JP2001269058A - Vessel for storing rain water, and water-retaining material utilizing waste material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize a waste formed when producing an artificial light-weight aggregate. SOLUTION: A melted and attached material attached to a wall surface of a rotary kiln without being formed into granules when firing expansive shale is crushed by a drill to provide a crushed lumps in proper shapes. The crushed lump has 0.8-1.7 specific gravity, and can adsorb fine particles because the crushed lump has open pores providing >=25% porosity and has an water- purifying effect. The crushed lump can be used as a filler 1 for a storing vessel 10 of rain water because the lump can preserve water for a long period. Further, the lump is optimum as a water-retaining material 1 for a plant because the crushed lump has pH 6.5-8.6 which is same as that of a natural lava. The lump which is the waste material at the time of production of the light-weight aggregate can be effectively utilized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for utilizing waste generated in the production of artificial lightweight aggregates, and more particularly, to a rainwater storage tank and a water retention material utilizing waste, and water retention using the water retention material. Method, planter.

[0002]

2. Description of the Related Art Artificial lightweight aggregates are manufactured by firing crushed expansive shale in a rotary kiln at 1000 to 1250 ° C. The surface is coated with a thin film and the inside thereof has numerous micropores. It is a granular material having. In the process of producing artificial lightweight aggregate, expandable shale that is not granulated melts and adheres to the wall of the rotary kiln, and this molten deposit absorbs a large amount of water because the surface becomes unporous and continuous pores, It could not be used as aggregate for concrete, but was only disposed of as industrial waste or used only as backfill material.

[0003]

The waste generated during the production of artificial lightweight aggregates may increase with the increase in demand for artificial lightweight aggregates. Disposal as waste remains unresolved,
There is a demand for the development of technology that effectively utilizes this waste.

[0004]

Means for Solving the Problems In the production of lightweight aggregates for firing expansive shale, continuous porosity is formed in the crushed mass of molten deposits that adhere to the wall of the rotary kiln without being granulated. It has a water purification ability by adsorbing water and has a water retention function, so it was filled into a cavity formed in the ground to form a rainwater storage tank.

[0005] Further, the molten deposit has a smaller pore diameter than natural porous materials and has a large water-absorbing power due to capillary action, so that it is difficult to dry and can retain moisture for a long time, Since it has the same pH as lava, it is suitable as a water retention material for plants. Also, planting holes were provided to make planters because organisms such as moss grow easily on the surface.
Further, the crushed masses of the molten deposits were closely arranged and fixed, and the crushed products were filled in the gaps to form a water retaining material having a predetermined shape.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION When an artificial lightweight aggregate is manufactured by using an expansive shale as a raw material and firing at 1000 to 1250 ° C. in a rotary kiln at 20 to 60 rpm, the wall of the rotary kiln has a thickness of several tens to several meters. A molten deposit layer is formed. Since the surface portion of the molten deposit layer is solidified and has a low porosity, the molten deposit is crushed and, except for the surface portion, has a porosity of 25% or more from the inside and has a specific gravity of 0.1%. 8-1.7 is used.

[0007] A crushed product of a molten deposit of 20 to 30 mm was filled in a cavity formed in the ground to form a rainwater storage tank. The rain collected on the roof of a building or on the ground is collected, guided to a rainwater storage tank, and stored. The stored water penetrates underground to recharge the groundwater, conserve the underground ecosystem, and secure the normal water of the river. It purifies stored water and can be effectively used for toilets and park fountains.

[0008] A water retention material having a porosity of 25% or more, a specific gravity of 0.8 to 1.7, and a pH of 6.5 to 8.6, which is a melt deposit, is used. This water retention material is placed under and / or around the roots of the plant. In the case of a row of trees, they are installed under and / or around the roots, and are further installed on the ground surface around the trunk of the row of trees to keep the surrounding soil moist for a long time. Fill the bottom of the pot or planter with water retention material and use it. Alternatively, planting holes are provided in an appropriate size and used as a planter.

