تأثیر ترکیب سنگدانه‌های سنگین مگنتیت و الیاف فولادی در بهبود خواص مکانیکی بتن‌های سنگین

نوع مقاله : پژوهشی

نویسندگان

1 دانشگاه سمنان

2 سمنان

چکیده

در این مقاله خصوصیات مکانیکی بتن‌های ویژه بااستفاده از سنگدانه‌های سنگین مگنتیت و الیاف فولادی با 24 طرح اختلاط با درصدهای 0، 50 و 100% سنگدانه‌های سنگین جایگزین سنگدانه‌های معمولی، با نسبت‌های آب به سیمان 52/0 و 4/0 و الیاف فولادی با درصدهای 0، 1، 5/1 و 2% با مجموعاً 300 نمونۀ آزمایشگاهی مکعبی، استوانه‌ای، تیر بررسی گردید. نتایج نشان داد که استفاده از سنگدانه‌های سنگین و الیاف فولادی باعث افزایش مقاومت‌های فشاری، کششی و برشی بتن شد و بیشترین تأثیر در نمونه‌های با 50% سنگدانۀ سنگین و 2% الیاف اتفاق افتاد.

کلیدواژه‌ها


عنوان مقاله [English]

Magnetic Aggreagates and Steel Fibre Combination Effect on Improving of Mechanical Characteristics of High Weight Concrete

نویسندگان [English]

  • Mohammad Kazem Sharbatdar 1
  • Majid Mehrbod 2
1 Semnan University
2 Semnan University
چکیده [English]

In this paper, the mechanical properties of special concrete with magnetic heavy weight aggregates and steel fibres, from 24 different mixed designs with 0, 50, 100% of heavy weight aggregates replacing with regular aggregates, 0.52 and 0.4 water-cement ratios and 0, 1, 1.5 and 2% of steel fibers, totally 300 specimens including cubic, cylindrical, and beam was investigated. The results showed that the compressive, tensile and shear strenghts were improved with using special aggreagate and fibres particularly with 50% high weight aggreagate and 2% steel fibres.

کلیدواژه‌ها [English]

  • Special Concrete
  • Steel Fibers
  • Heavy Aggregates
  • shear
  • compressive
  • tensile
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