کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5021786 1469372 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanical behavior and toughening mechanism of polycarboxylate superplasticizer modified graphene oxide reinforced cement composites
ترجمه فارسی عنوان
رفتار مکانیکی و مکانیسم سخت افزاری کامپوزیت های سیمان تقویت شده گرافیت اکسید گرافن پلی کربوکسیلات
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی
Graphene oxide (GO) has attracted increasing interests for the use as nano-reinforcement in cement composites. However, the dispersion problem of GO nanosheets in alkaline cement matrix has been restricting its real application. In this paper, polycarboxylate superplasticizer (PC) modified GO (PC@GO)1 was used to improve the dispersion of GO and the mechanical behavior of cement composites. The results show that PC@GO disperses uniformly in alkaline cement matrix and exhibits reinforcing effects on mechanical behavior of cement composites. With the addition of ∼0.242 wt% PC@GO (PC 0.22 wt%, GO 0.022 wt%) of cement, the compressive strength, flexural strength, Young's modulus and flexural toughness can be increased to 34.10%, 30.37%, 32.37% and 33%, respectively at early days. The toughening mechanism of PC@GO is attributed to its resistance to the formation and growth of cracks based on the characterization of cracks in scanning electron microscope images. This work has opened an effective way to use GO as a nano-reinforcing material for cement composites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Part B: Engineering - Volume 113, 15 March 2017, Pages 308-316
نویسندگان
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