اعتبار،چابکی،پاسخگویی

ارزیابی تاثیر خاکستر بادی و دوده سیلیسی بر روی اسلامپ و حفظ روانی بتن خود متراکم دیواره دیافراگمی اسکله شهید رجایی بندرعباس

نوع مقاله : مقاله پژوهشی

نویسنده

کارشناسی ارشد عمران مهندسی مدیریت ساخت

چکیده
با هدف دستیابی همزمان به کارایی مناسب، مقاومت و تراکم بالا و عدم حصول این موارد در بتن معمولی، استفاده از بتن خودمتراکم (SCC) برای دیواره‌های دیافراگمی مجتمع طرح توسعه بندری شهید رجایی اجتناب‌ناپذیر و داشتن این خصوصیات سه‌گانه، در بتن تازه و بتن سخت‌شده، برای اجرای دیواره اصلی T شکل این پروژه حیاتی بود، بدین منظور اثر پوزولان های خاکستربادی و دوده‌سیلیسی بر روی بتن خود متراکم جهت کسب کارایی بالا و حفظ روانی آن حداکثر تا 6 ساعت و مقاومت فشاری 28 روزه طرح (حداقل 450 کیلوگرم بر سانتیمتر مربع) با تهیه 8 طرح اختلاط مورد بررسی قرار گرفت. دراین راستا برای روانی بتن از آزمایش رایج جریان اسلامپ طبق ASTM C143 استفاده شد. این آزمایش در 7 مرتبه تکرار و اسلامپ اولیه در زمان تولید هر طرح اختلاط اندازه گیری و سپس در فواصل یک ساعتی تا زمان حفظ کارایی و نهایتاً تا 6 ساعت انجام گرفت. و برای مقاومت فشاری بر اساس BS 1881 و ASTM C31 برای هر طرح 4 نمونه مکعبی 15*15*15 سانتیمتر نمونه برداری و در نهایت نتایج نشان داد که مقاومت فشاری 28 روزه و اسلامپ تمامی طرح های با ۲۴ درصد خاکستربادی در مقایسه با طرح های دارای ۵ تا 7.5 درصد دوده سیلیسی بهتر عمل نموده و در بین آنها طرح B با ۱۳ درصد افزایش مقاومت و ۵۰ درصد روانی و حفظ اسلامپ (که اهمیت خاصی در پروژه داشت) بهترین نتیجه را کسب نمود و تطابق خوبی با شرایط کاری جهت اجرای بتن ریزی دیواره دیافراگمی اسکله شهید رجایی داشته است.

کلیدواژه‌ها

موضوعات

عنوان مقاله English

Evaluation of the Effect of Fly Ash and Silica Fume on Slump and Workability Retention of Self-Compacting Concrete for the Diaphragm Wall of Shahid Rajaee Port in Bandar Abbas

نویسنده English

Seyed Majdaldin Hoseini
Master's in Civil Engineering Construction Management
چکیده English

With the aim of simultaneously achieving proper performance, high strength and high density in conventional concrete, the use of self-compacting concrete (SCC) was inevitable for the diaphragm walls of the second phase of the Shahid Rajaee Port Development Project.These three characteristics, both in fresh and hardened concrete, were crucial for the implementation of the main T-shaped wall of this project. For this purpose, the effect of fly ash and silica fume pozzolans on self-compacting concrete to achieve high performance and maintain its fluidity for a maximum of 6 hours and the 28-day compressive strength of the design (at least 450 kg/cm2) was investigated by preparing 8 mixing plans. For assessing the concrete’s flowability, the standard slump flow test according to ASTM C143 was employed. This test was repeated 7 times, with initial slump measurements taken at the time of production for each mix design, and subsequently at hourly intervals to monitor workability retention, up to a maximum of 6 hours. For compressive strength, four 15x15x15 cm cubic specimens were prepared for each mix design based on BS 1881 and ASTM C31. The results ultimately indicated that all mix designs incorporating 24% fly ash performed better in terms of 28-day compressive strength and slump compared to designs containing 5% to 7.5% silica fume. Among these, Mix Design B achieved the best results with a 13% increase in strength and 50% improvement in workability and slump retention (which was of particular importance to the project), demonstrating excellent compatibility with the operational requirements for casting the diaphragm wall of the Shahid Rajaee Port.

