JPH04139081A - Production of flat native stone board - Google Patents

Abstract

PURPOSE:To obtain flat native stone boards having fine appearance, hardly slipping property and high water permeability by forming a three-layered body with a layer of a mixture of stones with polymer cement as the middle layer, cutting the middle layer into two in the thickness direction and subjecting the cut sections to coating with resin or polishing. CONSTITUTION:A mixture of crushed stone 3 with polymer cement 4 is charged to a mold 1 to form a first layer (uniformalizing bed) 2 of a thickness T1. A mixture of stones 6 with polymer cement 7 is then charged to form a water permeable concrete layer of a thickness T2 as a second layer 5 on the layer 2. A third layer 8 is further formed in the same way as the layer 1, the layers 2, 5, 8 are hardened in one body by hardening the cement 4, 7, the hardened body is released from the mold 1 and the second layer 5 is cut into two in the thickness direction. The cut sections are coated with resin or polished.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing natural stone slabs to be laid, for example, on sidewalks.

[Prior Art] Concrete plates are generally used as pavement slabs, but natural stone slabs such as granite are used in places where landscape is important.

[Problems to be Solved by the Invention] However, natural stone slabs have problems such as being expensive, slippery, loose, and having low water permeability.

An object of the present invention is to provide a method for manufacturing an inexpensive natural stone slab that is beautiful, hard to slip, and has good water permeability.

[Means for Solving the Problems] According to the present invention, polymer cement or the like is mixed with crushed stone,
The mixed material is poured into the formwork and compacted to form the first layer.Next, the natural stone blocks are mixed with polymer cement, etc., and the mixed material is poured into the first layer in the formwork. A second layer is formed by pouring and compacting the crushed stone, and a mixture of the crushed stone and polymer cement is poured onto the second layer in the formwork and compacting to form a third layer. After the first layer, second layer, and third layer have been formed and the polymer cement etc. has hardened and the first layer, second layer, and third layer have hardened together, the integrated three-layer body is taken out from the mold, and the three-layer body that has been taken out is Said second
The central plane of the layer is cut, and the cut surface is coated with resin or polished.

The crushed stone has a weight percentage of, for example, 81.7% and a particle size of, for example, 5 to 2. 5 mm of ordinary crushed stone is used, and the weight percentage of the polymer cement is, for example, 12.5% of polymer cement, 4% of water, and 1.3% of resin is used, and the thickness of the first layer is, for example, 1. ．． It is preferable to form it to about 5 am.

In addition, for the natural stone blocks, waste materials with a weight percentage of, for example, 77.4% and a particle size of, for example, 50 to 5-5 are used, and for polymer cement, for example, polymer cement with a weight percentage of 12.5%, 6.2%, etc. % of silica sand, 2.7% of water, and 1.2% of resin, and the second layer is preferably formed to have a thickness of, for example, about 7 an.

Further, it is preferable that the third layer is formed in the same manner as the first layer, and the thickness of the three-layer body is, for example, approximately 8 to 12 al11.

[Function] In the above-described method for manufacturing a natural stone flat plate, the outline of a relatively large natural stone with a maximum grain size of about 5QIl, for example, is clearly formed on the cut surface, and is further made beautiful by resin coating or polishing.

Moreover, it is therefore possible to obtain good water permeability and less slippage.

[Example] The present invention will be described in detail below with reference to the drawings.

In FIG. 1, first, a first layer, that is, a leveling bed 2 having a thickness T1 of, for example, about 1°5 ann is formed in a formwork 1 having a negative side of, for example, about 30 to 50 ann.

This leveling bed 2 is made of, for example, 81.7% by weight of ordinary crushed stone 3 having a grain size of, for example, 5 to 2.5m, and 81.7% by weight of ordinary crushed stone 3 having a grain size of, for example, 12.5m.
Mix 5% polymer cement, 4% water, 7.3% resin, etc. 4 (shown in white in the drawing), pour the mixture into formwork 1, and use a roller compactor or Compact and form using a vibrator.

Next, on the leveled floor 2, a second layer, that is, a natural stone water-permeable concrete layer 5 having a thickness T2 of, for example, about 70 mm is formed. This natural stone water-permeable concrete layer 5 includes natural stone small blocks 6 having a weight percentage of, for example, 7764% and a grain size of, for example, 50 to 5 mm.
and a polymer cement with a weight percentage of e.g. 12.5%, 6
．． 2% silica sand, 2.7% water and 1.2% resin etc. 7 (
(shown in white in the drawing), the mixed material is poured onto a leveling bed 2, and compacted using a roller compactor or vibrator. In addition, natural stone blocks 6
It is preferable to use waste materials obtained when making stone products from natural stone blocks.

Next, a third layer 8 similar to the leveled floor 2 described above is formed on the natural stone water-permeable concrete layer 5, and the overall thickness T is finished to, for example, about 8 to 12 an.

Once the cement etc. 4.7 has sufficiently hardened and the leveled floor 2, natural stone permeable concrete layer 5 and third layer 8 have hardened together,
The three-layer body A is taken out from the formwork 1.

Next, as shown in FIG. 2, the three-layer body A taken out was
Cutting the center plane C of the natural stone water-permeable concrete layer 5,
The thickness or TO shown in FIGS. 3 and 4 is, for example, 4 to 6 ao.
Further, a resin (not shown) is applied to the cut surface B1 of the natural stone flat plate B, or the cut surface B1 is polished. As a result, the contour 6a of the natural stone block 6 is clearly formed into a cut surface B1, and the cut surface B1 is made into a beautiful wet-like surface by resin, or made into a beautiful surface inherent to natural stone by polishing.

[Effect of the invention] As explained above, according to the present invention, the maximum particle size is 50 m
The outline of the natural stone block of m is clearly formed on the cut surface, and
The beauty of natural stone can be maximized by resin painting or polishing.

Also, because the grain size of natural stone is large, it is difficult to slip.

Moreover, therefore, good water permeability with a water permeability coefficient of about 1×lO minus square can be obtained.

Furthermore, since the natural stone blocks are made from waste materials, they can be provided at low prices.

You can also create something even more beautiful by mixing red, white, and black natural stone blocks.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing the state of forming a three-layer structure according to an embodiment of the present invention, FIG. 2 is a side sectional view showing the state at the time of cutting, and FIG.
The figure and FIG. 4 show the obtained natural stone flat plate, and are a side sectional view and a top view. A...Three-layer body B...Natural stone slab B1...
Cut surface C...Central plane 1...Formwork 2...
・Leveled floor 3... Crushed stone 4... Polymer cement, etc. 5... Natural stone permeable concrete layer 6...
・Natural stone blocks 7- Polymer cement, etc. 8-
...Third layer patent applicant Kashima Road Co., Ltd.

Claims (1)

[Claims] The crushed stone is mixed with polymer cement, etc., and the mixture is poured into a mold and compacted to form the first layer.
Mixing polymer cement or the like with natural stone small blocks, pouring the mixture onto the first layer in the formwork and compacting it to form a second layer, and further adding polymer cement or the like to the crushed stone. The mixture is poured onto the second layer in the formwork and compacted to form a third layer, and the polymer cement etc. hardens to form the first, second and third layers. After the integrated three-layer body is cured, the integrated three-layer body is taken out from the mold, the central plane of the second layer of the three-layer body that has been taken out is cut, and the cut surface is painted with resin or polished. A method for manufacturing natural stone slabs.