DE146289C - - Google Patents

Description

IMPERIAL A

PATENT OFFICE.

The present invention relates to a method for producing so-called asphalt-cement paving slabs, these are stones, the usable surface of which consists of asphalt, during which lower plate part is formed from cement concrete.

So far, the production of such paving slabs was carried out in such a way that initially the cement concrete and then the rammed asphalt was brought into the press mold, whereupon both masses are exposed to the pressing pressure, 'so united into a single solid body.

According to another known method, such plaster, panels in such a way that a lower layer of earth-moist cement concrete is combined with an upper Layer of heated asphalt powder also by pressing into an inseparable body is united.

The plates produced by both methods suffer from the drawbacks that they firstly, because of their press connection with the lower rigid concrete half, they are not flexible enough remain and thus a large part of the for the upper asphalt surface Losing traffic and so very valuable suppleness for one's own durability and if it becomes necessary to renew the asphalt layer, remove the old one Make wear layer extremely difficult;

On the other hand, when the heated asphalt powder is pressed into the connecting surfaces of the two slab bodies, the hot, bituminous one becomes Asphalt powder quenched by the earth-moist nature of the concrete and made porous and thereby a tight storage and a putty bandage of the. Prevents powder molecules, so the latter are very often only embedded in a gruesome way.

The main disadvantage of both methods is that both plate bodies pressed under the same pressure and combined directly with one another.

It is scientifically known and practically proven that cement concrete slabs. and artificial stones only. through the most extensive, non-porous compression and squeezing the material grains achieve the highest durability, on the other hand the rammed asphalt powder as bituminous or oily building material in its print processing draws those uneven boundaries, which only has a very even molecular density that does not push out the bitumen Guarantee compression.

Asphalt slabs that are pressed too hard lose out on oily binders and thus at the same time estimable elasticity, become too hard and drive their way through traffic to the aspired, uniform and seamless ceiling do not come together.

By pressing both plate parts directly onto one another under uniform pressure not only is the asphalt layer too thick or the cement layer too weak pressed, but it also contributes to the different behavior of the two plates Changes in temperature have no right

Claims (1)

nting worn so that an automatic ■ · Loosening of the bandage is inevitable. Accordingly, the aim of the new method is to counteract an automatically unsolvable To create a mechanically removable association between the two plate parts and to give them the highest possible strength give, which is achieved by the fact that each plate part in the shaping under one ίο reasonable prints made, i.e. 'under such pressure is pressed, which is necessary to the particular used Material to the structure desired to achieve a firm, permanent steities give. .The concrete sub-slab is as far as possible with a goal striving for its' highest durability Prints pressed "for themselves". The upper half of the rammed asphalt slab, on the other hand, is in a special and above all , adapted to weaker pressure and produced by means of a binding and watertight Asphalt adhesives are glued to the concrete surface so that both halves of the slab become one solid, but nevertheless / arbitrarily separable, unitary body are connected waterproof. This connection can be achieved by means of a the well-known Asphaltklcbcmittcl, such as Trinidad asphalt etc., or artificial asphalt, e.g. B. Stcinkohlcn-Fctrolctim-Asphalt, etc., take place. The use of an asphalt block as an intermediate layer between cement blocks Asphalt layer in order to achieve a firm union of these latter layers is known, however; therefore, this feature does not form part of the present invention. The plates are manufactured in such a way that the Zcmcntbctonplattc, which requires the highest pressure, finished pressed and after the previous application of the adhesive layer, the asphalt surface slab is applied under slight pressure is pressed. '45 Godfather ν τ-Α ν SPRU c 11: Process for the production of arbitrarily separable asphalt-cement-pavement- 5 « ; slabs using an asphalt layer that remains elastic as an intermediate layer, characterized in that the plate parts to be united by means of the adhesive are subjected to different pressures be pressed.