بررسی تاثیر باطله‌ زغال‌سنگ بر رفتار مکانیکی بتن سبز

نوع مقاله : مقاله پژوهشی

نویسندگان

1 عضو هیات علمی دانشگاه صنعتی نوشیروانی بابل

2 گروه عمران دانشگاه علوم و فنون مازندران

3 گروه عمران دانشگاه علوم و فنون مازندران بابل

10.22124/jcr.2021.19171.1489

چکیده

کاهش منابع طبیعی سبب تجدید نظر در استفاده از سنگدانه‌های طبیعی بتن شده است و محققین جهت کاهش بحران ضایعات و محیط زیست، به دنبال افزایش استفاده از ضایعات صنعتی می‌باشند، در این پژوهش جهت بررسی خصوصیات مکانیکی، سه سری نمونه بتنی با نسبت آب به سیمان یکسان(w/c=0.4) و درصد‌های مختلف باطله زغال سنگ درنظر گرفته شد. سری اول طرح شاهد، سری دوم و سوم به ترتیب شامل درشت دانه و ریز‌دانه‌ی باطله زغال‌سنگ بوده که جایگزین 5، 10، 15، 20 درصد از شن و ماسه شده است. طبق نتایج حاصل از آزمایشات در جایگزینی ۱۰ درصدی باطله زغال سنگ، عملکرد بهتری در مقاومت فشاری، مدول الاستسیته و سرعت عبور امواج نسبت به طرح شاهد مشاهده شده است، همچنین جایگزینی باطله زغال‌سنگ در بتن همواره موجب کاهش مقاومت کششی بتن می‌شود. بنابراین جایگزینی مناسب باطله در بتن، سبب بهبود برخی خواص مکانیکی و کاهش اثرات مخرب باطله بر محیط‌زیست می‌شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigation the effect of coal waste on Mechanical performance of green concrete

نویسندگان [English]

  • Morteza Naghipour 1
  • Shirin Ahmadi 2
  • Fatemeh Gorjinezhad 3
1 Prof, Of University in civil engineering dept.
2 Civil Eng. Dept, Mazandaran University of Science and Technology
3 Civil Eng. Dept, Mazandaran university ,of science and Technology
چکیده [English]

The reduction of natural resources makes researchers to revise the natural aggregates and find ways to reduce the negative effects of untreated wastes on the ecosystem of the region, so they have tried to increase the use of industrial waste material. In order to study the effect of untreated waste coal on mechanical performance of green concrete 9 mix designs with different contents of untreated coal waste (5%, 10%, 15%, 20%) as coarse and fine aggregates and constant water to cement ratio (w/c=0.4) were prepared. The results show that, replacing 10% of the aggregate with untreated coal waste instead of sand and gravel, compressive strength, elastic modulus and ultrasonic pulse velocity increase compared to plain concrete (without untreated coal waste). However, by increasing the percentage of coal waste, the tensile strength of the concrete specimens decrease compared to plain concrete. Thus selecting an appropriate amount of replacement untreated coal waste as a substitute for aggregate in concrete not only minimizes the negative impact of waste coal dumps, but also it can improve some properties of concrete, and be considered as a step toward sustainability.

کلیدواژه‌ها [English]

  • Green concrete
  • Untreated coal wastes
  • Mechanical properties
  • substitution materials

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