Study of the Mechanical Properties of Concrete with Sisal and Polypropylene Fibers

Abstract:

Fiber concretes have been revolutionizing the market, as well as lower operating costs, structurally act. The total or partial replacement of steel with natural fiber reinforced concrete could be an economical way to provide an alternative method to achieve greater security in concrete structures, as well as a way to use materials that are energy efficient, economic and ecological.Sisal fiber reinforcement is promising for use in composite materials, due to their low cost, low density, high strength and specific modulus, without risk to health, readily available in some countries and renewal.We studied four different dosages of concrete: without fiber, with two different types of polypropylene (PP) fibers and with sisal fiber. Consistency of fresh concrete, bulk density, water absorption, capillary absorption, compressive strength and microstructural properties values of the samples were investigated.Regarding the consistency of fresh concrete, measured by testing Abrams cone, as the results show a substantial difference between the flowability of the concrete without addition of fibers and other dosages with different types of fibers studied. The compressive strength test at 7 and 21 days also shows resistance as early ages performed fiber, while with increasing days of curing, the resistance becomes a reaction product of cement and pozzolanic water have no effect added fiber. Absorption tests and capillary absorption of water, like the above, consistent with the results shown bibliographic polled, the results being higher in both assays for dosages comprised of PP and sisal fibers.

• Periodical: Key Engineering Materials (Volume 663)
• Pages: 115-123
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.663.115
• Online since: September 2015
• Authors: Sergio Martínez-Martínez*, Francisco A. Corpas-Iglesias
• Keywords: Concrete, Natural Fibers, Polypropylene, Sisal, Vegetables Wastes

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