DE1918257U - EXPANSION JOINT BOARD. - Google Patents

Description

Rehau-Plastiks G.m.b.H., Rehau / Bavaria. Expansion joint board.

When building the freeway and road construction, the edge strips (boundary strips) are made of concrete mortar on both of them Sides approx. Every 5 m wood trim, so-called joint boards, inserted, which result after the hardening of the concrete mortar between the Baix elements, those of the expansion of the concrete Take this into account and avoid cracking.

When the concrete has set, a special sawing machine is used the concrete strip is sawn in from above in its entire width by approx. 40 mm, precisely above and in the axis of these grout boards. By inserting a potting compound into the saw gap, a watertight seal is created the parting line achieved.

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This working method and method is time consuming and involves higher costs.

The saw cut is lifted between the inner edge trim and -outside, drainage is still necessary so that the water that collects between the concrete strips during the construction time can be derived to the outside.

With the previous construction, there is a risk that the wooden pug bread when pasted into the still soft concrete can sit at an angle by shifting. The saw cut will then not run in the axis of the board no longer provides a proper seal, as it also laterally joins the remaining boards after the board has rotted or resulting gaps.

It has now been found that a considerable reduction in work is achieved if the production is carried out according to the invention the parting lines an expansion joint board made of elastic material used, which has an easily torn-off head part, whereby the complex saw cut

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falls. A board of this type is first cemented in in its full length and height when the parting line is made in such a way that the head part with the surface of the concrete parts to be bridged in the same or is approximately the same level. After the concrete has solidified, the head section of the rest of the expansion joint board is now that remains in the parting line, easily torn off by a break edge. You get one to the outside emerging joint, which is now filled with a suitable casting compound. In the final state, therefore the parting line between the two concrete elements in its lower part through the elastic expansion joint board and bridged in its upper part by a layer of potting compound.

The expansion joint board according to the fire is appropriate provided with several elastic crossbars in a round or angular design, which are designed as channels. Through this the aforementioned cross drainage becomes possible, the additional construction site drainage is omitted.

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The expansion joint boards are cut in pixel lengths, the variable according to. Width and height of the concrete or boundary strips can be delivered.

The! Price increase is based on the pig. 1 to 3 explained in more detail. Show it:

ig. 1 shows an embodiment of an expansion joint board;

Pig. 2 the cross-section duroh the head part of the expansion joint board of the lig. 1 in enlarged Scale and

FIG. 5 shows a schematic representation of FIG

Expansion joint boards in the installed state.

The expansion joint board consists of the tubular Hollow body 1, which is divided on the inside with crossbars 2. The transverse webs are, as mentioned above, channel-shaped or in the same direction slightly conical and have the purpose of im

State of use that changes during the construction period between the Boundary strips to drain away accumulating water. At the same time, they increase the transverse rigidity of the hollow body. On The sides of the hollow body are provided with a barb-like profile or cams 3. These are intended to the expansion joint board a better hold in the luge to convey on concrete. Of course, any barb-like profiling can also be used instead of the barb-like profiling shown other corrugation | or some kind of roughening. The lower part 4 of the tubular hollow body runs out into a point in order to prevent the concrete from breaking through sharp edges and shrinks when it is used to ensure easier insertion of the expansion joint board. Closes to the tubular hollow body, limited through the upper crosspiece 5> the head part 6. This is hollow and has a conical or trapezoidal shape upwardly widening cross-section. The head part 6 connects to the expansion joint board that it is under can only be separated from the rest of the expansion joint board with little effort. For this purpose, the legs of the

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Head part 6 shortly above its attachment to the uppermost transverse web 5, each with a predetermined breaking point (pointed notch) 7 Mistake.

When using the expansion joint board is cemented in its full length and height, as can be seen from the left part of FIG. After the concrete mortar has hardened, a tool is used to grip the headboard from the long side and tear it off along the predetermined breaking point from the rest of the board, which is stuck in the joint due to the barbs. Above the expansion joint board, which has been freed from the head part, one obtains an outwardly appearing joint, which in cross section corresponds to the outer contour of the head part. This joint is now filled with a potting compound 10, resulting in the final state shown in the right-hand part of FIG. 3.

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Claims (2)

Protection claims. 1. Made from an elongated tubular shaped piece with Bjdt crossbars and a barb-like profile
Hollow body existing expansion joint board, thereby
characterized in that this has an easily separable head part 6 delimited by the uppermost transverse web 5 and widening conically or trapezoidally from above. 2. Expansion joint board according to claim 1, characterized in that that on the two extension legs of the conical or trapezoidal head part 6 each one the Separation facilitating predetermined breaking point 7 is provided.