An investigation on the behaviour of metakaoline based hybrid fiber reinforced concrete when subjected to acid attack
  Shreepad Desai and Prakash K.B.
  Combining fibres with different geometry and mechanical properties can improve the mechanical properties of fibre reinforced concrete. Often called hybrid fibre reinforced concrete (HFRC), these composites take advantage of different and synergistic effects on mechanical properties of each fibre type. Macrofibers of steel, due to their high modulus and improved bonding characteristics are known to improve toughness of concrete at relatively small crack openings; on the other hand, micro-fibres of polypropylene are expected to mitigate shrinkage cracking, improve the tensile strength of the matrix, improve the crack growth resistance and enhance strain capability. In this experimental work an attempt is made to study the strength characteristics of metakaoline based hybrid fiber reinforced concrete when subjected to acidic attack. Different fibers used in the work are steel fibers (SF), galvanized iron fibers (GIF), waste coiled steel fibers (WCSF), high density polyethylene fibers (HDPEF), waste plastic fibers (WPF) and polypropylene fibers (PPF). Different combinations of hybrid fibers used for the study are (SF+GIF), (SF+WCSF), (SF+HDPEF), (SF+WPF) and (SF+PPF).
 

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