JPS6038246B2 - Method for manufacturing water-permeable resin concrete molded body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a water-permeable resin concrete molded body, and is particularly suitable as a method for manufacturing molded bodies used as pavement boards or paving stones on which frictional force acts on the surface.

Conventionally, as described in Tokukan Sho 50-31607, bone village and an additive resin adjusted to such an extent that the surface of the aggregate is coated are mixed, and this mixture is molded to form a water-permeable material. Resin concrete moldings, for example, wooden moldings for water collection pipes, seawall shelves, etc., are being made.
In such a molded body, the aggregates are bonded only at the contact points between the aggregates and are cast on the surface of the molded body, so when external forces, especially frictional force due to walking, etc. are applied, the gaps between the aggregates are The bonding resin undergoes hydrolysis when it comes into contact with water, weakening the adhesive force between the aggregates, and this also has the disadvantage that the bone villages gradually separate from the surface of the molded product, resulting in poor water permeability. It could not be used in applications where frictional force is applied, such as in pavement boards and paving stones. The present invention was made with the aim of solving the above-mentioned drawbacks of conventional water-permeable resin concrete molded bodies and to obtain a water-permeable resin concrete molded body provided with a surface layer having excellent durability against frictional forces. The gist of this is that a mixture of bone villages and a curable liquid resin in an amount that covers the surface of the aggregate and fills some of the gaps between the bone villages is applied to the bottom surface with a large number of protrusions or protrusions. The mixture is placed in a mold provided with a mold, and the curable liquid resin present between the aggregates of the mixture is transferred to the bottom side of the mold to the extent that it does not embed the protrusions or ridges provided on the bottom of the mold,
The present invention relates to a method for producing a water-permeable resin concrete molded body, which is characterized in that it is hardened in a state in which continuous gaps are formed between bone villages.

Therefore, in the present invention, inorganic or organic solid or hollow granules are used as the aggregate, and the particle size ranges from crushed stone, gravel, etc. with a particle size of about 8 willow.
, river sand, camphor sand, etc. can be used as desired, up to a particle size of about 0.5 willow, but those with a particle size smaller than 0.5 grain are not preferred because continuous gaps will be difficult to form between the aggregates. . These granules may be of the same size, but if granules of various sizes are mixed, small granules with a particle size of 4.5 mm may be found between the large granules. This is preferable because it penetrates and is bonded, making it resistant to impact and bending. In addition, as a curable liquid resin,
Thermosetting resins such as unsaturated polyester resins, epoxy resins, vinyl ester resins, etc., with curing agents, curing accelerators,
Catalysts and the like are mixed as necessary.

Further, powder fillers, reinforcing agents, pigments, etc. may be mixed with this resin. In particular, it is preferable to mix a powdery filler such as calcium carbonate because the viscosity of the resin can be adjusted to a value suitable for mixing with aggregate and the amount of resin can be reduced. In the present invention, a mixture of the aggregate and a curable liquid resin is used, and the amount of the curable liquid resin in the mixture is such that it covers the surface of the aggregate and partially fills the gaps between the aggregates. Good to have.

The amount of this curable liquid resin varies depending on the size and distribution of aggregate particles and the thickness of the surface layer to be formed, but for example, the amount of curable liquid resin is 0.5 to 8. When using a material whose particle size is distributed within the range of 8.3 to 15.0, the curable liquid resin is a thermosetting resin. In the case of a thermosetting resin containing a powdery filler such as calcium carbonate in which the curable liquid resin is 5% by weight based on the mother weight, the content may be in the range of 6.2 to 11.9% by weight. If the amount of resin is too small, a uniform surface layer will not be formed, and if it is too large, water permeability will be impaired. In the present invention, a mold having a large number of protrusions or protrusions on the bottom is used, and a mixture of pre-mixed aggregate and hardening liquid resin is poured into the mold, and The curable liquid resin existing in the gaps is transferred to the bottom of the mold to the extent that it does not bury the protrusions provided on the bottom of the mold, and hardens while forming continuous gaps between the aggregates. It forces you.

By transferring the curable liquid resin existing in the gaps between the aggregates to the bottom side of the mold, the gaps between the aggregates and the gap between the aggregates and the bottom of the mold become hardenable on the bottom side of the mold. Filled with liquid resin. On the other hand, continuous gaps are formed between the aggregates on the side where the curable liquid resin existing in the gaps between the aggregates has migrated and disappeared. If the amount of resin and the height of the protrusions or protrusions are determined so that the protrusions or protrusions provided on the bottom of the mold are not buried in the hardened liquid resin that has migrated, the cured molded product will be made of bone. A surface layer hardened with resin is formed between the materials, while grooves connecting to the molded body with continuous gaps between the aggregates are formed in the protrusions (or protrusions) to maintain water permeability. is obtained. A variety of methods can be used to place the mixture in a mold and transfer the curable liquid resin to the bottom side of the mold.

For example, methods of reducing the viscosity of the curable liquid resin by heating to give it fluidity and allowing it to flow down under its own weight, methods of vibrating the mold with a vibrator, etc., methods of applying pressurized air from above the mold This can be carried out by a method in which a mold is placed in a rotating container and transferred by centrifugal force. In the case of heating, it is necessary to heat the curable liquid resin at a temperature lower than the temperature at which it hardens due to the reaction of a catalyst, and to cause the resin to migrate and create gaps between bone villages before the resin hardens. Next, an example of the present invention will be explained with reference to the drawings.

