Search for: filled-polymers
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    Effect of plasma electrolytic oxidation on joining of AA 5052 aluminium alloy to polypropylene using friction stir spot welding

    , Article Surface and Coatings Technology ; Volume 313 , 2017 , Pages 274-281 ; 02578972 (ISSN) Aliasghari, S ; Ghorbani, M ; Skeldon, P ; Karami, H ; Movahedi, M ; Sharif University of Technology
    Elsevier B.V  2017
    The effect of a plasma electrolytic oxidation (PEO) pre-treatment on joining of AA 5052 aluminium alloy and polypropylene by friction stir spot welding (FSSW) is investigated using lap tensile shear tests. Two surface conditions of the AA 5052 alloy are compared, one with a PEO pre-treatment in a silicate-based electrolyte, another without any pre-treatment. The resultant specimens are examined by high resolution scanning electron microscopy, thermogravimetric analysis and attenuated total reflectance-infrared spectroscopy. The PEO treatment generated a thermally-insulating, porous ceramic coating, which has a highly porous, rough surface that is favourable for incorporating polypropylene... 

    Performance of polypropylene fiber reinforced concrete-filled UPVC tube columns under axial compression

    , Article Construction and Building Materials ; Volume 231 , 20 January , 2020 Mohammad Askari, S ; Khaloo, A ; Borhani, M. H ; Tale Masoule, M. S ; Sharif University of Technology
    Elsevier Ltd  2020
    This paper aims to study the behavior of UPVC-confined columns reinforced with polypropylene fibers under axial compression. A sum of 42 column specimens has been tested, including 18 Unconfined Concrete Cylinders (UCC) and 24 confined Concrete-Filled UPVC Tube (CFUT) specimens. To investigate the sensitivity of these columns to various parameters, different levels of material volumes have been used, which include two concrete strengths of 40 and 50 MPa, two tube grades of PN6 and PN10, and three polypropylene fiber content of 0, 1 and 3 kg/m3 of the concrete mixture. The influence of each variable on the ultimate strength, ductility and confinement effectiveness of the specimens have been...