کلیدواژه‌ها English

  • Fly ash
  • Silica fume
  • Slump
  • Self-compacting concrete
  • Diaphragm wall
  • Shahid Rajaee Port
American Concrete Institute. (2007). Bylaw, Regulation ACI 237R-07 Self-Consolidating Concrete.
American Society for Testing and Materials. (1990). Standard ASTM: C31/C31m-96.
American Society for Testing and Materials. (1990). Standard ASTM: C143-90a.
Babaei,Y., Mousavi Ghasemi,S.A., & Zandi,Y. (2022). Comparative Evaluation of the Effect of Fly Ash and
Micro-silica on the Growth Trend, Compressive Strength, and Electrical Resistance of Concretes Exposed to
Sulfate Waters. Structural and Construction Engineering, 9(11), 122-139. Persian
Bidast,A. (2014). Effect of Fly Ash on Concrete Durability in Marine Environment. Second International
Congress on Structure-Architecture and Urban Development. Persian
Bo Zhou., & Yuichi Uchida, (2017). Influence of flowability, casting time and formwork geometry on fiber
orientation and mechanical properties of UHPFRC. Cem Concr. Res. pp. 164-177
British Standard. (1983). Standard BS1881: part 116. Method for Determination of compressive strength of
concrete cubes.
De, Schutter,G., Bartos, P,J,M., Domone, P,L., & Gibbs,J. (2008). Self-Compacting Concrete. Whittles
Publishing, Dunbeath, Scotland, UK.
European Federation of National Trade Associations (EFNARC). (2002). Specification and Guidelines for
Self-Compacting Concrete. UK, pp. 32.
Gaikwad, Prathamesh., & Sathe, Sandeep. (2025). Effect of fly ash on compressive strength, carbonation and
corrosion resistance of reinforced concrete: a systematic review. World Journal of Engineering, Vol. 22 No. 1,
pp.40-60
Gautam, Lilesh., Purbe,. Mukesh, Kumar., Sharma., Kul, Vaibhav., et al. (2025). Environmental impact
mitigation and durability enhancement of concrete through fly ash substitution: a comprehensive review. J.Build
Rehabil 10,99
Ghodratnama, M., Rajaee, A., Masoodi, A. R., Abrishami, S., Davarpanah, T. A., & Pournoori, P. (2025).
Enhancing the fracture toughness of eco-friendly self-compacting concrete with waste glass coarse aggregates
and steel fibers: A mixed-mode I/II fracture analysis using SCB specimens. Theoretical and Applied Fracture
Mechanics, .104969
Helmuth, R. (1987). Fly ash in cement and concrete. Portland Cement Association.
I.C, Yeh. (2007). Modeling slump flow of concrete using second-order regressions and artificial neural
networks. Cem. Concr. Compos., 29 (6), pp. 474-480
Ige, O.E., Olanrewaju, O.A., Duffy, K.J., & Collins, O.C. (2022). Environmental Impact Analysis of Portland
Cement (CEM1) Using the Midpoint Method. Energies, 15(7), 2708.
K.L, Lin., W.C, Chang., D.F, Lin., H.L, Luo., & M.C, Tsai. (2008). Effects of nano-SiO2 and different ash
particle sizes on sludge ash. Cement Mortar Journal of Environmental Management, 88, 708–714.
Lecompte,T., & A, Perrot. (2017). Non-linear modeling of yield stress increase due to SCC structural buildup
at rest. Cement and Concrete Research, 92: p. 92-97
Luo, T., Wang, X., & Zhuang, S. (2023). Value-added utilization of steel slag as a hydration heat controlling
material to prepare sustainable and green mass concrete. Case Studies in Construction Materials, 19, e02619.
