تأثیر زئولیت بر مقاومت تراکمی، نفوذپذیری و مقاومت در برابر حملات یون کلر در بتن

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه پژوهشی ساختمانی و معدنی، پژوهشگاه استاندارد، سازمان ملی استاندارد. کرج. ایران

2 مدیر بخش دوام بتن، شرکت نانو بتن امین

3 دانشجوی دکتری زمین شناسی مهندسی دانشگاه فردوسی، مشهد، ایران

چکیده

خوردگی از عوامل مخربی است که آسیب زیادی را به آرماتور داخل بتن می‌رساند و خسارات جبران‌ناپذیری را برای اقتصاد کشور ایجاد می‌کند. نفوذ یون کلر در بتن یکی از مهم‌ترین عوامل مؤثر برخوردگی بتن می باشد. ازاین‌رو لازم است که با شناسایی درست خصوصیات بتن با استفاده از روش‌های مناسب به مقابل با خوردگی پرداخته شود. در این تحقیق به ارزیابی تأثیر اضافه کردن زئولیت (0، 10 و 15 درصد) به بتن بر روی مقاومت تراکمی و میزان نفوذ یون کلر در بتن پرداخته‌شده است. با توجه به آزمایش‌ها انجام‌شده، با اضافه کردن زئولیت، در آغاز مقاومت تراکمی بتن کاهش می‌یابد ولی پس از گذشت 90 روز، مقاومت تراکمی افزایش می‌یابد و با مقاومت نمونه‌های شاهد تقریباً برابر می‌شود. همچنین زئولیت میزان نفوذ یون کلر در بتن را به‌طور متوسط 30% (در مقایسه با نمونه شاهد) کاهش می‌دهد. در نهایت با توجه به نتایج به‌دست‌آمده می‌توان بیان کرد که با استفاده از 10% زئولیت، خواص بتن بهبود می یابد.

کلیدواژه‌ها


عنوان مقاله [English]

Influence of zeolite on compressive strength, permeability and resistance to chlorine ion attack in concrete

نویسندگان [English]

  • Behzad Saeedi Razavi 1
  • Seyed Mohamad Rohani 2
  • Mojtaba Shiri 3
  • Behzad Mehdikhani 1
1 Department of Construction and Mineral Engineering, Technology and Engineering Research Center, Standard Research Institute (SRI), Karaj, Iran
2 Director of durability department of concrete, Amin Nano Concrete KnowledgeCo.
3 PhD student of engineering geology Ferdowsi University, Mashhad, Iran
چکیده [English]

Corrosion is one of the destructive factors that causes a lot of damage to the reinforcement inside the concrete and causes irreparable damage to the economy. Chlorine ion penetration in concrete is one of the most important factors affecting concrete corrosion. Therefore, it is necessary to refine corrosion by identifying the concrete properties using proper methods. In this study, the effect of adding zeolite (0, 10 and 15%) to concrete on the uniaxial compressive strength and penetration rate of chlorine ion in concrete was investigated. According to the tests result performed by adding zeolite at the beginning concrete compressive strength decreases but after 90 days the compressive strength increases and is approximately equal to the strength of control samples. Zeolite also reduces the penetration rate of chlorine ions into concrete by 30% on average (compared to the control sample). Finally, it can be concluded that using 10% zeolite improves the concrete properties.

کلیدواژه‌ها [English]

  • Concrete
  • Zeolite
  • Compressive strength
  • Chlorine ion
  • corrosion
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