FIG. 1 is a sectional view showing one embodiment of the present invention, in which 1 is a mold, 2 is a mixture of aggregate 21 and curable liquid resin 22, and 3 is a heating furnace.

The mold 1 consists of a bottom plate 11 and a side green 12 surrounding the periphery of the bottom plate 11, and the bottom surface 13 of the bottom plate 11 has a large number of protrusions 1.
4, 14, . . . are provided in a pattern as an example is shown in FIG. The width of the protrusion 14 is preferably 3 to 15 ribs, and the height is preferably about 3 to 1 square. Also, each protrusion 14, 14
... has an even pattern on the bottom surface 13, and the gap is 3~
It is preferable that about 10 protrusions are arranged, and the end of each protrusion 14 may be connected to another protrusion 14. The arrangement of the protrusions 14 is not limited to the example shown in FIG. 2, but may be in a pattern such as a lattice or a tortoise shell, and even if they are not protrusions, they may be arranged in a pattern such as columnar or prismatic protrusions. It may be something that has been done. Then, the mixture 2 is put into the mold 1 and placed in a heating furnace 3 to be heated and hardened.

Next, examples of the present invention will be shown.

Example 1 A molding product with internal dimensions of 30 cm in length, 30 cm in width, and 4 cm in height, and has protrusions 14, 14... (height: 5 ribs, width: 5 willows) as shown in Fig. 2. Type 1 was used, and the composition of the mixture was as follows.

Unsaturated polyester resin (manufactured by Takeda Pharmaceutical Co., Ltd.,
lo flyfish Product name: Polymer 3
308) Penzoyl peroxide (manufactured by Nippon Oil & Fats Co., Ltd., trade name: Nyper-80) 1 part by weight Calcium carbonate (manufactured by Shiraishi Calcium Co., Ltd., trade name: Whitton SB
) 10 parts by weight Cinnamon sand (mixture with a particle size of 0.5 to 8 legs) 50 parts by weight This mixture was placed in mold 1 and pressed from the top to make it flat, and then heated to 10,000 ℃. It was placed in a hot air circulation type heating furnace 3 and cured for 30 minutes.

The molded body taken out from the mold 1 was as shown in FIGS. 3 and 4.

That is, a water-permeable molded substrate 4 in which the aggregates 21 are bonded to each other at their contact points and has continuous gaps between the aggregates, and a water-impermeable surface layer 5 in which the gaps between the aggregates are hardened with resin on one side. Patterned grooves 6 corresponding to the protrusions 14 of the mold 1 were formed in the surface layer 5. This groove 6 communicated with the water-permeable molded body substrate 4, and a molded body that maintained water permeability as a whole was obtained. Then, when this molded body was laid on the ground, even when it rained heavily, water drained from the grooves 6 and water did not accumulate.

The present invention is a method for manufacturing a water-permeable resin concrete molded body as described above, in which a mixture of aggregate and hardening liquid resin is produced using a mold having a large number of protrusions or ridges on the bottom surface. By transferring the resin existing between the aggregates to the bottom side of the mold before hardening, the surface layer has a hardened surface layer where the spaces between the aggregates are filled with resin, and there is no protrusion of the mold. A groove corresponding to the protrusion is formed, and a molded body that maintains water permeability can be made through this groove.
Therefore, it is possible to create a molded body that does not substantially impair the water permeability of conventional water-permeable resin concrete, and does not cause aggregates to separate even when the surface is subjected to frictional force due to walking or the like.

In addition, by selecting the arrangement of the protrusions or protrusions provided on the bottom of the mold, it is possible to form a patterned surface layer on the surface of the molded product, making it possible to create various beautiful patterns used for pavement boards, paving stones, etc. The surface layer can be easily formed on the surface of the molded article.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of the present invention; FIG. 2 is a plan view showing an example of a mold used in the present invention; FIG. 3 is a plan view showing an example of a molded article obtained by the present invention; Fourth
The figure is a sectional view taken along line W-N in FIG. 3. 1: Molding mold, 11: Bottom plate, 12: Side green, 13: Bottom surface,
14: protrusion 2: mixture, 21: aggregate, 22: curable liquid resin, 3: heating furnace, 4: molded body substrate, 5: surface layer,
6: Book. O diagram is Z diagram, spear 3 diagram is Saiko diagram

Claims (1)

[Claims] 1. A mixture of aggregates and a curable liquid resin in an amount that covers the surface of the aggregates and fills some of the gaps between the aggregates is applied to The curable liquid resin existing between the aggregates of the mixture is transferred to the bottom side of the mold to the extent that it does not embed the protrusions or ridges provided on the bottom of the mold, and the mixture is placed between the aggregates. A method for producing a water-permeable resin concrete molded body, characterized by curing it in a state where continuous gaps are formed. 2. The manufacturing method according to claim 1, wherein the aggregate is a mixture of granules having a size of 0.5 to 8 mm. 3. The manufacturing method according to claim 1 or 2, wherein the curable liquid resin is a thermosetting resin mixed with a fine powder filler. 4. Claims 1 to 3, wherein the means for transferring the curable liquid resin to the bottom side of the mold is a method of reducing the viscosity of the curable liquid resin by heating and causing it to flow down by its own weight. The manufacturing method according to any one of the items.