Expansion joint for concrete works

Abstract

An expansion joint for concrete works, especially for paving concrete-based surfaces, in which said joint initially acts as a screed bar and guide rail for classic surface vibrators, which is formed by means of the functional combination of two profiled metallic pieces ( 1, 2 ), having a considerable length, essentially having a right triangular section, coupled by means of tongue and groove through one of their lateral sides ( 3 ), corresponding to one of the catheti of their section, such that both pieces together configure an isosceles triangle profile resting on the ground by means of height-adjustable supports and incorporating in correspondence with their top edge a pair of plastic strips ( 9 ) forming said guide for the surface vibrators.

1 . An expansion joint for concrete works, especially for paving concrete-based surfaces, in which said joint initially acts as a screed bar and guide rail for classic surface vibrators, wherein it is formed by means of the functional combination of two profiled metallic pieces ( 1 ,  2 ), having a considerable length, essentially having a right triangular section, that are coupled by means of tongue and groove through one of their lateral sides ( 3 ), corresponding to one of the catheti of their section, such that both pieces together configure an isosceles triangle profile resting on the ground through height-adjustable supports and incorporating in correspondence with their top edge a pair of plastic strips ( 9 ) forming said guide for the surface vibrators.  
   
   
       2 . An expansion joint for concrete works according to  claim 1 , wherein one of said pieces incorporates a wide side grooving ( 4 ) having a rectangular section for its tongue and groove coupling to the other piece, while the second piece incorporates a complementary outward deformation ( 5 ), also having a rectangular section, that is tightly coupled into said grooving.  
   
   
       3 . An expansion joint for concrete works according to  claim 1 , wherein each of the two metallic pieces incorporates in correspondence with its top vertex a small longitudinal grooving ( 8 ) open at the top portion, for coupling of the correspond plastic strip ( 9 ) substantially projecting from said grooving.  
   
   
       4 . An expansion joint for concrete works according to  claim 1 , wherein the top lateral side and bottom side of each profiled metallic piece incorporates a plurality of wide openings ( 6 ) allowing the passage therethrough of the concrete forming the pavement, whereas the inner walls through which both pieces are coupled together are closed.  
   
   
       5 . An expansion joint for concrete works according to  claim 1 , wherein each of the two profiled metallic pieces forming the joint is provided, at suitably spaced and distributed points, with vertically aligned openings ( 10 ) for the passage of respective vertical pins ( 11 ) acting as support and leveling means for the joint with which respective side stud bolts ( 13 ) collaborate, fixing the profiled pieces to said pins at any chosen height.  
   
   
       6 . An expansion joint for concrete works according to  claim 5 , wherein in addition to acting as such an expansion joint, it acts as a screed bar, a guide rail for the surface vibrators, an enclosure panel, a working joint and a contraction joint.