JP3202672U - Water retention block - Google Patents

Abstract

An object of the present invention is to provide an inexpensive water retaining block such as an interlocking block and a floor flat plate that suppresses the evaporation of water and has a long-lasting surface temperature reduction effect. In a water retention block A having a water retention amount of 0.20 g / cm 3 or more, a water repellent having an impregnation layer 3 in which a silicone water repellent is applied or impregnated from the surface 2 to the vicinity of the surface is formed. Apply processing. [Selection] Figure 1

Description

In the present invention, a gap portion such as a capillary tube below the surface of the main body having a water retention amount of 0.20 g / cm ³ or more is 5 mm thick in the depth direction from the surface, and water vapor passes but is wet with water. The present invention relates to a water-retaining block such as an interlocking block or a floor flat plate that has no voids, suppresses the evaporation of water, and has a long-lasting surface temperature reduction effect.

Conventionally, water retention blocks aim to contribute to prevention of urban heat island phenomenon by lowering the temperature of the pavement surface by evaporating the water stored in the block body through the block surface, but existing water retention concrete blocks since water amount of the block body is small (ILB standard 0.15 g / cm ³ or more, typically ^{0.15g / cm 3 ~0.25g / cm 3} , 9mm water retention in the case 60mm thick block of 0.15 g / cm ³ Under the clear weather in summer, about 5 mm / day evaporates), and the evaporation duration is short. Furthermore, since the capillaries in the main body are thick, the surface layer portion is easily dried, and the evaporation surface falls immediately below the surface. In both cases, the effect of reducing the surface temperature does not last long (evaporation on the surface has the highest surface temperature). There is an effect to lower, and if the evaporation surface is lowered by 5 mm, the effect is drastically reduced to 1/4 or less). From the above, the temperature-reducing effect of existing water-retaining concrete blocks is about a day after rain. Therefore, not only is the spread not progressing, but at present, if there is no constant supply of water, the effect will not continue.

Therefore, the inventors have developed a firing block using the unused resource glitter, which is a fine powder, for the purpose of improving the water retention amount (Patent Document 1). The fine powder fired product forms a large number of thin capillaries in the main body, has a large water storage capacity, and has a water holding capacity of 0.25 g / cm ³ or more. A thin capillary tube not only retains water but also absorbs water on the ground side, such as laid sand provided for laying (water moves from the thicker side of the capillary to the thinner side, usually the ground side-laid sand and crushed stone Capillary tube is thicker than this developed product). Since the water in the block body and the water on the ground side can be used together, evaporation on the surface lasts for a long time. If the water retention amount is 0.25 g / cm ³ and the block thickness is 60 mm, the main body is 15 mm and the sand retention amount is about 0.3 g / cm ^3. There is 9mm water storage. Immediately after rainfall, 24mm water storage is possible. If the crushed stone is laid about 100 mm thick under the laying sand, and the particle size-adjusted crushed stone is used for this, the amount of stored water can be further increased. Pavement surface using this appropriate laying sand, the paved surface laying the block surface in the summer, even after four days of fine weather after rain, remains moist, compared to a ceramic block that does not retain water. The surface temperature is low (= temperature reduction effect) at 12 to 7 degrees in midday with strong solar radiation. This is a great effect in itself, but after 5 days, the effect decreases rapidly. I want this effect to last longer. This is the purpose of the present invention.

In addition, in this way, the block having a high water retention amount is originally intended, but the surface is damp and easily wet. Under these conditions, an ice layer with a thickness of about 1 mm may be formed on the block surface under the condition that frost pillars are generated in winter, and it becomes easy to slip. It is also an object of the present invention to solve this.
Furthermore, black mold and algae are generated. Although it is a natural phenomenon, it may be regarded as a problem in appearance and may become slippery due to the generation of algae. It is also necessary to prevent this from getting wet all the time.
Furthermore, there are countless capillary holes on the surface of the higher water-retaining block, which form fine irregularities, which may cause car tire marks to adhere and be difficult to remove. It is also necessary to make this more difficult to adhere.

