بررسی آزمایشگاهی اثر نوع قالب و روغن قالب بر مشخصات فیزیکی بتن خودتراکم

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه قم، قم، ایران

2 گروه مهندسی عمران، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

چکیده

امروزه علاوه‌بر خواص دوامی بتن، زیبایی‌شناختی و ظاهر آن نیز در حال تحقیق و بررسی است. حفظ ظاهر بتن تابع نوع بتن، ویژگی مصالح، نوع ساخت و عمل‌آوری است. از جمله پارامترهای مختلف تأثیرگذار بر روی زیبایی ظاهر بتن حین ساخت، نوع قالب، نوع روغن قالب و شرایط عمل‌آوری است. هدف اصلی این تحقیق، بررسی پارامترهای نوع قالب، شرایط عمل‌آوری و نوع روغن قالب در کیفیت ظاهری بتن می‌باشد. در این راستا نمونه‌های مختلفی با بتن خودتراکم، قالب‌های ABS، PVC، چوبی عمل‌آوری نشده، چوبی MDF و آهنی، با دو نوع روغن قالب بر پایه حلال آب و حلال نفت و یا عدم استفاده از روغن قالب و دو نوع شرایط عمل‌آوری که شامل عمل‌‌آوری در محیط آب و محیط خارج از آب می‌باشد مورد بررسی قرار گرفته است. آزمایشات مختلفی از جمله جذب آب، سایش، چکش اشمیت، نفوذ قطره آب انجام شده است. آزمایش قطره آب به جهت بررسی سریع کیفیت ظاهری بتن پیشنهاد و مورد بررسی قرار گرفته است. نتایج آزمایش‌ها نشان می‌دهد نمونه‌های ساخته‌شده با قالب‌های ABS و PVC در شرایط مختلف عملکرد مطلوبی دارند. نمونه‌های ABS با روغن قالب بر پایه حلال نفت در جذب آب مقاومت خوبی نشان دادند. نمونه‌های PVC با روغن قالب بر پایه آب در آزمایش چکش اشمیت مقاومت مناسبی در برابر ضربه داشتند. نمونه‌های ABS با روغن قالب بر پایه آب نیز در مقاومت فشاری عملکرد خوبی نشان دادند. آزمایش‌های سایش و بررسی سطح نشان دادند نمونه‌های ABS ساخته‌شده بدون روغن قالب کیفیت سطح بهتری دارند. نمونه‌های عمل‌آوری نشده در آب از نظر زیبایی بهتر بودند، در حالی که نمونه‌های عمل‌آوری شده در آب به دلیل تراکم بیشتر، خواص فیزیکی بهتری داشتند. به طور کلی، انتخاب مواد و شرایط ساخت بر کیفیت محصولات تأثیر قابل توجهی دارد و می‌تواند به بهینه‌سازی تولید کمک کند. 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Experimental Investigation of the Effect of Mold Type and Mold Oil on the Physical Characteristics of Self-Compacting Concrete

نویسندگان [English]

  • Neda Azizi 1
  • Mahdi Sharifi 1
  • Mohammad reza Shokrzadeh 2
1 Department of Civil Engineering, Faculty of Engineering, University of Qom, Qom, Iran
2 Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
چکیده [English]

Today, in addition to the durability properties of concrete, its aesthetic qualities and appearance are also being researched and examined. The appearance of concrete depends on the type of concrete, the characteristics of the materials, the method of construction, and the curing process. Among the various parameters affecting the aesthetic appearance of concrete during construction, the type of formwork, the type of release agent used, and the curing conditions are significant factors. The main objective of this research is to investigate the parameters of formwork type, curing conditions, and type of release agent on the surface quality of concrete. In this context, various samples were produced using self-compacting concrete with ABS, PVC, untreated wooden, MDF, and metallic formworks, utilizing two types of release agents based on water and petroleum solvents, or with no release agent at all. Two curing conditions were also examined: curing in water and curing in an environment outside water. Different tests, including water absorption, abrasion, Schmidt hammer, and water droplet penetration tests, were conducted. The water droplet test was proposed and examined for a rapid assessment of the aesthetic quality of concrete. Test results show ABS and PVC samples perform well under various conditions. ABS with solvent-based mold oil resists water absorption, while PVC with water-based oil shows good impact resistance. ABS with water-based oil excels in compressive strength. Samples without mold oil have better surface quality. Non-water-cured samples offer superior aesthetics, while water-cured ones have enhanced physical properties due to higher density. Material choice and manufacturing conditions significantly impact product quality, aiding production optimization. 