A plurality of blocks of molten deposits are closely arranged and fixed, and a gap is filled with a pulverized product of the molten deposits, whereby a water retaining material having an arbitrary shape can be formed. Since the shape is constant, it is easy to handle and can be used for retaining water on slopes. As a fixing method, there are a method of bonding the contacts with an adhesive, a method of fixing the outer periphery of the collected water retaining material by a wire, and a method of connecting with a reinforcing bar. As the adhesive, cement, an organic or inorganic adhesive can be used, and an epoxy resin adhesive is preferable.

[0010]

EXAMPLE 1 As shown in FIG. 1, a cavity (15.times.1) was formed in the ground.
A permeation tank 11 and a concrete inner tank 12 (length 1.5 × width 2.8 × depth 1.8 m) were provided at 5 × 2.7 m depth to form a rainwater storage tank 10. A rainwater inflow pipe 13 from a building or the like is provided above the infiltration tank 11 and the inner tank 12, and a water pipe 14 connected to a fountain is provided at the bottom of the inner tank 12. In the infiltration tank 11 and the inner tank 12, expandable shale is placed in a rotary kiln (4
0 rpm, sintering temperature 1150 ° C.), the melted deposit on the wall surface produced during the production of the artificial lightweight aggregate is crushed with a drill, has a porosity of 25% or more from the inside of the adhered layer, and has a specific gravity of 0. Select a crushed mass of 20 to 30 mm at 0.8 to 1.7,
Filler 1 was used. Rain falling on the roof of the building is collected, flows into the infiltration tank 11 and the inner tank 12 through the inflow pipe 13, and is purified while penetrating the gaps and holes of the filler 1.
It penetrates underground from the infiltration tank 11 to recharge groundwater. The rainwater stored in the inner tank 12 is guided to a fountain by a water pipe 14 and used.

Example 2 An expansive shale was baked in a rotary kiln (40 rpm, sintering temperature 1150 ° C.) to produce an artificial lightweight aggregate. A mass water retention material 1 having a specific gravity of 0.8 to 1.7 and a pH of 8.0 was obtained. As shown in FIG. 2, the water retention material 1 was spread under the roots of the row of poplar trees 2 and on the ground surface around the trunk. Since the water retention material 1 is a porous material having a plurality of pores, the water retention material 1 absorbs water at the time of sprinkling or rain, and retains the water for a long period of time. After watering, the water absorbed by the water retention material can supply moisture to the soil for a long time. Moss grew on the water retention material on the ground surface after 4 months, and it was observed that the poplar grew more vigorously than the poplar without the water retention material.

Example 3 A massive water retention material 1 having a continuous space of 25% or more on the same surface as in Example 2, having a specific gravity of 0.8 to 1.7 and a pH of 8.0, and a flowerpot having a height of 30 cm and a diameter of 20 cm 3 is spread from the bottom up to 15 cm from the top, the water retention material 1 is mixed with the soil 4 and further spread 15 cm. Next, a hibiscus 2 having a height of 50 cm was spread over the roots and placed in the flowerpot 3 as a plant that would have reduced water content, and the soil 4 was placed so as to cover the roots (see FIG. 3). When water was sprayed on the flowerpot, the water retention material absorbed the water. For comparison, the hibiscus without water retention material had its leaves wilted and drooped on the fifth day, but the one of the present invention was kept moist for 15 days and grew without wilting.

Example 4 A mass of water retention material 51 having a continuous space of 25% or more on the same surface as in Example 2, having a specific gravity of 0.8 to 1.7 and a pH of 8.0 is closely arranged in a mold, and a gap is provided. Is filled with a crushed material 52 of a water retention material,
A rectangular parallelepiped water retaining material 5 shown in FIG. 4 was obtained by molding with an epoxy resin. As shown in FIG. 5, this water retention material 5 is applied with a gradient of 1: 1.
Was installed directly on the slope 6. The surrounding area became moist, small animals and insects began to inhabit the space, plants grew, and runoff of the topsoil was prevented.

