US1750105A - Concrete joint - Google Patents

Description

March 11, 1930. J HELTZEL 1,750,105

CONCRETE JOINT Filed Nov. 19, 1926 Patented Mar. 1 1, 1930 UNITED STATES,

JOHN N. ,HELTZEL, or WARREN, onro CONCRETE JOINT Application filed November 19, 1926. Serial No. 149,443.,

The present invention relates to concrete joints, suchas intended for concrete roads and other surfacing structures, and it is the object of this invention to provide novel and 5 improved means for controlling the breaks and defining the joints of the road for other cementitious structure, this invention being an improvement over the oints disclosed in mycopending application Serial No. 3,972, filed January 22, 1925.--

A further object is to combine in a'sim-ple and effective manner the joint defining means with reinforcing rods or other reinforcement embedded in the concrete.

With the foregoing and other objects in view, which will be apparent as the description proceeds, the invention resides in the construction and arrangement-0f parts, as,

hereinafter described and claimed, it being understood that changes can be made within the scope of what is claimed, without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawings, wherein-' Figure 1 is a perspective view of a concrete road constructed in accordance with the present invention, portions being broken away to illustrate the details more clearly.

Fig.2 is a fragmentary perspective view illustrating a modification.

Figs. 3 and 4 are fragmentary perspective views illustrating other modifications,

Fig.5 is a cross section of the longitudinal joint strip as shown in Fig. 4. Fig. 6 IS a fragmentary perspective view illustrating another variation in the form of joint stri s. I v Fig. 1 illustrates the side form rails 10 between which the grout or ag regate is poured and which define the side e ges of the road under construction. Reinforcement is dis- ,posed between the rails or forms 10 above the sub-base to be embedded in the concrete, and [as shown in Fig. 1, such reinforcement is of mesh form, comprising the longitudinal rods 11 and transverse rods 12 interwoven. .The longitudinal rods 12 are interrupted or spaced apart along the lines of the transverse joints, to ermit of expansion and contraction of the sla s or sections of concrete.

In carrying out the invention the transverse reinforcing rods 12, or at least some of them, terminate adjacent to the longitudi-. nal center or joint line of the road and are bent upwardly, as at 13, so as to receive between them longitudinal strips 14 or other suitable joint-defining members, in order to support said strips or members in place on the reinforcement during the pouring and finishing of the aggregate, the reinforcement and strips 14 being embedded in the cementitious material. Transverse joint defining strips or members 15 may be similarly embedded in the material to define the transverse joints or breaks of the concrete, and the strips 14 and 15 may be withdrawn from the concrete before it has hardened, so as to leave grooves in the surface of concrete to be filled with; tar, macadam, or other sealing material. The strips 14 and 15 divide the concrete intothe slabs 16, and by combining the joint defining or producing means with the reinforcement this will provide for economical and eflicient roadconstruction.

\Fig. 2 illustrates how the joint strips may be eliminated by employing the upstanding inner terminals 13 of the transverse rein.- forcing rods 12 to define or form the longitudinal break or joint, said terminals 13" extending along the line of the break or joint so desired so as to produce a weakened plane or line along the concrete, so that the concrete, when hardened, will break along said line rather than along an irregular line as when a natural break occurs. -The longitudinal reinforcing rods 11 may have similar upturned terminals for defining the transverse breaks.

Fig. 3 illustrates a sheet 11 of expanded metal embedded in each slab or section 16 of the concrete, and said sheets provide the re inforcement." The sheets have the u standing flanges or strips 14 and 15 we ded or otherwise secured thereto to define the longitudinal and transverse joints.

Fig. 4 illustrates the longitudinal and transverse strips 14 and 15 as having lu s 13" at their lower edges pressed alternate y towardfopposite sides, and the lugs have apertures 17 through which the reinforcing rods lot 11 and 12 extend, in order to support the strips in place. The lugs 13 being offset toward opposite sides Will brace the strips and maintain them in upright edgewise position. Fig. 6 illustrates a modified form of longitudinal strip 14 which has at its lower edge the lu s or portions 13 bent toward opposite si es and provided with depending terminals having the apertures 17 to en age the reinforcing rods, said apertures having slits or slots extending to the lower edges of the portions 13 in order that said ortions 13 may be sprung over the rods wit out having to insert the rods endwise through the apertures. The strip 14: is also shown as having longitudinal corrugations 18 so that the slabs or sections of concrete will have interengaging tongues and grooves along their adjacent edges to provide interlocking hinge joints to permit of flexing action.

The strips, such as shown in Figs. 1, 3, A; and 6, may be welded to the reinforcing rods.

Having thus described the invention, what isrclaimed as new is i 1. A concrete surfacing structure having reinforcement embedded therein, and a joint defining strip extending over said reinforcement, the reinforcement including rods having upwardly bent terminal portions to hold the strip in place. l

2. A concrete surfacing structure having reinforcement embedded therein, and a joint defining strip extending over said reinforcement, the reinforcement including rods ex tending under said strip and having upwardly bent terminal portions at opposite sides of said strip.

3. A concrete surfacing structure reinforcement, and a joint defining strip extending thereover, said reinforcement including -rods having upturned terminals holding said strip in place.

4. A concrete surfacing structure reinforcement, and a joint defining strip extending thereover, said reinforcement including ro s extending under said strip and having upturned terminals at opposite sides of the strip.

therein, said reinforcement includin 'rods extending under said joint means and aving upwardly extending terminal portions engaging said joint means.

.6. A concrete surfacing structure reinforcement and joint means thereon, said reinforcement havin rods extending under said means and provi ed with upturned terminals at opposite sides of said means for holding same in place.

In testimony whereof I hereunto aflix my signature.

JOHN N. HELTZEL.

5. A concrete surfacing structure having I joint means and reinforcement embedded

Images