کلیدواژه‌ها [English]

  • Self-compacting concrete
  • Type of mold
  • Type of mold oil
  • Concrete processing conditions
  • Physical characteristics of concrete
[1] Armstrong KO, Kamath D, Zhao X, Rencheck ML, Tekinalp H, Korey M, Hun D, Ozcan S. Life cycle cost, energy, and carbon emissions of molds for precast concrete: Exploring the impacts of material choices and additive manufacturing. Resources, Conservation and Recycling. 2023 Oct 1; 197: 107117. doi: 10.1016/j.resconrec.2023.107117
[2] Djelal C, Vanhove Y, Magnin A. Tribological behaviour of self compacting concrete. Cement and concrete research. 2004 May 1; 34(5): 821-828. doi: 10.1016/j.cemconres.2003.09.013
[3] S Shokrzadeh MR, Nateghi-Alahi F, Mansoori MR, Javadi P. The improvement of the threaded-based mechanical splice by modifying the threaded system: Study of techniques cold rolling and rotating friction welding. Journal of Building Engineering. 2023 Dec 1; 80: 107964. doi: 10.1016/j.jobe.2023.107964
[4] Stohl L, Manninger T, von Werder J, Dehn F, Gorbushina A, Meng B. Bioreceptivity of concrete: A review. Journal of Building Engineering. 2023 Jul 7: 107201. doi: 10.1016/j.jobe.2023.107201
[5] Sitnikov V. Ice formwork for high-performance concrete: A model of lean production for prefabricated concrete industry. InStructures 2019 Apr 1; 18: 109-116. doi: 10.1016/j.istruc.2018.11.004
[6] Copenhaver K, Smith T, Armstrong K, Kamath D, Rencheck M, Bhagia S, Korey M, Lamm M, Ozcan S. Recyclability of additively manufactured bio-based composites. Composites Part B: Engineering. 2023 Apr 15; 255: 110617. doi: 10.1016/j.compositesb.2023.110617
[7] Shokrzadeh MR, Sharifi M, Alahi FN. Seismic Retrofitting of Concrete Beam-Column Connections: Numerical Study FRP Strip and NSM Technique. Journal of Seismology & Earthquake Engineering. 2024 Aug 1; 26(3): 25. doi: 10.48303/jsee.2024.2031006.1099
[8] Shi J, Qian C, Hao Z. Effects of equipment parameters, ambient parameters and concrete surface moisture on the acquisition of fair-faced concrete appearance quality information. Journal of Building Engineering. 2023 Aug 1; 72: 106476. doi: 10.1016/j.jobe.2023.106476
[9] Hawkins WJ, Herrmann M, Ibell TJ, Kromoser B, Michaelski A, Orr JJ, Pedreschi R, Pronk A, Schipper HR, Shepherd P, Veenendaal D. Flexible formwork technologies–a state of the art review. Structural Concrete. 2016 Dec; 17(6): 911-935. doi: 10.1002/suco.201600117
[10] Libessart L, Djelal C, de Caro P, Laiymani I. Comparative study of the tribological behaviour of emulsions and demoulding oils at the concrete/formwork interface. Construction and Building Materials. 2020 Apr 10; 239: 117826. doi: 10.1016/j.conbuildmat.2019.117826
[11] Pan Y, Zhang Y, Zhang D, Yang H. Effect of polymer and conventional molds on the aesthetical surface quality of concretes. Construction and Building Materials. 2021 Oct 4; 302: 124375. doi: 10.1016/j.conbuildmat.2021.124375
[12] Popescu M, Reiter L, Liew A, Van Mele T, Flatt RJ, Block P. Building in concrete with an ultra-lightweight knitted stay-in-place formwork: prototype of a concrete shell bridge. InStructures 2018 Jun 1; 14: 322-332. doi: 10.1016/j.istruc.2018.03.001
[13] Shi J, Liu B, Zhou F, Shen S, Dai J, Ji R, Tan J. Heat damage of concrete surfaces under steam curing and improvement measures. Construction and Building Materials. 2020 Aug 20; 252: 119104. doi: 10.1016/j.conbuildmat.2020.119104
[14] Coniglio N, Spitz N, El Mansori M. Designing metallic surfaces in contact with hardening fresh concrete: A review. Construction and Building Materials. 2020 Sep 20; 255: 119384. doi: 10.1016/j.conbuildmat.2020.119384
[15] Hosseini P, Kaveh A, Naghian A. Development and optimization of self-compacting concrete mixes: Insights from artificial neural networks and computational approaches. Int. J. Optim. Civil Eng. 2023 Oct 10; 13(4): 457-476. doi: 10.22068/ijoce.2023.13.4.566
[16] Kaveh A. The Use of Artificial Neural Networks and Metaheuristic Algorithms to Optimize the Compressive Strength of Concrete. InApplications of Artificial Neural Networks and Machine Learning in Civil Engineering 2024 Jul 30; 75-83. doi: 10.1007/978-3-031-66051-1_3
