بررسی آزمایشگاهی خواص مقاومتی و دوام بتن‌های ساخته شده با زئولیت حرارت داده شده

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده مهندسی عمران، دانشگاه سمنان، سمنان، ایران.

10.22091/cer.2024.10381.1540

چکیده

سیمان در بتن که مهم‌ترین جزو این ماده بوده‌ و با ایجاد چسبندگی بین سنگدانه‌ها باعث تشکیل مخلوط بتن می‌شود. با توجه به ارتقای کمی و کیفی سیمان در مخلوط بتن و نیز کاهش آلودگی‌های زیست محیطی و بهبود مصرف انرژی در صنعت سیمان و بتن پژوهشگران و محققان به دنبال راهکارهایی جهت نیل به این اهداف با نگرش به توسعه پایدار بوده‌اند. استفاده از مواد مکمل سیمان و مواد پوزولانی یکی از این راهکارها بوده ‌است. دلیل کاربرد گسترده این مواد جدای از حفظ محیط‌زیست و کاهش هزینه‌های اقتصادی، بهبود خواص مکانیکی و دوام بتن در شرایط محیطی مخرب است. در این پژوهش، از زئولیت معمولی و حرارت دیده تحت سه دمای مختلف به عنوان پوزولان بهره گرفته شده ‌است. در ابتدا نمونه‌های بتنی با 16 طرح مخلوط جهت بررسی مقاومت فشاری و اسلامپ نمونه‌ها ساخته شد. در مرحله بعد از طرح مخلوط‌‌های بهینه جهت سنجش مقاومت بتن در محیط‌های ناسالم (سولفاتی) مورد تحقیق و بررسی قرار گرفت. افزودن زئولیت حرارت دیده تحت دمای 200 درجه نسبت به زئولیت معمولی در بتن موجب افزایش مقاومت به ویژه در بلندمدت نسبت به نمونه‌های مرجع شده است. همچنین زئولیت حرارت دیده تحت دمای 200 درجه در سن کم و مقاومت بالاتر مقاومت بهتری را نتیجه می‌دهد. نتایج آزمایشات دوام در فاز دوم نشان دادند که دوام نمونه‌های با مقاومت بالاتر به دلیل زئولیت بیشتر جایگزین سیمان حاوی زئولیت 200 درجه در محیط سولفاتی مقاومت بیشتر از بتن معمولی داشته است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Experimental Investigation of Strength and Durability Properties of Concretes Cast with Heated Zeolite

نویسندگان [English]

  • Mohammad Reza Shahhoseini
  • Mohammad Kazem Sharbatdar
  • Ali Kheyroddin
Faculty of Civil Engineering, Semnan University, Semnan, Iran.
چکیده [English]

Cement in concrete، which is the most important part of this material and causes the concrete mixture to form by creating adhesion between the aggregates. Due to the qualitative and quantitative improvement of cement in concrete mix, as well as the reduction of environmental pollution and the improvement of energy consumption in the cement and concrete industry, researchers and researchers are looking for solutions to achieve. These goals with an attitude to sustainable development. The use of cement supplements and pozzolanic materials has been one of these solutions. The reason for the widespread application of these materials, apart from environmental protection and economic cost reduction, is to improve concrete's mechanical properties and durability in destructive environmental conditions. In this study, ordinary and heated zeolite was used under three different temperatures as pozzolan. Initially, concrete samples were made with 16 mixed designs to study compressive strength and Islamp samples. In the next step, the design of optimal mixtures to measure concrete resistance in unhealthy environments was investigated and investigated. The addition of heated zeolite under 200 degrees compared to conventional zeolite in concrete has increased resistance, especially in the long run, compared to reference samples. Also, the zeolite heated under 200 degrees at a young age and higher strength results in better resistance. The results of durability tests in the second phase showed that the durability of higher-strength samples due to more zeolite substituted 200-degree zeolite cement in the sulfate environment was more resistant than conventional concrete.

کلیدواژه‌ها [English]

  • Zeolite
  • Concrete
  • Pozzolan
  • Strength
  • Durability
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