KR20020023907A - A improved method of soil-paving for environment - Google Patents

Abstract

PURPOSE: A pavement method of eco-friendly improved soil is provided to pave improved soil eco-friendly and economically by improving water permeability, stability and stiffness. CONSTITUTION: The pavement method of eco-friendly improved soil comprises the steps of: forming a surface course and a foundation by mixing 20-500 kilogram cement and a 0.8-3 kilogram cement hardener per 1 cubic meter of soil, then lumping soil together; and applying pressure to the surface course and the foundation, then tamping to form a strong and hard pavement foundation.

Description

{A improved method of soil-paving for environment}

The present invention relates to an environmentally friendly soil and a pavement construction method using the same, and more particularly, by using natural soil in the surface layer or base of playgrounds, stadiums and trails, roads, etc. By utilizing the soil's outstanding characteristics and using this soil, it is possible to construct eco-friendly natural soil pavement in a short time more easily by adding and mixing soil improver and solidified material suitable for various uses. It is about a method.

Pavement works such as playgrounds of various sports facilities, park trails, sidewalks, cultural sites, etc., which are frequently used by people, are most desirable in terms of natural scenery. It is not easy and it is difficult to use it as it is because of the permeability and stability of the natural soil.

For this reason, the conventional methods of paving for these are concrete paving, asphalt paving, improved aggregate paving using gravel or crushed stone as paving materials, and paving techniques for solidifying soil by mixing soil with a large amount of cement and soil hardener. It has been used until.

However, while concrete and asphalt pavement methods are recognized to be excellent in strength and maintenance, they are not suitable for the above-mentioned purposes in terms of walking, safety, permeability, and natural compatibility, ie, places that people frequently use or natural scenery. .

In addition, the improved aggregate packaging method is excellent in walking and safety, but has a disadvantage in that it is inferior in terms of maintenance, construction and economics.

In addition, although the soil topping or solidifying agent that has been recently used for the above-mentioned pavement, the concrete pavement method for mixing and packing soil and a large amount of cement is similar to the present invention in that it uses soil, but the concrete Expansion joints are required according to the new construction, and there is a problem that the likelihood of cracking due to unequal settlement and permeability is poor.

Therefore, in order to improve the soil that meets the purpose of natural soil pavement, it is recognized that the proper use of appropriate soil improvers and hardeners according to field conditions and various soil tests, and the proper mixing and construction methods of soil improvers are very important. The invention has been invented.

The present invention is to solve the problems of the prior art as described above, the object of the present invention is to improve the soil suitable for walkability, safety, permeability and natural compatibility by appropriately mixing the cement and cement hardener, etc. Bonding to form voids and foundations between particles, and to pressurize and compact the foundation to create a solid surface foundation with a permeable layer, improving the permeability, stability and strength of the natural soil, thereby improving the environment-friendly and economical pavement It is to provide a construction method.

Hereinafter, preferred embodiments of the present invention will be described.

The present invention is to mix the soil and cement and cement hardener, such that the soil is monolithic to form all the surface layer, the base.

First, the soil is preferably a soil of soil such as sandy soil, shielded clay, clay, etc. containing 30 wt% to 40 wt% of a shield or clay powder having a particle diameter of 70 μm or less.

Since the shield or clay powder is a natural substance, the particle diameter is less than 70 μm and the minimum range is not limited.

As the content of the remaining 60% by weight to 70% by weight of the soil, for example, sand or scum of about 25 mm to about 25 mm in particle size may be mentioned.

Although there is no problem even if some rubble is mixed in the soil, it is not preferable in the soil or sand field where a large amount of rubble is contained, since the effect of sufficient permeability and strength is difficult to be obtained in the natural soil packing method of the present invention.

In the case of such unfavorable soil, it is good to bring in the soil which can be used from near the construction site.

On the other hand, the cement used in the present invention refers to an inorganic material that exhibits curability when kneaded with water, and is not limited to portland cement in consultation.

Specific examples of the cement include, but are not limited to, for example, single cement or mixed cement such as portland cement, natural cement, alumina cement, slag cement, blast furnace cement, lime, gypsum, magnesia cement, and the like. Among them, Portland cement, which is widely used as a cement, is preferable in that it is easy to purchase.

The cement hardener used in the present invention is not particularly limited as long as it promotes and hardens the reaction of the above-described cement, and any one can be used.

A water-soluble inorganic salt composition is mentioned as one of such cement hardeners.

As a specific example of the water-soluble inorganic salt composition, a water-soluble inorganic salt composition containing 10% to 30% of one or two or more kinds of water-soluble inorganic chlorides such as potassium chloride, sodium chloride, magnesium chloride, calcium chloride, aluminum chloride and iron chloride is particularly preferable.

As the hygroscopic inorganic salts, inorganic chlorides such as calcium chloride, magnesium chloride, aluminum chloride and iron chloride are particularly preferred, but calcium embrittlement, magnesium embrittlement, aluminum embrittlement, calcium iodide, magnesium iodide, calcium acetate, magnesium acetate, aluminum acetate and the like can also be used.

As a cement hardener, when water-soluble inorganic salt compositions containing 40% to 60% of one or two or more types of water-soluble inorganic chlorides and 10% to 30% of one or two or more types of hygroscopic inorganic salts are used, Particular preference is given to the fact that the bonding proceeds rapidly, resulting in a grain of soil having sufficient strength.