  The present invention solves these problems all at once. At least 5mm from the surface of the main body, the gap between the capillaries and the like existing in the meantime is treated as a layer that does not wet with water (water vapor passes), and at least the surface is wetted. It is a lost idea.

In order to solve the above-described problems, a method of providing irregularities on the surface and coating the surface with a photocatalyst has been proposed (Japanese Patent Laid-Open No. 2005-48359). (Patent Document 2)
In addition, there is International Publication No. 2006/1229838 as a proposal for preventing the growth of bacteria on the surface by mixing an antibacterial substance into a substrate. (Patent Document 3)
Both of these are useful solutions, but all are expensive materials and are not mentioned in the surface treatment method.

Utility Model Registration No. 3192252 JP-A-2005-48359 International Publication No. 2006/129838

  Although the problems described above are different in the phenomena that are the problems, it is desired to suppress the amount of evaporation from the block surface while maintaining water retention, and to continue the temperature reduction effect due to water evaporation. The purpose is to provide a water retention block that helps prevent urban heat islands in the summer and dry seasons in the winter.

  At the same time, it is necessary to realize a surface that hardly generates algae or slips during walking. It is possible to realize a pavement that is resistant to dirt, does not slip, and that can be made.

  Furthermore, it is possible to realize low cost as well as improving productivity and prolonging the effect.

In summary, urban heat island phenomenon is partly due to the non-water retentive asphalt and concrete pavement, and water retentive blocks are commercially available to prevent it. In the interlocking block, there is a standard for water retention of 0.15 g / cm ³ or more, but at this level of water retention (for example, 0.2 g / cm ³ ), the duration of the summer temperature reduction effect is extremely short. . At most one day after the rain. In order to maintain a damp state even during the summer day even a week after raining, it is necessary to select a laying sand or roadbed with a water retention amount of 0.25 g / cm ³ or more. Most commercial products have a water retention amount of 0.25 g / cm ³ or less, and the temperature reduction effect is small.
The present invention aims to maintain the temperature reduction effect and limit the amount of evaporation at a high water retention amount, and at the same time, solves the problem of dirt and slip that easily occur with a high water retention amount.

Means for solving the idea

The present invention solves such a conventional problem. In a water retention block having a water retention amount of 0.20 g / cm 3 or more, a silicone water repellent is applied and impregnated from the surface to the inside of the surface. This is a water retention block characterized by that.
Thereby, it is a water retention block provided with the function to reduce the amount of water evaporation of the water retention block and to continue the temperature reduction effect. At this time, it is most preferable that the space portion such as a capillary tube below the surface is a space that is 5 mm in thickness from the surface and does not wet with water. It should be noted that even if the impregnation exceeds a maximum thickness of 5 mm from the surface, a greater effect cannot be expected, which is not preferable from the viewpoint of cost and labor.

Effect of device

In a conventional block (conventional product) designed by the inventor with a high water retention amount of 0.25 g / cm ³ or more, the water evaporates on the surface and the evaporation rate is fast. The amount exceeds the normal water evaporation of 5 mm in the summer day, and the temperature reduction effect lasts for 4 to 5 days, but thereafter the effect decreases rapidly. In order to solve this, a layer that is not wetted by water between the thickness of 5 mm at the maximum from the surface (gas can pass through, but if the thickness is 5 mm or more, the effect of the temperature continues for a long time is small). As a result, the evaporation surface is lowered, and the evaporation rate is reduced to about 1/2 of the conventional product (a numerical value for two days of clear weather immediately after the rain), and the duration of the reduction effect is prolonged. Although the water retention amount was 0.25 g / cm ³ or more, according to the present invention, it can be lowered to 0.20 g / cm ³ or more, and the strength can be increased.

  Since the present invention does not wet the surface, it is difficult to get dirty, does not slip, and can be paved. It also helps prevent heat island phenomenon in cities in summer and dryness in winter.

