تخمین مقاومت فشاری درجای بتن بر اساس ضریب بلوغ بدست آمده از دمای محیط

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی عمران، دانشکده مهندسی، دانشگاه یاسوج، یاسوج، ایران

2 گروه عمران، دانشکده مهندسی عمران و معماری، دانشگاه شهید چمران اهواز، اهواز، ایران.

3 دانشجوی کارشناسی ارشد، گروه عمران، دانشکده مهندسی، دانشگاه صنعتی خاتم الانبیاء (ص) بهبهان، بهبهان، ایران.

4 استادیار، گروه عمران، دانشکده مهندسی، دانشگاه صنعتی خاتم الانبیاء (ص) بهبهان، بهبهان، ایران.

10.22124/jcr.2026.31491.1717

چکیده

ارزیابی غیرمخرب خواص بتن در روزهای اولیه ساخت، برای اطمینان از کسب مقاومت کافی جهت تداوم فرآیند اجرا، امری حیاتی است. روش بلوغ به عنوان ابزاری مؤثر برای تخمین مقاومت فشاری بر پایه دمای هیدراسیون بتن شناخته می‌شود؛ با این حال، نیاز این روش به اندازه‌گیری تاریخچه دمای درون بتن با استفاده از تجهیزات ابزار دقیق، چالشی عملی در محل پروژه ایجاد می‌کند. این پژوهش با هدف ارائه یک روش تقریبی و کاربردی‌تر برای سایت، به بررسی امکان جایگزینی تاریخچه دمای محیط به جای دمای درون بتن در مدل بلوغ پرداخته است. بدین منظور، نتایج حاصل از روش استاندارد بلوغ و روش پیشنهادی مبتنی بر دمای محیط، با یکدیگر مقایسه شدند. ارزیابی‌ها بر روی بتن در سنین کمتر از 28 روز و در دو شرایط محیطی متفاوت (فصل گرم و سرد) انجام پذیرفت. یافته‌های کمی تحقیق نشان داد که حداکثر اختلاف نسبی تخمین مقاومت در روش جدید، در دوره گرم سال، ۵ درصد و در دوره سرد سال، ۱۰درصد می‌باشد. با توجه به این مقادیر خطای محدود، می‌توان نتیجه گرفت که استفاده از دمای محیط به عنوان داده ورودی، روش بلوغ را به یک راهکار عملی و مقرون‌به‌صرفه برای تخمین مقاومت اولیه بتن در سایت تبدیل می‌کند و وابستگی به سخت‌افزارهای پیچیده را کاهش می‌دهد

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Estimation of in-situ compressive strength of concrete based on the maturity coefficient obtained from ambient temperature

نویسندگان [English]

  • Seyed Abbas Hosseini 1
  • Sasan Motaghed 2
  • Amin Mashhadi 3
  • , Mohammad Sadegh Shahidzadeh 4
1 Civil Engineering Department, Faculty of Engineering, Yasouj University, Yasouj, Iran.
2 Associate Prof., Department of Civil Engineering, Faculty of Civil engineering and architecture, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
3 Department of Civil Engineering, Faculty of Engineering, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran .
4 Department of Civil Engineering, Faculty of Engineering, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran.
چکیده [English]

Non-destructive evaluation of concrete properties at early ages is critical to ensure adequate strength development for the continuation of construction activities. The maturity method is widely recognized as an effective tool for estimating compressive strength based on the temperature history of concrete hydration; however, its reliance on measuring in-situ concrete temperature using embedded instrumentation poses practical challenges on construction sites. This study aims to propose a simplified and more practical site-oriented approach by investigating the feasibility of substituting ambient temperature history for in-concrete temperature data in the maturity model. To this end, strength predictions obtained from the conventional maturity method were compared with those derived from the proposed ambient-temperature-based approach. Evaluations were conducted on concrete specimens at ages less than 28 days under two distinct environmental conditions, corresponding to hot and cold seasons. Quantitative results indicate that the maximum relative error in strength estimation using the proposed method was limited to 5% during the hot season and 10% during the cold season. Considering these relatively small deviations, it can be concluded that employing ambient temperature as the input parameter transforms the maturity method into a practical and cost-effective solution for estimating early-age concrete strength on site, while significantly reducing dependence on complex instrumentation.

کلیدواژه‌ها [English]

  • Concrete maturity
  • in-situ strength
  • compressive strength
  • ambient temperature
  • non-destructive test

مراجع

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