiwari RP, Yadav RK. Properties of cement mortar in substitution with waste fine glass powder and environmental impact study. Journal of Building Engineering. 2020 Jan 1; 27: 100940. [13] Gupta T, Siddique S, Sharma RK, Chaudhary S. Effect of aggressive environment on durability of concrete containing fibrous rubber shreds and silica fume. Structural Concrete. 2021 Oct;22(5):2611-23. [14] Tayeh BA, Al Saffar DM. Utilization of waste iron powder as fine aggregate in cement mortar. journal of engineering research and technology. 2018;5(2). [15] Pham NP, Toumi A, Turatsinze A. Evaluating damage of rubberized cement-based composites under aggressive environments. Construction and Building Materials. 2019 Aug 30; 217: 234-41. [16] Tayeh BA, Al Saffar DM, Aadi AS, Almeshal I. Sulphate resistance of cement mortar contains glass powder. Journal of King Saud University-Engineering Sciences. 2020 Dec 1; 32(8):495-500. [17] Gupta T, Siddique S, Sharma RK, Chaudhary S. Behaviour of waste rubber powder and hybrid rubber concrete in aggressive environment. Construction and Building Materials. 2019 Aug 30; 217: 283-91. [18] Collins, F., J. Lambert, and W.H. Duan, the influences of admixtures on the dispersion, workability, and strength of carbon nanotube–OPC paste mixtures. Cement and Concrete Composites, 2012. 34(2): p. 201-207. [19] NF EN 12390-13 AFNOR. 2013 Testing hardened concrete, in: Determination of Secant Modulus of Elasticity in Compression, 418–455. [20] ASTM C1609/C1609M. Standard Test Method for Flexural Performance of Fiber‐Reinforced Concrete (Using Beam with Third‐Point Loading); ASTM International: West Conshohocken, PA, USA, 2012; pp. 1–9. [21] ASTM C642-13, Standard Test Method for Density, Absorption, and Voids in Hardened Concrete, ASTM International, West Conshohocken, PA, (2013), www.astm.org. [22] Pliya P, Cree D. Limestone derived eggshell powder as a replacement in Portland cement mortar. Construction and Building Materials. 2015 Oct 1; 95: 1-9. [23] Omar Ibrahim O.M, Tayeh B.A. Combined effect of lightweight fine aggregate and micro rubber ash on the properties of cement mortar. Advances in concrete construction. 2020; 10(10 (6) 537-546). [24] Vafaei M, Allahverdi A, Dong P, Bassim N. Acid attack on geopolymer cement mortar based on waste-glass powder and calcium aluminate cement at mild concentration. Construction and Building Materials. 2018 Dec 30; 193: 363-372. [25] Alaa Jaber H, Salahuddin Mahdi R, K.Hassan A. Influence of eggshell powder on the Portland cement mortar properties. Materials Today: Proceedings. https://doi.org/10.1016/j.matpr.2019.09.153. [26] Cree D, Pliya P. Effect of elevated temperature on eggshell, eggshell powder and eggshell powder mortars for masonry applications. Journal of Building Engineering. 2019, 26, 100852. [27] Chaïd R, Kenaï S, Zeroub H, Jauberthie R. Microstructure and permeability of concrete with glass powder addition conserved in the sulphatic environment. European Journal of Environmental and Civil Engineering. 2015, 19: 2, 219-237. [28] Othman R, Wei Chong B, Putra Jaya R, Mohd Hasan MR, Al Bakri Abdullah MM, Haziman M. Wan Ibrahim. Evaluation on the rheological and mechanical properties of concrete incorporating eggshell with tire powder. journal of materials research and technology 2021, 14: 439-451. [29] Ramdani S, Guettala A, Benmalek ML, B.Aguiar J. Physical and mechanical performance of concrete made with waste rubber aggregate, glass powder and silica sand powder. Journal of Building Engineering. 2019, 21, 302-311. [30] Lal Jain K, Sancheti G, Kumar Gupta L. Durability performance of waste granite and glass powder added Concrete. Construction and Building Materials. 2020, 252, 119075. [31] Shamsudeen Abdulazeez A, Usman N, Adamu Idi M, Gabriel U. Suitability of Waste Glass Powder as Partial Cement Replacement in Concrete Subject to Chemical Aggressive Environment. International Journal of Latest Technology in Engineering, Management & Applied Science (IJLTEMAS). 2020, 9: 2, 45-52. | ||
|
آمار تعداد مشاهده مقاله: 311 تعداد دریافت فایل اصل مقاله: 382 |
||
