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Mechanical properties and durability of latex modified fiber reinforced concrete: application of tunnel lining

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Document pages: 14 pages

Abstract: This study evaluated the mechanical properties and durability of latex modified fiber reinforced segment concrete (polyolefin based macro synthetic fiber and hybrid fiber macro synthetic fiber and polypropylene fiber) for tunnel lining. The test results show that the strength of low magnification synthetic fiber concrete is better than that of steel fiber concrete. Blast furnace slag concrete has high chloride ion permeability (poor permeability), but its compressive strength and flexural strength decrease with the increase of blast furnace slag content. In addition, hybrid fiber concrete has higher compressive strength, flexural strength, chloride ion water permeability, impact resistance and wear resistance than macro synthetic fiber concretee. The modified fiber improved the performance of concrete, and the hybrid fiber was found to control the formation of micro- and macrocracks more effectively. Therefore, overall performance of the hybrid fiber-reinforced concrete was found superior to the other fiber-reinforced concrete mixes tested for this study. The test results also indicated that macrosynthetic fiber could replace the steel fiber as a concrete reinforcement.

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