نوع مقاله : Original Articles

نویسندگان

1 گروه مهندسی محیط زیست، دانشکده محیط زیست، کرج، ایران

2 مرکز تحقیقات صنایع معدنی، دانشگاه شهید باهنر کرمان، کرمان، ایران

چکیده

سابقه و هدف:
ساخت بتن های سبز از منظر سازگاری مناسب آن با محیط زیست و از منظر کاهش اثرات زیست محیطی ناشی از تولید مصالح مورد استفاده در ساخت بتن از اهمیت ویژه برخوردار است.
مواد و روش ­ها:
در پژوهش حاضر، از گل قرمز و سرباره ذوب آهن به عنوان جایگزین سیمان استفاده شده تا عملکرد آنها را بر مقاومت فشاری بتن های پر مقاومت معمولی و زودرس تحت w/b های مختلف مورد بررسی قرار دهد. با هدف بهینه سازی سه متغیر درصد گل قرمز، درصد سرباره و w/b، آزمایش های مورد نیاز با استفاده از نرم افزار DX7 طراحی شدند و 18 اختلاط متناظر با این طراحی آزمایش ساخته شد و طی 7، 28 و 56 روز عمل آوری و آزمایش شد.
نتایج و بحث:
با توجه نتایج حاصل از بارگذاری نمونه های بتنی ساخته شده، مقدار بهینه گل قرمز و سرباره درw/b  معادل با 0.3 و 0.375 به ترتیب برابر (15% و 10%) و (7.5% و 20%) تعیین شده است که از نظر مقاومت فشاری، همزمان استاندارد بتن های پرمقاومت معمولی و زودرس را تامین می نماید.
نتیجه ­گیری:
طرح­ های اختلاط بهینه بدست آمده در این تحقیق، توانسته به مقاومتی حدود 90 مگاپاسکال دست یابد. که این مهم، خود نشان از عملکرد خوب گل قرمز و سرباره ذوب آهن به عنوان جایگزین سیمان می باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Investigating the effects of red mud and GGBFS industrial waste on the compression strength of high-performance green concretes

نویسندگان [English]

  • Ravanbakhsh Shirdam 1
  • Amir Shirka 1
  • Sina Hassanoghli 1
  • Nematollah Bakhshi 2

1 Department of Environmental Engineering, Faculty of Environment, Karaj, Iran

2 Mineral Industries Research Center, Shahid Bahonar University of Kerman, Kerman, Iran

چکیده [English]

Introduction:
The construction of green concrete is of utmost importance, due to its high compatibility with the environment, and also because of the reduction in the environmental side-effects related to the manufacture of materials used in concrete construction.
Material and methods:
The current investigation made use of red mud and ground granulated blast furnace slag (GGBFS) as (supplementary material) to cement, in order to observe their effects on the compressive strength of ordinary and early high strength concretes within various water to binder ratios (w/b). The required tests were designed using DX7 software, meaning to optimize the three variables of red mud percentage, slag percentage, and w/b ratio. Eighteen mixes were produced within 7, 28, and 56 days, according to the test design.
Results and discussion:
The produced concrete specimens demonstrated an optimized red mud and slag amount of (15%, 10%) and (7.5%, 20%), with the w/b equaling 0.3 and 0.375, respectively, keeping pace with the standards of both normal and early high strength concretes, in terms of strength.
Conclusion:
The optimized mixes obtained in the current study were able to achieve a strength of 90 MPa. The above indicates the suitability of red mud and GGBFS as an alternative to cement.

کلیدواژه‌ها [English]

  • Red Mud
  • GGBFS
  • HPC
  • Compression Strength

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