JP2005248556A - Permeable paving material or molding material making use of rubber as basic material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a permeable paving material or a molding material making use of rubber produced by a recycling technique of wastes taking into consideration of an environment from the viewpoint of environmental load and capable of alleviating the exhaustion of ground water. <P>SOLUTION: The permeable paving material or the molding material is made by mixing the crushed rubber waste and blast furnace cement and further, if necessary, artificial aggregate or the like obtained from an additive or plastic waste in a predetermined ratio, adding water and further kneading the mixture, and drying and curing the mixture. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a method for producing a water-permeable pavement material or molded material.

  In modern society, the existence of vehicles as an important means of transportation has become indispensable. Currently, improvements in vehicle performance and road conditions have further spurred the spread of vehicles. As for road conditions, the spread of pavement is a major point, most of which is asphalt pavement or concrete pavement. Contrary to comfortable road conditions, such pavement blocks the penetration of rainwater into the ground and contributes to the depletion and contamination of groundwater.

  On the other hand, a large amount of building waste due to the dismantling and destruction of various buildings has become a major social problem. In some cases, crushing and recycling of demolished concrete, fueling of wood materials, and recycling of metal materials are carried out, but they are limited to limited use, and most are disposed of in landfills. is there.

As these permeable pavement aggregates, attempts have been made to use industrial waste, and effective utilization is expected.
JP 2000-34702 JP 7-279106 A JP-A-7-276386

Of the waste, rubber waste, which is mainly used for car tires, has various problems in the disposal of tires, for example, and if incinerated, air, soil, water pollution and What is thrown into the mountains and causing problems such as offensive odors is a source of pests, and there are serious negative effects on the global environment, such as natural destruction, such as a large number of cases of fires being reported after being left for a long time. It is becoming.
Tires occupying most of the rubber waste are made of rubber, reinforcing metal or synthetic fiber wires, and fiber knitted nets, and these wires and nets are obstructed when used for disposal. It was. In recent years, an apparatus that efficiently separates and pulverizes rubber and wires and nets has been developed, and recycling of waste tires has become easier.

Reuse of synthetic resin waste is advancing, but thermosetting resin is difficult to reuse, and most of it is sent to landfill.
As for road pavement, water permeable asphalt pavement that has a water permeable function and can avoid puddles on the road surface and can easily ensure the safety of automobiles has been adopted in various roads in recent years. Such a water-permeable asphalt pavement has a porous structure in which voids are formed between aggregates using a special aggregate or asphalt. A concrete pavement technique having the same water permeability is also used.

  In the conventional technique, a technique for utilizing rubber as industrial waste as an aggregate is partially disclosed. Most rubber waste is incinerated as a fuel or is a technology that should be highly recommended in view of the fact that it is disposed of in landfills. The main reason is that raw garbage is mixed in and uses are limited.

  Therefore, in the present invention, the crushed rubber lump, the blast furnace cement, if necessary, additives and other aggregates are mixed at a predetermined ratio, added with water and kneaded, solidified and cured, Aggregates that are kneaded together with rubber lumps are widely available pavement or molding materials such as artificial crushed stones or glass wastes made of natural aggregates and plastic wastes.

Since the present invention uses rubber waste that has just been pulverized, the energy consumed for waste treatment is small, and since it is material recycling that does not undergo chemical treatment or heat treatment, there is little increase in entropy, and the environment In addition to environmentally friendly waste recycling technology from the viewpoint of load, it is extremely useful because it can reduce the depletion of groundwater as a permeable pavement and other structural materials. In addition, since natural cement and water are used as binders, they do not contain harmful substances or substances that need to be reprocessed when they are re-disposed. It greatly contributes to society.
In addition, since rubber is used as the main aggregate, it has elasticity and has an impact absorbing effect.

  In order to carry out the present invention, rubber waste is crushed and used in a size of 5 to 20 mm (equivalent to No. 5 to No. 6 crushed stone), preferably 13 to 20 mm (equivalent to No. 5 crushed stone). Good. Those larger than this range have a high porosity after molding and improve water permeability, but are not preferable in terms of strength against load. On the contrary, those smaller than this range are not preferable because the porosity after molding is lowered and sufficient water permeability cannot be secured. This ground rubber waste is mixed with blast furnace cement and water, and if necessary, reinforcing additives and other aggregates. These mixing ratios are selectively blended within a range of 60 to 45% for the rubber pulverized product, 20 to 40% for the blast furnace cement, and 7 to 15% (each by weight ratio) for water.

