(57) This invention aims to the production of new products from decorative rocks, that
will be free from two serious disadvantages of the natural products, the great specific
weight and the low flexural strength, also much improving the economical result of
the production, because the rendering of the marble blocks-granite blocks is over
the double.
The new products will be large slabs or also thin (5- 7 mm) tiles (module marble and
module granite), that will be covered and reinforced on one face with substances giving
them increased strengths, a decreased water absorption and a safe anchorage to the
building elements.
More particularly, this invention solves mainly the problems of cutting of the decorative
rocks (marbles* and granites**) into very thin slabs (5- 7 mm). The method of this invention has
nothing common which that used to the produc- tionof thin tiles, measuring 15 x 30
x 0.7 cm .as it refers to the possibility of production of large and thin slabs (e.g.
155 x 320 x 0.5 cm).
* marbles are crystalline or granular compact rocks, consisting of minerals with ahardness
of 3-4 of the Mosh scale (calaite, dolomite, serpentine), that can be cut, grid and
polished, used as decorative and building materials.
* * granites are phanerocrystalline compact rocks, consisting of minerals with hardness
6-7 of the Mosh scale (quartz, feldspar, feld- spathodis) that can be cut, grid and
polished, used as decorative and building materials.
Furthermore, this invention solves the problem of the reinforcement of slabs with
resin glass-fibers or also resin glass-clothes, which, as they are hydrophobe materials,
the slabs should be completely free from dampness.
The additional increase of the inflexibility of the slabs was achieved by the use
of enlarging materials (e.g. polyurethane). The self-anchorage of the slabs is realized
by depositing of gravel to the still fresh surface of the resin glass-cloth.
The reinforced slabs produced within the frame of this invention are much more lighter
(16-20 kg/m2), in comparison with the natural slabs 2 cm thick (55 kg/m2) and they can be much longer without being broken.
Finally it should be noted that each square meter of reinforced slabs is charged totally
with the sum of US $ 6.00 (prices of 1986), which sum is covered by the over than
the double rendering (from 1 m3 of marble-block or granite-block the theoretical production is 40 m2 of slabs, 2 cm thick or more than 83.3 m2 of reinforced slabs 0.5 รท 0.7 cm thick).
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