Titlebook: Kosten- und Performance Management; Grundlagen - Instrum Michael Zell Textbook 2008 Gabler Verlag | Springer Fachmedien Wiesbaden GmbH, Wie

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ys to consider the effect of fiber on concrete, one approach assesses the effect of fibers considering a perturbed volume that they can generate in the mixture, another simulates the effect of fibers through the concept of equivalent diameter. This work examined these two methods, comparing the comp

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erties such as the compressive strength, tensile splitting strength, flexural strength, and toughness indexes were analyzed after the moist curing of concrete at 7 and 28 days. The toughness, as the one of an important parameter for fiber reinforced concrete, was determined in accordance with ASTM C

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out tests on untreated and treated fibers on a free calcium hydroxide matrix. Additionally, the mechanical performance of fiber reinforced concrete was analyzed through three-point bending tests. Treated fibers presented a brittle behavior in the pullout test. The alkali treatment did not contribute

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act characterization that, among other advantages, is able to distinguish the contribution of different types and dosages of fibres both at cracking and in cracked state. The impacts are applied on a simply supported notched prism of 150 × 150 × 300 mm, being the adopted span length 240 mm, the notc

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shrinkage, which results in microcracks in the cementitious matrix. Natural fibers appear as a low cost and eco-friendly alternative. However, these fibers are degradable in alkaline environments, resulting in changes in the mechanical performance of the composite. These fibers are also susceptible