Hereinafter, preferred embodiments of the present application will be described.
The waste tire is pulverized with an appropriate pulverizer, and aggregates having a particle size of about 10 to 15 mm are used as an aggregate, and blast furnace cement is added thereto and kneaded. At this time, an aggregate made of another material suitable for rubber crushed material, for example, crushed stone obtained by pulverizing natural stone, artificial crushed stone obtained from synthetic resin waste (Japanese Patent No. 3423302, etc.), or crushed glass waste Further, tile waste, ceramic waste, wood waste, slag, other rubber waste, etc. can be mixed as appropriate with a filler or reinforcing material within the range not exceeding the ground rubber crushed material.

  In a kneaded state, it can be stored for several months as long as the aggregate such as rubber is in a sufficiently dry state in an environment where the moisture entry and exit from the outside air can be maintained. That is, it is preserve | saved by maintaining the moisture content of the grade which a blast furnace cement does not solidify.

Water is added to the aggregate of these aggregates and blast furnace cement and kneaded.
The mixing ratio of aggregate, blast furnace cement and water needs to be adjusted depending on the purpose of use and the condition of the paved roadbed, but 60 to 30% aggregate, 35 to 50% blast furnace cement and 5 to 5% water by weight ratio. It can be used effectively in the range of 20%. In particular, the weight ratio differs depending on the content of the aggregate, and depends on the blending ratio of natural stone-based aggregate or synthetic resin-based aggregate.

  When it is used as a paving material, the material kneaded with water is laid on the intended roadbed and then leveled and finished by appropriate means. If necessary, light pressure may be applied. To use for applications other than paving, prepare the mold material as necessary, fill the required amount, confirm that it has solidified sufficiently, take out from the mold material, preferably after curing for several days, It is good to use for the purpose.

  If necessary, when kneading with water, an additive can be added for the purpose of increasing the strength, improving the solidification rate, or increasing the hardness. Can be used. Although the additive varies depending on the type and purpose, about 0.02 to 1% in terms of the total weight ratio can be effectively used.

  Since the product of the present invention is elastic, it can relieve the direct impact load on the human body and animal body, and can reduce damage to the soles and nails of animals, and should be used as a barn for barns. Thus, moisture such as urine can quickly permeate into the lower part of the pavement and the surface can be kept dry, which is effective as a flooring material that is easy on livestock and pets.

  In order to use it as a paving material, it is effective to use it on roads, parking lots, and other similar places. In particular, in places used mainly for traffic such as sidewalks, running courses, and plazas, it is preferable because of its cushioning properties during walking. Since it has water permeability, it can also be used as a herbicide in vacant land, and can be used in consideration of the laying thickness as appropriate. Applications other than paving can be used for various purposes such as various partition blocks, artificial reefs, landscape formation blocks for rivers and lakes, vegetation and vegetation or ornamental blocks, and various building landscape blocks. is there.

In particular, when used as a paving material, the amount used is large and is effective from the viewpoint of waste disposal. Artificial fishing reefs have water permeability, that is, there are many voids, and because seaweed spores are easy to attach and are not easily washed away by the ocean current, seaweeds grow quickly, and if necessary, seaweed spores can be removed. If attached and dumped into the sea, it functions as a fishing reef at an early stage and is extremely effective.

Claims (3)

  A water-permeable pavement characterized by solidifying and curing after pulverized rubber lump, blast furnace cement, and if necessary, additives and other aggregates are mixed at a predetermined ratio, kneaded with water. Or molding material.   The pavement material or molding material according to claim 1, wherein the aggregate kneaded together with the rubber mass is an artificial crushed stone made of plastic waste. The paving material or molding material according to claim 1, wherein the aggregate kneaded together with the rubber lump is waste such as tile, glass, ceramics, slag, wood scrap, rubber scrap other than the rubber lump.