A railroad sleeper

Abstract

It is described a railroad sleeper for fastening at least one pair of rails ( 2.2 ′) of 5 a railway network, the railroad sleeper ( 1 ) comprising a contact surface ( 3 ) on which each rail of the pair of rails ( 2.2 ′) is spaced fixed in relation to each other, the railway sleeper ( 1 ) comprising a hollow sector ( 4 ) delimited from the association of the contact surface ( 3 ) with anchorage walls ( 5.5 ′), thus establishing a free portion ( 17 ) adjacent to the anchorage walls ( 5,5 ′) and 10 opposite the contact surface ( 3 ), wherein the railroad sleeper ( 1, 1 ′) is manufactured from a composition comprising bending module greater than or equal to 5000 MPa.

What is claimed is: 
     
         1 . A railroad sleeper for fastening at least one pair of rails ( 2 . 2 ′) of a railway network, the railroad sleeper ( 1 ) comprising a contact surface ( 3 ) on which each rail of the pair of rails ( 2 . 2 ′) is spaced fixed in relation to each other, the railway sleeper ( 1 ) further comprising a hollow sector ( 4 ) delimited from the association of the contact surface ( 3 ) with anchorage walls ( 5 . 5 ′), thus establishing a free portion ( 17 ) adjacent to the anchorage walls ( 5 , 5 ′) and opposite the contact surface ( 3 ), wherein the railroad sleeper ( 1 ,  1 ′) is manufactured from a composition comprising bending a module greater than or equal to 5000 Mpa. 
     
     
         2 . Railroad sleeper according to  claim 1 , wherein the railroad sleeper ( 1 , 1 ′) is manufactured from a polymeric composition. 
     
     
         3 . Railroad sleeper according to  claim 1 , wherein the railroad sleeper ( 1 , 1 ′) is manufactured from a polymeric composition comprising polypropylene and fiberglass. 
     
     
         4 . Railroad sleeper according to  claim 3 , wherein the polymeric composition comprises 5% to 40% by mass of fiberglass in relation to the composition mass, more preferably between 33% and 37% by mass of fiberglass. 
     
     
         5 . Railroad sleeper according to  claim 1 , wherein at least fixation blocks ( 10 ) or metallic plates ( 22 ,  22 ′) are arranged at portions of the hollow sector ( 4 ) opposite the point of arrangement of the rails on the contact surface ( 3 ). 
     
     
         6 . Railroad sleeper according to  claim 1 , wherein the contact surface ( 3 ) and the anchorage walls ( 5 , 5 ′) establish an inner layer ( 13 ) of the railroad sleeper ( 1 , 1 ′), the inner layer ( 13 ) made from a polymeric material. 
     
     
         7 . Railroad sleeper according to  claim 1 , wherein the contact surface ( 3 ) and the anchorage walls ( 5 , 5 ′) establish an outer layer ( 14 ) of the railroad sleeper ( 1 , 1 ′), the outer layer ( 14 ) made from a polymeric material. 
     
     
         8 . Railroad sleeper according to  claim 1 , wherein the contact surface ( 3 ) and the anchorage walls ( 5 , 5 ′) establish an inner layer ( 13 ) and an outer layer ( 14 ) of the railroad sleeper, the inner layer ( 13 ) and outer layer ( 14 ) made from a polymeric material. 
     
     
         9 . Railroad sleeper according to  claim 6 , wherein the polymeric material comprises polypropylene. 
     
     
         10 . Railroad sleeper according to  claim 1 , further comprising a support surface ( 3 ′), the support surface ( 3 ′) delimiting the hollow sector ( 4 ) from the association of the contact surface ( 3 ) with the support surface ( 3 ′) and through the anchorage walls ( 5 . 5 ′). 
     
     
         11 . Railroad sleeper according to  claim 1 , wherein the contact surface ( 3 ) is a flat surface. 
     
     
         12 . Railroad sleeper according to  claim 1 , wherein the anchorage walls ( 5 , 5 ′) are arranged orthogonally to the contact surface ( 3 ). 
     
     
         13 . Railroad sleeper according to  claim 1 , wherein the anchorage walls ( 5 , 5 ′) are parallel or substantially parallel to each other. 
     
     
         14 . Railroad sleeper according to  claim 1 , wherein the anchorage walls ( 5 , 5 ′) are vertical or substantially vertical with respect to the ground.