US2150710A - Expansion joint for concrete pavements, walks, or the like - Google Patents

Description

March 14, 1939. w L I 2,150,710

EXPANSION JOINT FOR CONCRETE PAVEMENTS, WALKS, OR THE LIKE Filed Feb. 13, 1937 INVENTOR M F 75 BY M ATTORNEYS Patented Mar. 14, 1939 UNITED STATES.

EXPANSION JOINT FOR CONCRETE PAVE- MENTS, WALKS, OR THE LIKE James Banwell, Cleveland, Ohio Application February 13, 1937, Serial No. 125,657

8 Claims.

This invention relates to expansion joints and more particularly to retainers for the felt, asphalt or other expansible strips commonly placed between adjacent sections of a concrete pavement or walk.

An object of the invention is to provide easily installed or assembled means of economical construction for efliciently protecting and strengthening the joint, and for maintaining the same in its approximate original condition.

Other and further objects and advantages will herein be in part apparent and in part set forth as the description is considered in connection with the accompanying drawing:

Figure 1 is a fragmentary perspective view of a cement road embodying the invention, part of the cement material being omitted to show one of the mesh supporting members for the expansion strips; 7

Figure 2 is a section taken on the line 22 of Figure 1; and

Figure 3 is a plan view of one of the flat reinforcement sections or strips of wire mesh.

Referring more particularly to the drawing I denotes a pavement comprising a layer of concrete 2 resting upon the road bed 22, the numeral 3 representing the ground line.

As is well known, in constructing pavements of concrete it is necessary, in order to prevent undue cracking and heaving due to expansion or contraction incident to seasonal temperature.

changes, to provide expansion strips, of felt, asphalt or other suitable material embedded at intervals along the roadway in the concrete. It has also been the practice to anchor retaining and reinforcing plates of iron or steel in the concrete adjacent to and on opposite sides of the expansion strips. These joints have proven objectionable due to the fact that the supporting plates had a tendency to work loose in the concrete and furthermore did not wear down with the concrete. It also proved difficult to maintain these plates in close contact with the expansion strip without the use of expensive clamps. Furthermore these plates failed to reinforce the concrete facing the expansion joint.

According to the present invention I anchor a pair of spaced reinforcing and retaining members 4 in the dirt road bed adjacent to the expansible' felt or asphalt strip 5, one on each side of and arranged parallel with the strip. These members 4, are formed from flat sections or lengths 20 of heavy woven wire mesh bent to the configuration best illustrated in Figure 2. Thus each reinforcing member 4, has a vertically disposed inner wall 8 and an outer wall I terminating in legs 8 and 9 respectively, which are adapted to be forced into the road bed for securely anchoring the member 4 in upright position. Preferably the walls 6 contact the faces of expansion strip 5, throughout their entire length but they might under some conditions be slightly spaced therefrom. In any event, when the concrete is poured it will flow through the mesh of walls 6 into contact with the strip. The walls 6 thus become embedded in and therefore materially reinforce that portion of the concrete immediately adjacent the expansion strip, the area most subject to spalling.

It will be noted that intending a length or section 20 of wire mesh substantially intermediate the side edges to form the walls 6 and I the upper portion of the wall i is caused to lie adjacent to and parallel with the upper portion of wall 8, thus forming a narrow inverted U- shaped portion 8, the purpose of which will be presently described. The lower portion of the outer wall I of member 4 is offset or spaced considerably from but is also substantially parallel to the inner wall 6. A substantially horizontal connecting portion 9' extends between these upper and lower portions in and H of the wall I, and serves to reinforce the concrete in a longitudinal direction adjacent the area of greatest weakness or susceptibility to deterioration.

The inverted U-shaped portions 8' provide a double walled reinforcement for the concrete immediately adjacent to 01'' facing the strip 5 and also provide a narrow and wear resisting reinforcement portion which will gradually wear away to approximately the same degree that the concrete disintegrates at this point. The con-' crete when poured flows freely through all parts of the wire mesh and whenset the concrete and mesh constitute a substantially solid mass from which it is impossible for the mesh to work loose.

The expansion strips 5, and wire mesh memhers-4 are preferably laid at an angle cross-wise of the road so that wheels of vehicles passing thereover will engage one at a time and thus -lessen the hammering action of the wheels on the concrete adjacent the expansion strip. However the joint may be laid at right angles to the curbing.

If desirable flat sections or lengths 20 of wire mesh may be connected to or above the substantially horizontal portion 9 of the walls 1, for additionally reinforcing the concrete in an obvious manner.

Having thus described my invention:

What I claim is: '3

1. In a joint for concrete pavements, an expansion strip, a retainer for said strip comprising a heavy wire mesh anchored in the road bed and embedded in the concrete, said retainer having an inner wall adjacent one side face of the strip, said retainer having an outer wall extending at its upper and lower portions substantially parallel to said inner wall, and a substantially horizontal portion connecting said upper and lower portions.

2. In a joint for concrete pavements and the like, an expansion strip, a wire mesh member anchored in the roadbed embedded in the concrete and having a wall parallel with and adjacent one face of the expansion strip, said wire mesh member having an outer wall comprising an upper portion and an offset lower portion.

8. A retainer for the expansion strips of concrete pavements formed of a section or length of wire mesh bent to provide a narrow upper double walled area and a lower doubled walled area of greater width than said upper area, and means for'embedding said retainer in the road 4. In an expansion joint for concrete sections, the combination of two reinforcing members of heavy woven material for adjacent sections of concrete, a resilient strip between said reinforcing members, said members having a portion parallel to and co -extensive with said strip embedded in the concrete adjacent opposite faces of said strip. a

5. In an expansion joint for concrete sections, the combination of two heavy wire mesh reinforcing members for adjacent sections of 'concrete, a resilient strip between said adjacent sections, said reinforcing members having a wall embedded in said sections adjacent said strip and the upper portion of said wall being of double thickness.

'7. In a joint for concrete pavements. a vertically disposed expansion strip, a combined retainer and reinforcement on each side of said strip anchored in the road bed and each composed of wire mesh having a vertical wall engaging the expansion strip and an oblique wall bracing the same whereby the expansion strip is held in its vertical position while the concrete is being poured and the sections of concrete reinforced on each side of the expansion strip.

8. In a joint for concrete pavements, a vertically disposed expansion strip, a combined retainer and reinforcementon each side of said expansion strip and each composed of wire mesh of approximately inverted V-shape having one wall parallel with the expansion strip and supporting the same and having its free ends embedded in the road bed, whereby the expansion strip-is held during pouring of the concrete and the sections of concrete reinforced on each side of the expansion strip.

JAMES BANWELL.

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