استفاده از روش تاگوچی در بهینه‌سازی مقاومت فشاری بتن خودتراکم سبک سازه-ای حاوی نانوسیلیس

یوسفی, محمدمهدی; همامی, پیمان; مظلوم, موسی

doi:10.22065/jsce.2021.234403.2163

استفاده از روش تاگوچی در بهینه‌سازی مقاومت فشاری بتن خودتراکم سبک سازه-ای حاوی نانوسیلیس

نوع مقاله : علمی - پژوهشی

نویسندگان

¹ دانشجوی دکتری مهندسی عمران سازه / گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه خوارزمی

² هیات علمی / گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه خوارزمی

³ استاد گروه مهندسی عمران/ دانشگاه تربیت دبیر شهید رجایی

10.22065/jsce.2021.234403.2163

چکیده

یکی از اهداف توسعه تکنولوژی بتن، طراحی بتن سبک با مشخصات مکانیکی مناسب سازه‌ای است، در حالت کلی، بتن سبک، مشخصات مکانیکی ضعیف‌تری نسبت به بتن متعارف و معمولی دارد، به‌همین منظور دراین پژوهش عوامل تاثیرگذار در مقاومت فشاری بتن خودتراکم سبک سازه‌ای حاوی نانوسیلیس با استفاده از روش تاگوچی مورد بررسی قرار گرفته است. طبق داده‌های بدست آمده از روش تاگوچی در مجموع 9 طرح مخلوط با در نظر گرفتن اثرات محتوای کل، مورد بررسی قرار گرفت که عبارت از نسبت آب به موادسیمانی، نسبت نانوسیلیس به موادسیمانی، نسبت فوق‌روان‌کننده به موادسیمانی و نسبت سنگدانه به کل وزن بتن می‌باشد. نتایج نشان می‌دهد که بیشترین تاثیر در مقاومت فشاری مربوط به تغییر نسبت آب به موادسیمانی است؛ که 5/56 درصد تاثیر در نتایج مقاومت فشاری دارد. درجه دوم اهمیت مربوط به نسبت نانوسیلیس به موادسیمانی با درصد تاثیر 1/36 بوده و بعد از آن‌ها تاثیر نسبت فوق‌روان‌کننده به موادسیمانی و تاثیر نسبت وزنی سنگدانه به کل بتن به ترتیب 7 درصد در درجه سوم و 4/0 درصد در درجه چهارم اهمیت قرار گرفت. درنهایت معیار کیفیت برای بتن سبک مدنظر قرار گرفت تا حالت بهینه برای رسیدن به بتن خودتراکم سبک سازه-ای حاوی نانوسیلیس با نسبت آب به موادسیمانی 35/0، درصد نانوسیلیس به موادسیمانی 4، درصد فوق‌روان‌کننده به موادسیمانی 8/0 و نسبت سنگدانه به کل حجم بتن 49/0 بدست آمد.

کلیدواژه‌ها

موضوعات

تحلیل، طراحی و اجرای سازه های بتنی

عنوان مقاله [English]

Using Taguchi method in optimizing the compressive strength of self-compacting lightweight structural concrete containing Nano-silica.

نویسندگان [English]

mohammad mahdi yoosefi ¹
Peyman Homami ²
Moosa Mazloom ³

¹ PhD student/ Faculty of Civil Engineering,, Kharazmi University

² Assistant Professor/ Department of Civil Engineering, Faculty of Engineering, Kharazmi University

³ Professor of the Faculty of Civil Engineering, Shahid Rajaei Teacher Training University of Tehran

چکیده [English]

Because of lightweight concrete has less mechanical properties than normal concrete, one of the objectives of engineering society is to design light weight concrete with a structural mechanical characteristic suitable for optimum resistance. Therefore, in this paper, using the Taguchi method to studied the parameters influencing of the compressive strength of Self-Compacting Light Weight Structural Concrete containing Nano-Silica. According to the Taguchi data, a total of 9 mixed designs were considered, taking into account the effects of the whole content, which included the ratio of water to cement materials, the ratio of Nano-silica to cement materials, the ratio of superplasticizer to cement materials, and the ratio of aggregate to total concrete weight. The results show that the maximum effect on the compressive strength is related to the change in water-to-cement ratio, which is about 56.5% of the impact on the pressure resistance. The percentage of Nano-silica to cement was 36.1. The third degree of impact on the compressive strength of the concrete is related to the effect of the superplasticizer ratio on the cement, which is about 7%, and finally the weight ratio of aggregates to the total concrete volume with an impact of about 0.4% in the fourth grade is important. Finally, the quality criterion was considered for lightweight concrete so that the optimal state for achieving Self-Compacting Light Weight Structural Concrete containing Nano-Silica with water to cement ratio was 0.35, the percentage of Nano-silica to cement was 4%, the superplasticizer percentage was 0.8%, the ratio of aggregate to total concrete volume was 0.48 obtained.

کلیدواژه‌ها [English]

Taguchi method
Self-compacting concrete
Lightweight structural concrete
Nano-silica
Optimal mixing design

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