Browsing by Author "SAIF UR REHMAN"

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    Durability of fiber reinforced concrete
    (UMT.Lahore, 2021) MUHAMMAD AFAQ ALAM; SAIF UR REHMAN; MOHAMMAD WASIF RIAZ; MEHAR HASAN ALI
    Concrete is one of the foremost adoptable construction materials widely used all over the globe because of the supply of its related substances, its low relative value and its lower preservation necessities. Concrete strength, durability, and other features are depending on the properties of its constituents, mix design, compaction process, and controls taken throughout placement, and curing. The aim was to enhance these properties by uniformly adding small and discontinuous fibers of different materials dispersed into concrete to explore the durability properties of concrete. The induction of these fibers enhances the concrete compressive strength drastically. In this thesis, the effects of different percentages of fibers on the durability of M20 grade concrete have been investigated. In the experimental study fiber doses of 5%, 10% of glass and 5%, 10% of steel and 5%, 5% composites of steel and glass by the weight of cement were added. Concrete cylinders were examined for compressive strength after being exposed to acid (Sulphuric acid and hydrochloric acid), alkali (sodium hydroxide), and distilled water attack for 28 and 56 days of curing period. The maximum strength gained at 10% steel fibers after 56 days curing in water was 28.5 MPa which is 12.3 % greater than the controlled concrete specimens. But in glass fibers the compressive strength was going to decrease by increasing percentage of fibers. At 10% of glass fibers the compressive strength is reduced 2% w.r.t to controlled samples. After being subjected to acid attack, the results showed that increasing the volume fraction of fibers resulted an increase in compressive strength. Higher volume of FRC has showed a greater resistance against to acid attack.