کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8943132 1645134 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure and mechanical performance of graphene reinforced cementitious composites
ترجمه فارسی عنوان
ریزساختار و عملکرد مکانیکی کامپوزیت های سیمانی تقویت شده گرافن
کلمات کلیدی
کامپوزیت گرافن-سیمان، ریز ساختار، استحکام خمشی، اترینگیت، ویژگی های مکانیکی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
An experimental investigation of the microstructure and mechanical properties of graphene-reinforced cementitious composites is presented. The early-age microstructure of the grapheme/cement composites was examined by scanning electron microscopy (SEM). The SEM images revealed that ettringite, C-S-H gel and other hydration crystals were connected by graphene sheets, which formed a 3-D structure that could bridge the cracks and fill the pores in cement matrix. With the increase of hydration ages, the 3-D structure became more complicated and connection between the graphene and cement hydrates became stronger. The X-ray powder diffraction (XRD) analysis suggested that the amount of ettringite increased with the increase of graphene content, indicating that graphene sheets could promote the formation of ettringite. In addition, the mechanical strength of graphene/cement matrix was measured. The reinforcing effect of graphene is most obvious with the addition of 0.03 wt.% graphene, with which the flexural strength increased by 40%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Part A: Applied Science and Manufacturing - Volume 114, November 2018, Pages 188-195
نویسندگان
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