[17] Hosseini P, Kaveh A, Naghian A, Abedi A. Eco-friendly building solutions: integrating mahallat's travertine sludge in concrete production. Int. J. Optim. Civil Eng. 2024 Feb 10; 14(2): 229-252. doi: 10.22068/ijoce.2024.14.2.584
[18] Ghaib MA, Górski J. Mechanical properties of concrete cast in fabric formworks. Cement and concrete research. 2001 Oct 1; 31(10): 1459-1465. doi: 10.1016/S0008-8846(01)00568-3
[19] Savukaitis G, Daukšys M, Juočiūnas S, Grinys A, Kriptavičius D. The influence of new and used formwork coated with different release agents on the appearance of the formed concrete surface. Journal of building engineering. 2021 Oct 1; 42: 102807. doi: 10.1016/j.jobe.2021.102807
[20] Libessart L, De Caro P, Djelal C, Dubois I. Correlation between adhesion energy of release agents on the formwork and demoulding performances. Construction and Building Materials. 2015 Feb 1; 76: 130-139. doi: 10.1016/j.conbuildmat.2014.11.061
[21] Chen Y, Koh JL, Tian X, Goh YQ, Dritsas S. Form-finding with robotics: Rapid and flexible fabrication of glass fiber reinforced concrete panels using thermoformed molds. Journal of Computational Design and Engineering. 2019 Jul 1; 6(3): 398-403. doi: 10.1016/j.jcde.2018.10.002
[22] Savukaitis G, Daukšys M, Juočiūnas S, Grinys A, Kriptavičius D. The influence of new and used formwork coated with different release agents on the appearance of the formed concrete surface. Journal of building engineering. 2021 Oct 1; 42: 102807. doi: 10.1016/j.jobe.2021.102807
[23] Abbas A, Zhang C, Hu G, Hussain S, Gao R, Li J, Xu S. Facile formulation of sustainable and stable oil-in-dispersion emulsion: A release agent with high demoulding efficacy. Chemical Engineering Journal Advances. 2022 Nov 15; 12: 100394. doi 10.1016/j.ceja.2022.100394
[24] Abbas A, Zhang C, Hussain S, Tang Y, Li Y, Gao R, Xu S. Preparation of ultrastable oil-in-water emulsion as a robust superwettable and sustainable concrete release agent. Journal of Molecular Liquids. 2023 Nov 15; 390: 123043. doi: 10.1016/j.molliq.2023.123043
[25] Song H, Tang M, Lei X, Di Z, Cheng F. Preparation of environment-friendly ultrafine fly ash based superhydrophobic demoulding coating. Applied Surface Science. 2021 Nov 15; 566: 150688. doi: 10.1016/j.apsusc.2021.150688
[26] Libessart L, Djelal C, de Caro P. Influence of the type of release oil on steel formwork corrosion and facing aesthetics. Construction and Building Materials. 2014 Oct 15; 68: 391-401. doi: 10.1016/j.conbuildmat.2014.06.065
[27] Kothandaraman S, Kandasamy S. The effect of controlled permeable formwork (CPF) liner on the surface quality of concretes. Cement and Concrete Composites. 2017 Feb 1; 76: 48-56. doi: 10.1016/j.cemconcomp.2016.11.012
[28] Megid WA, Khayat KH. Variations in surface quality of self-consolidation and highly workable concretes with formwork material. Construction and Building Materials. 2020 Mar 30; 238: 117638. doi: 10.1016/j.conbuildmat.2019.117638
[29] Vanhove Y, Djelal C. Influence of the formwork removal by polarization on the facing aesthetics in reinforced concrete. Construction and Building Materials. 2021 May 17; 284: 122841. doi: 10.1016/j.conbuildmat.2021.122841
[30] Bruno R, Carpino C, Bevilacqua P, Settino J, Arcuri N. A novel Stay–In–Place formwork for vertical walls in residential nZEB developed for the Mediterranean climate: hygrothermal, energy, comfort and economic analyses. Journal of Building Engineering. 2022 Jan 1; 45: 103593. doi: 10.1016/j.jobe.2021.103593
[31] Gappmaier P, Reichenbach S, Kromoser B. Advances in formwork automation, structure and materials in concrete construction. Automation in Construction. 2024 Jun 1; 162: 105373. doi: 10.1016/j.autcon.2024.105373
[32] IS 13801. Checkered cement concrete tiles. Indian Standard Chequered cement concrete tiles- specification (First Revision). 2013.
[33] B.S 1881: Part 116. Method for Determination of Compressive Strength of Concrete Cubes. British Standards Institution. 1983.
[34] IS:1237. Cement concrete flooring tiles - specification. Bureau of Indian Standards. New Delhi,India. 2012.
[35] BS 1881: Part 122: Testing concrete-Method for determination of water absorption. British Standard. 2009.
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