L,Yang., X, An., & S, Du. (2021). Estimating workability of concrete with different strength grades based on
deep learning. Measurement, 186 , Article 110073
Mazloom, M., Ramezanianpour, A.A., & Brooks, J.J. (2004). Effect of silica fume on mechanical properties
of high-strength concrete. Cement & Concrete Composites, Vol. 26, pp. 347-357.
Mokal, M.P., Mandal, R., Nayak.S, & Panda, S.K. (2023). Efficacy of high-volume fly ash and slag on the
physicomechanical, durability, and analytical characteristics of high-strength mass concrete. Journal of
Building Engineering, 76, 107295.
58 / حسینی، سیدمجدالدین. -72 ،)5(7 ، نشریه عمران و پروژه، 1404
72
Nili, M. (2015). Evaluation of Setting Time and Compressive Strength Development of Concretes Containing
Pozzolanic Materials. Modares Civil Engineering Journal, Vol. 15. Persian
Omer, Brwa., Dilshad, Kakasor., Ismael, Jaf., Sirwan, Khuthur Malla., et al. (2024). Exploring the potential
of soft computing for predicting compressive strength and slump flow diameter in fly ash-modified selfcompacting
concrete. Archiv. Civ.Mech.Eng 24, 95.
Pachideh,G., Gholhaki,M., & Ketabdari, H. (2020). Effect of pozzolanic wastes on mechanical properties,
durability and microstructure of the cementitious mortars. Journal of Building Engineering, 29 101178
Pournoori, P., Davarpanah, TQ.A., Rajaee, A., Ghodratnama, M., Abrishami, S., & Masoodi, A. R. (2024).
Experimental exploration of fracture behavior (pure mode III) in eco-friendly steel fiber-reinforced selfcompacting
concrete with waste tempered glass as coarse aggregates. Scientific Reports, 14(1), .9043
Rahmani,H. (2015). Combined Effect of Nano-silica and Micro-silica on the Durability of High-Strength
Concretes Against Sulfuric Acid Attack. Modares Civil Engineering Journal, Summer. Persian
Shoaei, S., Shoaei, A., & Danandeh Mehr, A. (2024). Prediction of Service Life and Life Cycle Assessment of
Pozzolanic Concretes. Journal of Civil and Environmental Engineering, Vol. 54, No. 227, pp. 29-36. Persian
Shojamoghadam, S., Rajaee, A., & Abrishami, S. (2024). Impact of various additives and their combinations
on the consolidation characteristics of clayey soil. Scientific Reports, 14(1), .31907
Soo-Duck, Hwang., Kamal, H.Khayat., Olivier, Bonneau. (2006). Performance-Based Specifications of Self
Consolidating Concrete Used in Structural Applications. ACI Materials Journal, 2006, 121-129.
Y, Cai., & Q, Liu. (2023). Research progress on the stability of concrete mixtures and its influence on the
durability of engineering structures. J. Xi’an Univ. Arch. Tech., 55 (4), pp. 492-503
Yuxin, Cai., & Qing-feng, Liu. (2022). Numerical investigation on aggregate settlement and its effect on the
durability of hardened concrete. in: Proceedings of the 7th International Conference on Durability of Concrete
Structures, Jinan, China
Yuxin, Cai., & Qing-feng, Liu. (2023). Stability of fresh concrete and its effect on late-age durability of
reinforced concrete: An overview. Elsevier. J. Build. Eng. Article 107701
  • تاریخ دریافت 11 اردیبهشت 1404
  • تاریخ بازنگری 17 خرداد 1404
  • تاریخ پذیرش 26 خرداد 1404
  • تاریخ اولین انتشار 26 خرداد 1404
  • تاریخ انتشار 01 مرداد 1404