کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
269806 504702 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High temperature behaviour of polypropylene fibres reinforced mortars
ترجمه فارسی عنوان
رفتار درجه حرارت بالا از پلی پروپیلن خمپاره تقویت شده
کلمات کلیدی
ملات فیبر پلی پروپیلن، رفتار مکانیکی، انرژی شکستگی، آزمایش آتش، اسپلینگ، تست برش پانچ
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


• Effects of fire on polypropylene fibers mortars is studied
• Two types of thermal treatment were employed: muffle furnace and flame heating.
• Evolution of flexural behavior with respect of temperature is given.
• Polypropylene fibers mortar shows net benefits until 500 °C but not above.

The aim of this paper is primarily experimental and is intended to analyse the behaviour of two cementitious materials, before and after heat treatment: one unreinforced (i.e. without fibres) and the other reinforced (with polypropylene fibres).At room temperature and after heating up to 500 °C, the bending strength is improved by the presences of fibres. The residual young modulus is slightly higher for the fibres reinforced samples.As the temperature increases, the strength gain due to fibres inclusion is reduced. Beyond 500 °C, the bending strength is lower for the fibre reinforced cementitious material compared to those without fibres. Fracture energy is also improved for the fibre mortars at room temperature. At 400 °C this improvement decreases gradually with the introduction of polypropylene fibres. Beyond this temperature and due to the introduction of polypropylene fibres, the fracture energy is reduced.Another test is developed: rapid heating due to exposure to a flame. The temperature in the front side reaches in few seconds 1000 °C. At this temperature and after one hour of exposure, the opposite side reached 140 °C. After cooling, the punching shear strength of the fibre mortar is definitely weaker than of the mortar without fibre.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fire Safety Journal - Volume 71, January 2015, Pages 324–331
نویسندگان
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