استفاده از امواج توان زیاد آلتراسونیک به منظور کاهش میزان جذب آب در بتن معمولی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 مهندسی و مدیریت ساخت، واحدعلوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

2 عضو هیات علمی دانشگاه صدا و سیما-دانشکده مهندسی صدا

10.22124/jcr.2021.18733.1477

چکیده

: امروزه، بتن به دلیل دارا بودن مقاومت فشاری زیاد، مقاومت در برابر آتش سوزی، دوام زیاد در محیط‌های خورنده و نفوذ پذیری کم، کاربرد وسیعی در پروژه‌های مختلف دارد. موثر بودن امواج فراصوتی توان زیاد با توجه به نداشتن آلودگی صوتی در صنایع ساخت و تولید نظیر کاهش نیروهای ماشینکاری، افزایش صافی سطح، ریزدانه کردن فلزات در حین انجماد می‌تواند انگیزه استفاده آن در صنعت ساختمان نیز باشد. بدین منظور در این تحقیق، استفاده از امواج توان زیاد فراصوتی با توان های مختلف، زمانهای متفاوت و فرکانس 20 کیلو هرتز در متراکم‌سازی بتن و تاثیر آن بر میزان جذب آب نیم‌ساعته بتن مورد بررسی قرار گرفته است. نتایج این تحقیق نشان می‌دهند که استفاده از امواج توان زیاد فراصوتی به عنوان یک فرآیند تکمیلی در متراکم سازی بتن تازه، منجر به کاهش میزان جذب آب نیم‌ساعته بتن در حدود 5/12 تا 5/15 درصد، برحسب شکل قالب آزمونه بتن خواهد شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Using high power ultrasonic waves to reduce water absorption in ordinary concrete

نویسندگان [English]

  • seyed mohsen karimi 1
  • saber saffar 2
  • majid safehian 1
1 Islamic Azad University Science and Research Branch
2 IRIB university-faculty member of Audio engineering
چکیده [English]

Today, concrete has a wide range of applications in various projects due to its desirable properties such as high compressive strength, fire resistance, high durability in corrosive environments and low permeability. Therefore, the use of effective methods for the principled compaction of concrete in order to improve the mechanical properties of concrete is of great importance. For this purpose, for the first time in this study, the use of high ultrasonic power waves with different powers, different times and 20 kHz frequency in concrete compaction and its effect on the water absorption rate of half an hour of concrete has been investigated. The results of this study show that the use of high ultrasonic power waves as a complementary process in the compaction of fresh concrete, leads to a reduction in the water absorption rate of half an hour of concrete about 12.5 to 15.5 percent, depending on the shape of the test mold.

کلیدواژه‌ها [English]

  • Concrete Density
  • Concrete Water Absorption
  • Sound Waves
  • High Power
  • Frequency
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