تاثیر شرایط اولیه خاک و محیط گیرش بر مقاومت کششی خاک ماسه ‏ای بهسازی شده با صمغ فارسی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده عمران، دانشگاه علم وصنعت ایران، تهران، ایران

2 دانشکده عمران،دانشگاه علم و صنعت ایران، تهران، ایران

چکیده

مقاومت کششی مناسب یکی از پارامتر‌های مهم در خاک‌های معرض تنش کششی به‌شمار می‏آید. در سالیان اخیر برای کنترل ترک و افزایش قابلیت کششی خاک از مواد بایوپلیمری استفاده وسیعی صورت گرفته است. در این مطالعه آزمایشگاهی قابلیت کششی ماسه بهسازی‏شده با صمغ فارسی مورد بررسی قرار گرفته‏است. بدین منظور تاثیر پارامتر‌های تراکم اولیه خاک، شیوه اختلاط مواد با یکدیگر، دما و رطوبت محل گیرش و زمان گیرش بر مقاومت کششی نمونه‏های بهسازی‏شده توسط آزمایش کشش غیر‏مستقیم ارزیابی گردید. پس از بررسی نتایج مشخص گردید که اضافه کردن محلول یکنواخت صمغ-آب (شامل 2% وزنی صمغ و 16% وزنی آب نسبت به وزن خاک خشک) به خاک خشک بهترین شیوه اختلاطی و تراکم اولیه نسبی 50% برای خاک، تراکم بهینه برای کسب بیشترین مقاومت کششی بوده است. همچنین ارتباط مستقیمی بین افزایش دما و کاهش رطوبت با افزایش مقاومت کششی برقرار است به طوری که با افزایش دمای محل گیرش از 25 درجه در اتاق به 50 درجه در گرمکن و کاهش رطوبت نسبی محیط گیرش از هفتاد به پانزده و سپس به صفر درصد، مقاومت کششی حداکثر به ترتیب از 154 به 270 و 442 کیلوپاسکال افزایش پیدا می‏کند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of initial soil and curing conditions on tensile strength of sandy soil treated with Persian gum

نویسندگان [English]

  • Masoud Mohseninia 1
  • Hossein Salehzadeh 2
1 Civil Department, Iran university of science and technology, Tehran, Iran
2 Civil department, Iran university of science and technology, Tehran, Iran
چکیده [English]

Suitable tensile strength is one of the important parameters in soils subjected to tensile stress. In recent years, biopolymer materials have been widely used to control cracking and increase the tensile strength of soil. In this laboratory study, the tensile strength of sand treated with Persian gum was investigated. For this purpose, the effect of parameters of initial relative dry density of soil, materials mixing method, temperature and humidity of curing place and curing time on the tensile strength of treated samples was evaluated by indirect tensile test. After examining the results, it was found that adding a uniform gum-water solution (including 2% gum and 16% water related to the weight of dry soil) to the dry soil was the best mixing method and the initial relative density of 50% for the soil was the optimal density to obtain the highest tensile strength. Also, there is a direct relationship between the increase in temperature and the decrease in humidity with the increase in tensile strength, so that when the temperature increases from 25 degrees in the room to 50 degrees in an oven and the relative curing humidity environment decreases from seventy to fifteen and then to zero percent, the maximum tensile strength of treated samples increases from 154 to 270 and 442 kPa respectively.

کلیدواژه‌ها [English]

  • Tensile strength
  • Firoozkooh sand
  • Soil improvement
  • Biopolymer
  • Persian gum