  It is a fragmentary sectional view which shows the Example of this invention.   It is a graph which shows the temperature change based on the Example of this invention.

The present invention will be described according to an embodiment.
FIG. 1 is a partial longitudinal sectional view of a water retention block of the present invention. The water retention block A of the present invention has a surface after molding and firing (ceramic firing system) or after molding and curing (concrete system). Water-repellent treatment is applied to In the water repellent treatment, the impregnated layer 3 made of a silicone water repellent (Polon C manufactured by Shin-Etsu Chemical Co., Ltd.) is applied to the surface 2 of the block body 1 after dilution. The dilution rate depends on the size of the gap water retention block body 1 to be applied when using a 10-fold solution is ^{0.01g / cm 2 ~0.1g / cm 2} .

Hereinafter, preferred embodiments of the present invention will be described.
In the present invention, the impregnated layer 3 is applied to the surface 2 of the main body 1 having a water retention amount of 0.25 g / cm ³ or more so that the permeation thickness exceeds 0.0 mm (surface only) and does not exceed 5.0 mm. Apply.

The urban summer heat island phenomenon is partly due to non-water retentive asphalt and concrete pavement, and water retentive blocks are commercially available to prevent it. The water retention capacity of the interlocking block has a standard of a water retention amount of 0.15 g / cm ³ or more, but with this amount of water retention (for example, 0.2 g / cm ³ ), the duration of the summer temperature reduction effect is extremely short. 1 day after the rain. In order to maintain the effect even during the summer day and even one week after rain, it is necessary to select a sand and roadbed with a water retention amount of 0.25 g / cm ³ or more. Most commercially-available products have a water retention amount of 0.25 g / cm ³ or less, and there are no problems of dirt or slippage, but the temperature reduction effect is small. This is a solution to both, and the duration of the summer temperature reduction effect is prolonged, and there is no problem of dirt or slippage.

As described above, the present invention aims to maintain the temperature reduction effect and lower the evaporation surface directly below the surface, and can simultaneously solve the problem of dirt and slip.
The effect is shown in the surface temperature measurement example of the experimental laying product in the summer of 2015 in FIG. Block A is laid by the usual sand-flooding method. Measure the surface temperature around noon from 1st day to 13th day after the rain (this summer was very hot and sunny), and the temperature difference from the surface temperature of the same color ceramic block without water retention measured at the same time Shows the effect.
“Co-retained product” in the figure is a commercially available concrete-based water retentive block. While the effect of “conventional product” sharply decreases from the 4th day, the “water-repellent product” that is a layer that does not wet with water between the thickness of 1 mm from the surface does not show the initial high effect. The effect of about 6 degrees continues stably. A commercially available concrete-based water retaining block does not show a reduction effect.

When the effect lasts in this way, in the conventional product, the water density of the main body is secured to be 0.25 or more for the purpose of sustaining, so the bulk density and the water retention amount are inversely proportional within the range allowed by the strength. Although it was devised to reduce the bulk density, the bulk density was set to 1.8 g / cm ³ , but it was also possible to increase it to about 2.0 g / cm ³ , which was advantageous in terms of strength. In addition, the water retention amount was advantageously 0.2 g / cm ³ or more.

  Furthermore, in addition to the temperature reduction effect, it also has the effect of preventing surface dirt (dust adhesion, generation of mold algae), slippage due to freezing of the surface, etc., and provides a water retention block that is extremely useful in addition to its beauty. It became possible. Of course, even if the water-repellent effect is lost due to aging as necessary, it can be reproduced by recoating.

  The present invention is used in the industry for manufacturing water retaining blocks.

A Water retention block 1 Water retention block body 2 Surface 3 Impregnation layer

Claims (2)

  A water retention block having a water retention amount of 0.20 g / cm 3 or more, wherein an impregnation layer in which a silicone water repellent is applied or impregnated is formed from the surface to the vicinity of the surface.   The water retention block according to claim 1, wherein the impregnation depth of the impregnation layer is 5 mm or less.