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(Automatic translation)

Influence of porous acrylic fibers and mixtures conventional mixtures

David Gonzalez Feint
Research and Development Department Technical Fibres. Fisipe BARCELONA SA

Julián García Carretero
Roads Studies Center Center for Studies and Experimentation of Public Works (CEDEX)

ABSTRACT
The following article aims to evaluate the influence of the addition of acrylic fibers in different types of bituminous mixtures. The study conducted jointly by CEDEX (Center for Studies and Experimentation of Public Works of Spain) and Fisipe BARCELONA SA (manufacturer of acrylic fibers), deals with the improvements made by acrylic fibers in conventional and draining bituminous mixtures. First, the influence of acrylic fibers in the mastic rheology conventional mixtures and subsequently the behavior of mixtures plastic deformation and fatigue evolution studies. These two phenomena and their consequences, ruts and cracks are perhaps two of the biggest problems we have today on the roads. The test chosen to study the rheology of mastic has been the direct shear rheometer. plastic deformations are evaluated by testing laboratory on track, and to determine the resistance to fatigue cracking has been used to test dynamic flexural fatigue. It concludes with an analysis of firm life by bisar calculation program, to evaluate the effect of the use of acrylic fiber in the durability of mixtures. the porous asphalt and the influence of acrylic fibers in resistance to disintegration and abrasion traffic by cántabro test, both dry and after water immersion are also studied to evaluate the adhesiveness and resistance to the action of brash of Water. This paper aims to evolve the concept of the use of fibers in asphalt mixes, showing that acrylic fibers not only stabilize the bitumen and prevent runoff of it, but are also capable of modifying the rheology of the mix and properties mechanical thereof, especially properties relating to cohesion.

Keywords
acrylic fibers, plastic deformation, cohesion, cracking, porous mixtures.

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