مراجع

Bordoloi, S., Sekharan, S. and Garg, A. 2017. “A review of physio-biochemical properties of natural fibers and their application in soil reinforcement”. Adv. Civ. Eng. Mater., 6(1): 323-359.
Causarano, H. 1993. “Factors affecting the tensile strength of soil aggregates”. Soil Till. Res., 28(1): 15-25.
Chang, I., Im, J., Prasidhi, A. K. and Cho, G. C. 2015. “Effects of Xanthan gum biopolymer on soil strengthening”. Constr. Build. Mater., 74: 65-72.
Chauhan, M. S., Mittal, S. and Mohanty, B. 2008. “Performance evaluation of silty sand subgrade reinforced with fly ash and fibre”. Geotext. Geomembranes, 26(5): 429-435.
Chen, C., Peng, Z., Gu, J., Peng, Y., Huang, X. and Wu, L. 2020. “Exploring environmentally friendly biopolymer material effect on soil tensile and compressive behavior”. Int. J. Environ. Res. Public Health, 17(23): 9032.
Consoli, N. C., da Fonseca, A. V., Cruz, R. C. and Silva, S. R. 2011. “Voids/cement ratio controlling tensile strength of cement-treated soils”. J. Geotech. Geoenviron. Eng., 137(11): 1126-1131.
Dabestani, M., Kadkhodaee, R., Phillips, G. O. and Abbasi, S. 2018. “Persian gum: A comprehensive review on its physicochemical and functional properties”. Food Hydrocolloids, 78: 92-99.
Divya, P., Viswanadham, B. and Gourc, J. 2014. “Evaluation of tensile strength-strain characteristics of fiber-reinforced soil through laboratory tests”. J. Mater. Civ. Eng., 26(1): 14-23.
Fagone, M., Loccarini, F. and Ranocchiai, G. 2017. “Strength evaluation of jute fabric for the reinforcement of rammed earth structures”. Compos. Part B: Eng., 113: 1-13.
Fatehi, H., Ong, D. E., Yu, J. and Chang, I. 2021. “Biopolymers as green binders for soil improvement in geotechnical applications: A review”. Geosci., 11(7): 291.
Gao, L., Hu, G., Xu, N., Fu, J., Xiang, C. and Yang, C. 2015. “Experimental study on unconfined compressive strength of basalt fiber reinforced clay soil”. Adv. Mater. Sci. Eng., 2015.
Ghasemzadeh, H. and Modiri, F. 2020. “Application of novel Persian gum hydrocolloid in soil stabilization”. Carbohydrate Polym., 246: 116639.
Ghasemzadeh, H., Mehrpajouh, A. and Pishvaei, M. 2022. “Compressive strength of acrylic polymer-stabilized kaolinite clay modified with different additives”. ACS Omega, 7(23): 19204-19215.
Gilazghi, S. T., Huang, J., Rezaeimalek, S. and Bin-Shafique, S. 2016. “Stabilizing sulfate-rich high plasticity clay with moisture activated polymerization”. Eng. Geol., 211: 171-178.
He, S., Bai, H. and Xu, Z. 2018. “Evaluation on tensile behavior characteristics of undisturbed loess”. Energies, 11(8): 1974.
Javadian, A., Wielopolski, M., Smith, I. F. and Hebel, D. E. 2016. “Bond-behavior study of newly developed bamboo-composite reinforcement in concrete”. Constr. Build. Mater., 122: 110-117.
Kar, A., Das, M. R. and Mohapatra, D. 2022. “An experimental study on use of biopolymer for sustainable stabilization of slopes”. Mater. Today: Proc., 62: 6148-6152.
Khodaei, D., Oltrogge, K. and Hamidi-Esfahani, Z. 2020. “Preparation and characterization of blended edible films manufactured using gelatin, tragacanth gum and Persian gum”. Lwt., 117: 108617.
Lee, S. and Chang, I. 2019. “Microscopic investigation of interparticle-interaction between sand particles and biopolymer”. 13th Australia New Zealand Conference on Geomechanics, Acosta-Martinez and Lehane (Eds.), Australian Geomechanics Society, Sydney, Australia.
Mohseninia, M. and Salehzadeh, H. 2023. “Enhancing strength parameters of Firouzkooh sandy soil improved with Persian herbal gum”. Amirkabir J. Civ. Eng., 55(6): 1-4.
Rezaeimalek, S., Huang, J. and Bin-Shafique, S. 2017. “Evaluation of curing method and mix design of a moisture activated polymer for sand stabilization”. Constr. Build. Mater., 146: 210-220.
Seo, S., Lee, M., Im, J., Kwon, Y. M., Chung, M. K., Cho, G. C. and Chang, I. 2021. “Site application of biopolymer-based soil treatment (BPST) for slope surface protection: In-situ wet-spraying method and strengthening effect verification”. Constr. Build. Mater., 307: 124983.
Tang, C. S., Pei, X. J., Wang, D. Y., Shi, B. and Li, J. 2015. “Tensile strength of compacted clayey soil”. J. Geotech. Geoenviron. Eng., 141(4): 04014122.
Turner, L. K. and Collins, F. G. 2013. “Carbon dioxide equivalent (CO2-e) emissions: A comparison between geopolymer and OPC cement concrete”. Constr. Build. Mater., 43: 125-130.
Wu, J. T. H., Pham, T. Q. and Adams, M. T. 2013. “Composite behavior of geosynthetic reinforced soil mass”. Tech. Report, University of Colorado at Denver, Dept. of Civil Engineering, https://rosap.ntl.bts.gov/view/ dot/35838/dot_35838_DS1.pdf
Zhang, J., Meng, Z., Jiang, T., Wang, S., Zhao, J. and Zhao, X. 2022. “Experimental study on the shear strength of silt treated by Xanthan gum during the wetting process”. Appl. Sci., 12(12): 6053.
Ziegler, S., Leshchinsky, D., Ling, H. I. and Perry, E. B. 1998. “Effect of short polymeric fibers on crack development in clays”. Soils Found., 38(1): 247-253.

فایل ها

سابقه مقاله

  • تاریخ دریافت: 16 تیر 1402
  • تاریخ بازنگری: 01 شهریور 1402
  • تاریخ پذیرش: 14 شهریور 1402

هم رسانی

ارجاع به این مقاله

آمار