بهبود پارامترهای مکانیکی بتن حاصل از سیمان پوزولانی جهت استفاده در پروژه-های آبیاری و زهکشی

نوع مقاله : علمی - پژوهشی

نویسندگان

1 گروه ژئوتکنیک، دانشکده عمران، دانشگاه تبریز، تبریز، ایران

2 هیئت علمی دانشگاه پیام نور

3 دانشجوی دکترای ژئوتکنیک، دانشکده مهندسی عمران، دانشگاه ارومیه.

چکیده

در بین بخشهای مختلف صنعت عمران، سازههای آبی (مانند سد، سرریزها و اجزای جانبی همچون رویه کانال) یکی از بزرگترین مصرف کنندگان سیمان به شمار میروند. گزارش‌های میدانی نشان می‌دهند که بتن ساخته شده از سیمان پوزولانی اردبیل فاقد مشخصه‌های مکانیکی مورد نیاز در پروژه‌های آبی بوده و نیاز به انجام یک پژوهش جامع در این زمینه ضروری به نظر می‌رسد. هدف از این پژوهش بررسی چگونگی و امکانسنجی جایگزینی سیمان پوزولانی اردبیل به جای سیمان تیپ 2 صوفیان از دیدگاه مقاومت فشاری در پروژههای آبیاری و زهکشی است. روش انجام این پژوهش به صورت آزمایشگاهی و انجام آزمایش‌های مقاومت فشاری استاندارد بر روی نمونه‌های بتن پایه و نمونه‌های بهسازی شده است. آزمایش بر روی نمونههای شاهد نشان می‌دهد که امکان استفاده از سیمان پوزولانی اردبیل به تنهایی در پروژههای بتنریزی سازهای امکانپذیر نمیباشد و برای نیل به این هدف اندیشیدن تمهیداتی بایسته است. بدین منظور در این پژوهش از چهار ماده افزودنی پودر سنگ، نرمه ماسه، میکروسیلیس و خاکستر بادی به عنوان جایگزین سیمان استفاده شده است. نتایج آزمایشها نشان میدهد که خاکستر بادی در دراز مدت مقاومت فشاری بتن را افزایش داده و در روزهای نخست مقاومت فشاری را کاهش میدهد. میکروسیلیس برای درصدهای پایین جایگزینی منجر به کاهش و برای درصدهای بیشتر منجر به افزایش مقاومت فشاری می‌گردد. نرمه ماسه اندکی مقاومت فشاری بتن را کاهش داده و در نهایت جایگزینی پودر سنگ در دراز مدت منجر به بهبود مقاومت فشاری بتن می‌گردد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Improvement of mechanical parameters of concrete yielded from pozzolanic cement for irrigation and drainage projects

نویسندگان [English]

  • mahzad esmaeili falak 1
  • amin lotfi eghlim 2
  • samira nematzadeh 3
1 Geotechnical engineering , Faculty of Civil engineering, University of Tabriz, Tabriz, Iran
2 science Committee of payam e nour university
3 Faculty of Civil engineering, University of Urmia, Urmia, Iran
چکیده [English]

Among various active parts of construction industry, irrigation and drainage projects (such as dams, spillways and peripheral parts such as canals) are one of the biggest consumers of cement. Various empirical reports show that the concrete made of Ardabil’s pozzolanic cement does not meet the requirement for irrigation and drainage projects in case of mechanical characteristics which signifies the importance of further research in this area. The objective of this study is to investigate the suitability of replacing Ardabil’s pozzolanic cement with type 2 Soufian cement from the viewpoint of compression strenght at irrigation and drainage projecta. This study focuses on experimental methods by performing standard compression strength tests on base and improved speimens. The initial results showed that solely utilization of Ardabil’s pozzolanic cement in structural parts is not feasible and there should be some other approaches to reach this end. In this regard, 4 additive materials were used instead of cement including: stone powder, fined part of sand, silica fume and fly ash. The results indicated that utilization of fly ash increases the compressive strength of the cement in long term application; however, it causes a reduction in compressive strength in short term application. Furthermore, replacemet of silica fume in lower percentages causes a reduction in compression strength; however, higher percentage of silica fume replacement increases compression strength. The finer parts of the sand slightly decreased the compression strength and the replacement of stone powder yields to an increase in long term compression strength.

کلیدواژه‌ها [English]

