بررسی اثر سرباره مس و هالوزیت بر دوام ملات قلیا فعال سرباره ای خودحسگر با روش تاگوچی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی عمران، دانشگاه تربیت دبیر شهید رجایی، تهران، ایران

2 دانشکده مهندسی عمران، دانشگاه تربیت دبیر شهید رجایی، تهران

10.22124/jcr.2025.29716.1692

چکیده

چکیده :

هدف از این مقاله ارائه رویکردی نوآورانه در طراحی مواد قلیا فعال سرباره ای خودحسگر پایدار، برای کاربرد در شرایط تهاجمی سولفاتی می باشد که پتانسیل آن را برای پایش سلامت سازه ها از طریق سنجش رسانایی الکتریکی بررسی می کند. در این تحقیق از روش طراحی آزمایش های تاگوچی به منظور بررسی سیستماتیک تاثیر پارامترهای کلیدی بر مقاومت فشاری و رسانایی الکتریکی ملات ژئوپلیمری حاوی مواد خودحسگر نظیر هالوزیت و سرباره مس استفاده شد. آزمایش های انجام شده شامل سنجش مقاومت فشاری، رسانایی الکتریکی و بررسی ریزساختار با استفاده از میکروسکوپ الکترونی بود. نتایج نشان داد افزایش مولاریته سدیم هیدروکسید، تاثیر مثبت بر میزان رسانایی ملات ژئوپلیمری دارد. همچنین افزودن پرکننده‌های رسانا جایگزین سرباره فولاد، عملکرد بهتری داشت و گسترش تبلور با کیفیت بالاتری ادامه یافت. افزایش سرباره فولاد و پرکننده ها، منجر به افزایش متناسب در محتوای کلسیم شد و تشکیل ژل C-A-S-H و C-S-H را در ریزساختار توسعه داد. این پدیده با کاهش تخلخل همراه شد و در نهایت به یکپارچگی بیشتر ریز ساختار منجر گردید. این ویژگی ها، نقش امیدوارکننده مواد قلیایی فعال سرباره ای خودحسگر را به گزینه ای ایده آل برای ساخت وسازهای پایدار و هوشمند تبدیل میکند و می توانند جایگزینی پیشرفته برای حسگرهای سنتی در محیط های مختلف قلمداد شوند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigating the effect of copper slag and halloysite on the durability of self-sensing alkali-activated slag mortar using the Taguchi method

نویسندگان [English]

  • Navid Jalali Jalal Abadi 1
  • Amir Tarighat 1
  • Abolfazl Soltani 2
1 Faculty of Civil Engineering, Shahid Rajaee Teacher Training Unversity,, Tehran, Iran
2 Faculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran
چکیده [English]

Abstract:

Alkali-activated slag-based materials are a type of stable and environmentally compatible substance that, due to their alkaline nature, inherently exhibit higher electrical conductivity than Portland cement. Given their favorable sensory and mechanical properties, they can be utilized for structural health monitoring and measuring the physical parameters of structures under diverse environmental conditions. Structures in destructive/aggressive environments such as seawater, dams, bridge foundations, water supply tunnels, and other hydraulic infrastructures are exposed to risks due to chloride ions, microorganisms, and sulfate attacks. Therefore, investigating the durability of self-sensing alkali-activated slag-based mortar in such aggressive environments is essential. This study employs the Taguchi method to evaluate the effects of various parameters on the compressive strength and conductivity of geopolymer mortar containing conductive fillers like halloysite and copper slag, immersed in a sulfate-rich environment. The conducted analyses and tests include XRF, XRD, compressive strength, conductivity measurements, and SEM studies. Results revealed that the mix design of T3-C5-H15-M12-A55 showed the highest conductivity in the sulfate environment, and increasing sodium hydroxide molarity positively influenced the geopolymer mortar’s conductivity. Additionally, substituting steel slag with conductive fillers demonstrated superior performance, with higher-quality crystallization development. Increased steel slag and filler content proportionally elevated calcium levels, promoting the formation of C-A-S-H and C-S-H gels, which reduced porosity and enhanced microstructural integrity.

کلیدواژه‌ها [English]

  • Self-sensing geopolymer mortar
  • Taguchi
  • durability
  • conductivity
  • compressive strength

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