Example 5 FIG. 6 shows the same surface as that of Example 2, having continuous voids of 25% or more, specific gravity of 0.8 to 1.7, and pH 8.0 of 30 cm in length and width.
The planter 7 in which the planting hole 71 was provided in the water retention material of No. 1 was created. A cedar bonsai 2 was planted in the planting hole together with the soil. The moss grew over the periphery of the planter, giving the viewer a feeling that the plants planted in the planter were growing in a natural state, and also created a refreshing and relaxing atmosphere.

[0015]

According to the present invention, since the molten deposits disposed at light-weight aggregate factories scattered throughout the country are used as raw materials, the amount to be disposed can be reduced, and this can greatly contribute to environmental conservation. . Since the molten deposit has a water purifying ability to adsorb fine particles together with a water retention function, it can be used as a filler for a rainwater storage tank. Rainwater purified in the rainwater storage tank penetrates into the ground to recharge groundwater, conserves underground ecosystems, and is also supplied to rivers to prevent drought.

Continuous pores are formed on the surface of the molten deposit. These pores are smaller in diameter than a natural porous material and have a greater water-absorbing power due to capillary action. Can be used as a water retention material. The porous water retention material obtained from construction sludge described in JP-A-6-279145 has a low pH and is not suitable for growing plants. In contrast, the present invention has a pH equivalent to that of a natural porous material, so that it has no adverse effect on plant growth,
Ideal as a water retention material for plants. Lava, pumice and valley stone, which are natural porous materials, are collected in limited areas and transported far away from the collection area, while waste from lightweight aggregate factories scattered throughout the country. As a raw material, the cost is low.

[0017] Since the molten deposit does not shrink in volume due to water absorption or evaporation, it is possible to prevent soil compaction due to repeated watering and evaporation and prevent damage to plant roots.

The cuboid water-retaining material in which the melted deposits are closely arranged and fixed and the pulverized material is filled in the gaps has a uniform shape, so that it can be easily handled and workability can be improved.

The planter in which the planting hole is provided in the molten deposit is kept moist at all times, and moss and ferns grow on the outer periphery of the planter, and the plants planted in the planter grow in a natural state. The taste can be given to the viewer, and a refreshing feeling and a relaxing atmosphere can be created.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a rainwater storage tank.

FIG. 2 is a conceptual diagram installed in a row of trees.

FIG. 3 is a conceptual diagram used for a flowerpot.

FIG. 4 is a plan view of a water retention material formed in a rectangular parallelepiped shape.

FIG. 5 is a conceptual diagram used for a slope.

FIG. 6 is a conceptual diagram used for a planter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filler / water retention material 10 Rainwater storage tank 11 Infiltration tank 12 Inner tank 13 Rainwater inflow pipe 14 Water pipe 2 Plant 3 Flowerpot 4 Soil 5 Rectangular water retention material 51 Water retention material 52 Crushed material 6 Slope 7 Planter 71 Planting hole

Claims (9)

[Claims] 1. A rainwater storage tank in which a crushed mass of expansive shale adhering to a wall surface is formed in a ground formed in the ground when expansive shale is fired by a rotary kiln to produce an artificial lightweight aggregate. . 2. The rainwater storage tank according to claim 1, wherein the molten deposit has a porosity of 25% or more and a specific gravity of 0.8 to 1.7. 3. A water retention material obtained by sintering expansive shale in a rotary kiln to produce an artificial lightweight aggregate and crushing the molten deposit of expansive shale adhered to the wall surface. 4. The water retention material according to claim 3, wherein the molten deposit has a porosity of 25% or more and a specific gravity of 0.8 to 1.7. 5. The method according to claim 3, wherein the molten deposit is pH-adjusted.
A water retention material that is 6.5 to 8.6. 6. A water retention material in which the water retention material according to claim 3 is closely arranged and fixed, and a crushed water retention material is filled in a gap. 7. A water retention method comprising installing the water retention material according to any one of claims 3 to 5 below and / or around a root of a plant. 8. A water retention method comprising installing the water retention material according to any one of claims 3 to 6 on a ground surface around a tree trunk. 9. A planter having a planting hole in the water retention material according to claim 3.