  • Ardabil’s pozzolanic cement
  • Sofian’s type 2 cement
  • Fly ash
  • Silica fume
  • Stone powder
[1] Mousavi, N. )2011(. Factors affecting the strength and durability of concrete. Concrete technology magazine, 45, 1-6 (in
Persian).
[2] Silva, E. J. N. L., Carvalho, N. K., Prado, M. C., Zanon, M., Senna, P. M., Souza, E. M., & De-Deus, G. (2016). Pushout
Bond Strength of Injectable Pozzolan-based Root Canal Sealer. Journal of endodontics, 42(11), 1656-1659.
[3] Yazdan Doust, M. and Yazdani, M. (2014). Experimental Study on Combined effects of microsilica weighted ratio
content, fineness modulus of aggregates and water-cement ratio on mechanical and physical properties of concrete.
Modares Civil Engineering Journal. 14 (52):183-195 (in Persian).
[4] Perry, C. and Gillott, J. E. (1995) .The influence of silica fume on the strength of the cement-aggregate bond. Special
Publication. 156, 191-212.
[5] Neville, A. (1997). Aggregate bond and modulus of elasticity of concrete. Materials Journal. 94(1), 71-74.
[6] Soriano, L., Monzó, J., Bonilla, M., Tashima, M. M., Payá, J., & Borrachero, M. V. (2013). Effect of pozzolans on the
hydration process of Portland cement cured at low temperatures. Cement and Concrete Composites, 42, 41-48.
[7] Moon, J., Bae, S., Celik, K., Yoon, S., Kim, K. H., Kim, K. S., & Monteiro, P. J. (2014). Characterization of natural
pozzolan-based geopolymeric binders. Cement and Concrete Composites, 53, 97-104.
[8] Grist, E. R., Paine, K. A., Heath, A., Norman, J., & Pinder, H. (2015). Structural and durability properties of hydraulic
lime–pozzolan concretes. Cement and Concrete Composites, 62, 212-223.
[9] Robayo-Salazar, R. A., Mejia, R. and Puertas, F. 2016. Effect of metakaolin on natural volcanic pozzolan-based
geopolymer cement. Applied Clay Science. 132, 491-497.
[10] Hossain, M. M., Karim, M. R., Hasan, M., Hossain, M. K., & Zain, M. F. M. (2016). Durability of mortar and concrete
made up of pozzolans as a partial replacement of cement: A review. Construction and Building Materials, 116, 128-140.
[11] Scrivener, K. L., Bentur, A. and Pratt P. L. (1988). Quantitative characterization of the transition zone in high strength
concretes. Advances in Cement Research, 1(4), 230-237.
[12] Mazloum, M. RamazanianPour, A. (2015). Strong concrete and its application. Tehran: Shahid Rajaee Teacher
Training University Press (in Persian).
[13] Detwiler, R. J., Bhatty J. I. and Battacharja, S. (1996). Supplementary cementing materials for use in blended cements.
No. R&D Bulletin RD112T.
[14] Kjellsen, K. O., Wallevik, O. H. and Hallgren, M. (1999). On the compressive strength development of highperformance
concrete and paste—effect of silica fume. Materials and Structures. 32(1), 63-69.
[15] Baldino, N., Gabriele, D., Lupi, F. R., Seta, L., & Zinno, R. (2014). Rheological behaviour of fresh cement pastes:
Influence of synthetic zeolites, limestone and silica fume. Cement and Concrete Research, 63, 38-45.
[16] Rossen, J. E., Lothenbach. B. and Scrivener, K. L. (2015). Composition of C–S–H in pastes with increasing levels of
silica fume addition. Cement and Concrete Research. 75, 14-22
[1] Mousavi, N. )2011(. Factors affecting the strength and durability of concrete. Concrete technology magazine, 45, 1-6 (in
Persian).
[2] Silva, E. J. N. L., Carvalho, N. K., Prado, M. C., Zanon, M., Senna, P. M., Souza, E. M., & De-Deus, G. (2016). Pushout
Bond Strength of Injectable Pozzolan-based Root Canal Sealer. Journal of endodontics, 42(11), 1656-1659.
[3] Yazdan Doust, M. and Yazdani, M. (2014). Experimental Study on Combined effects of microsilica weighted ratio
content, fineness modulus of aggregates and water-cement ratio on mechanical and physical properties of concrete.
Modares Civil Engineering Journal. 14 (52):183-195 (in Persian).
[4] Perry, C. and Gillott, J. E. (1995) .The influence of silica fume on the strength of the cement-aggregate bond. Special
Publication. 156, 191-212.
[5] Neville, A. (1997). Aggregate bond and modulus of elasticity of concrete. Materials Journal. 94(1), 71-74.
[6] Soriano, L., Monzó, J., Bonilla, M., Tashima, M. M., Payá, J., & Borrachero, M. V. (2013). Effect of pozzolans on the
hydration process of Portland cement cured at low temperatures. Cement and Concrete Composites, 42, 41-48.
[7] Moon, J., Bae, S., Celik, K., Yoon, S., Kim, K. H., Kim, K. S., & Monteiro, P. J. (2014). Characterization of natural
pozzolan-based geopolymeric binders. Cement and Concrete Composites, 53, 97-104.
[8] Grist, E. R., Paine, K. A., Heath, A., Norman, J., & Pinder, H. (2015). Structural and durability properties of hydraulic
lime–pozzolan concretes. Cement and Concrete Composites, 62, 212-223.
[9] Robayo-Salazar, R. A., Mejia, R. and Puertas, F. 2016. Effect of metakaolin on natural volcanic pozzolan-based
geopolymer cement. Applied Clay Science. 132, 491-497.
[10] Hossain, M. M., Karim, M. R., Hasan, M., Hossain, M. K., & Zain, M. F. M. (2016). Durability of mortar and concrete
made up of pozzolans as a partial replacement of cement: A review. Construction and Building Materials, 116, 128-140.
[11] Scrivener, K. L., Bentur, A. and Pratt P. L. (1988). Quantitative characterization of the transition zone in high strength
concretes. Advances in Cement Research, 1(4), 230-237.
[12] Mazloum, M. RamazanianPour, A. (2015). Strong concrete and its application. Tehran: Shahid Rajaee Teacher
Training University Press (in Persian).
[13] Detwiler, R. J., Bhatty J. I. and Battacharja, S. (1996). Supplementary cementing materials for use in blended cements.
No. R&D Bulletin RD112T.
[14] Kjellsen, K. O., Wallevik, O. H. and Hallgren, M. (1999). On the compressive strength development of highperformance
concrete and paste—effect of silica fume. Materials and Structures. 32(1), 63-69.
[15] Baldino, N., Gabriele, D., Lupi, F. R., Seta, L., & Zinno, R. (2014). Rheological behaviour of fresh cement pastes:
Influence of synthetic zeolites, limestone and silica fume. Cement and Concrete Research, 63, 38-45.
[16] Rossen, J. E., Lothenbach. B. and Scrivener, K. L. (2015). Composition of C–S–H in pastes with increasing levels of
silica fume addition. Cement and Concrete Research. 75, 14-22