In the case where the cement hardener is used as an aqueous solution or the like, it is preferable to use an aqueous solution having a solid content concentration of 10 to 40%. In particular, when the drying of the soil is remarkable, it is preferable to increase the solid concentration or to use it as powder.

Soil and cement and cement hardener having the above conditions are mixed and packaged as follows.

That is, the amount of cement mixed with the soil varies depending on the soil's soil, etc., but it is about 20 to 500 kg for 1 ㎥ of soil, and about 60 to 200 kg is appropriate.

If the amount of cement is 20 kg or less, it is not preferable because sufficient single bond is hardly obtained, and even if it is used more than 500 kg, it is difficult to expect the improvement of the effect and unnecessary materials are used.

In addition, the cement hardener to be mixed with the soil and cement is suitable to be 0.8kg ~ 3kg for 1 ㎥ of soil.

The order and method of mixing the soil with cement and cement hardener are not particularly limited, and among the mixture of cement and cement hardener with soil, one of the cement hardener and the remaining one of the cement may be mixed. And the cement hardener may be mixed at once, or the cement and the cement hardener may be mixed from the beginning, but the soil may be mixed. For example, when the natural soil pavement is formed, the cement is mixed with the soil to be paved by a tractor or the like. It is preferable to spread | disperse a hardening | curing agent as aqueous solution etc. and to mix it again with a tractor etc. at the point which makes grain of a grain uniform.

The mixture of the soil thus prepared with cement and cement hardener is ground-based, with a single bond of soil and of some strength.

However, in this surface-based base, since there are many voids and low density, the single-bond bonding by cement is not sufficient, and it is not satisfied in terms of strength, etc., so that the surface-based pressure is fully compacted to promote the reaction of cement and cement hardener. To form a strong, rigid surface layer.

There is no particular limitation on the method of applying pressure to the surface layer, and a method of selecting a method that can completely compact the foundation is almost uniform.

As a specific example of such a method, the method by the machine equipment, such as the voltage by a roller, the blade of a backhoe, and the method of using a wood compactor by hand or a hand roller, etc. are mentioned.

There is no particular limitation on the pressure when the surface layer is completely compacted, and the above-described surface layer may be appropriately selected depending on the degree of compaction or the ground condition.

As thickness of the surface layer formed, about 10-100 cm is preferable.

If the thickness is less than 10 cm, cracks are likely to occur, and impacts cannot be coped with, and the surface layer is not sufficient.

Moreover, even if it exceeds 100 cm, since the effect as a surface layer does not change, only a material is wasted.

However, in the case of soft soils, the thickness of the surface layer is preferably thick.

Surface-based curing periods vary depending on various conditions such as soil dryness, thickness of the foundation and climate, but are sufficient for 1 to 10 days.

The feature of the present invention is that soil (natural soil) is used as the main material of the pavement surface layer, which makes it possible to form a natural and scenic pavement.

In order to use the soil for packaging, “The cement and cement hardener are mixed with the soil, and the soil is monolithically bonded to form voids. In the later process, the cement and cement hardener are reacted by applying pressure to the soil obtained by the single bond. It is necessary to accelerate the process to form a strong and rigid packaging base.

In the present invention, compacting by applying pressure to the monolithic soil is an indispensable process because it is possible not only to reduce the pores obtained in the previous process but also to strengthen and strengthen the pavement surface foundation.

As described above, the present invention is economical by improving the soil according to the purpose using soil as the main material, and secures walking and safety by forming a solid surface foundation and permeability in pavement, and complements construction, economical efficiency, and maintenance. By greatly improving permeability, natural suitability and elasticity, it can greatly contribute to landscaping and pavement work that requires emphasis on natural scenery such as playgrounds, stadiums, parks, and parks and cultural sites of various sports facilities. It works.

Claims (6)

A method of paving eco-friendly soil, characterized in that to form a surface layer, a base by combining the soil 20 ~ 500kg and cement hardening agent 0.8kg ~ 3kg per 1m 3 of the soil to form a surface layer. The method of claim 1, wherein the surface layer and the foundation are pressed to form a strong and hard pavement foundation. The soil according to claim 1, wherein the soil is selected from sandy soil, shielded clay, and viscous soil containing 30 wt% to 40 wt% of shield or clay powder having a particle diameter of 70 µm or less, and about 25 mm at a particle diameter of 70 µm or more. Environmentally improved soil pavement method, characterized in that contained in the range of 60% to 70% by weight of the soil as sand or rubble. The method of claim 1, wherein the cement is selected from one of Portland cement, natural cement, alumina cement, slag cement, blast furnace cement, lime, gypsum, magnesia cement, or a mixture of these to improve the environmentally friendly soil. Package construction method. The water-soluble inorganic salt according to claim 1, wherein the cement hardener is a water-soluble inorganic salt composition containing 10% to 30% of one or two or more water-soluble inorganic chlorides of potassium chloride, sodium chloride, magnesium chloride, calcium chloride, aluminum chloride, and iron chloride. Environmentally improved soil pavement method characterized in that the composition. The method of claim 1, wherein the cement hardener is a hygroscopic inorganic salt, characterized by calcium embrittlement, magnesium embrittlement, aluminum embrittlement, calcium iodide, magnesium iodide, calcium acetate, magnesium acetate and aluminum acetate. Construction method.