KR100258134B1 - Method for paving road using construction waste products - Google Patents

Abstract

PURPOSE: Method for paving a road using a construction waste is provided to remove shortage of an aggregate by recycling concrete waste divided among the construction waste as road paving finishing material or sub-base in paving the road. CONSTITUTION: Method for paving a road is comprises a first process separating concrete waste using as an aggregate from construction waste; a second process transferring the concrete waste to road paving layer or sub-base after crushing with a specific size; a third process applying solidifying material aqueous solution melting water of 10L and solidifying material of 1kg into cement mixture inserting concrete waste of 1700kg and cement 160kg; a forth process establishing the cement mixture on the road with an established thickness; a fifth process leveling the road with a dozer in measuring level; and a sixth process entirely compacting by a vibration roller.

Description

Road paving method using construction waste

The present invention relates to a road paving method using building waste, and in particular, to allow the separated building waste to be recycled as an auxiliary base or road paving finishing material of the pavement target road.

In general, when paving a road, a base layer having a constant height is necessarily formed, and a large amount of aggregate such as sand and gravel is required to form a base layer and a paving layer.

On the other hand, in recent years, large-scale multi-unit houses are being constructed to improve the residential environment and the housing supply rate, and aggregates are insufficient due to the large amount of aggregate required to expand the roads and paving works to improve the traffic environment. The phenomenon is intensifying.

When the base layer is formed for paving the road due to the lack of aggregates, the base layer is formed when the mixed aggregate of sand and gravel is not laminated to a predetermined thickness or the sea sand or gravel containing a large amount of salt is not properly washed. It is used as a mixed aggregate.

In this way, when the base is not normally constructed during road pavement construction or when the pavement is formed on the base with the mixed aggregate containing a large amount of salt, the load of the running vehicle and the repetitive operation Of course, there is a serious problem that the package is easily cracked due to the vibration transmitted from the vehicle, in which case the package is damaged.

On the other hand, as the reconstruction of the old multi-family house becomes more active, a large amount of construction waste is generated, and recycled sand and recycled gravel separated from such construction waste are poor in quality to be reused for construction. I'm not losing.

As a result, most of the generated construction waste is discarded or reclaimed, causing new pollution that destroys the natural environment or pollutes the soil.

An object of the present invention is to separate the concrete waste that can be used as aggregate from the construction waste, and to recycle them as an auxiliary base or road paving finisher when paving the road to solve the lack of aggregates and to solve the environmental pollution problem. It is to provide a road paving method using a new construction waste.

1 is a process chart showing the road paving method using the construction waste according to the present invention.

In order to achieve the above object, the present invention comprises the steps of separating the concrete waste usable as aggregate from the construction waste generated at the reconstruction site, crushing the separated concrete waste to a suitable size, and an auxiliary base formed for road paving or Transporting to the pavement layer and adding and mixing 160 kg of cement to 1700 kg (1 m ³ ) of concrete waste, and spraying an aqueous solution of solidifying agent dissolved by adding 1 kg of solidifying agent to 10 l of water to the concrete waste / cement compound And the step of laying the mixture of concrete waste / cement sprayed with the solidifying agent aqueous solution to a predetermined thickness on the road to be constructed, and leveling by using a doser, and flattening to the installation thickness and the slope gradient, Voltage compaction is carried out using the vibrating roller to make the overall compaction It characterized comprising the system.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a process chart showing the road paving method using the construction waste according to the present invention.

Referring to this, first, only the concrete waste that can be used as aggregate is separated from the construction waste generated at the reconstruction site (S1).

The separated concrete waste is crushed to a suitable size in a state where it is collected in one place, and then transported to the road to be constructed for use in forming an auxiliary base layer or a pavement layer of the road (S2).

1700 kg (1m ³ ) of the transported concrete waste is added at a rate of 160 kg of cement, and an aqueous solution of a hardening agent that is dissolved by adding a solidifying agent at a rate of 1 kg in 10 l of water is sprayed onto the concrete waste / cement mixture (S3).

The concrete waste / cement mixture in the state of spraying the solidifying agent solution is laid at a predetermined thickness on the road to be constructed (S4), and leveled using a doser while leveling with the installation thickness and the slope gradient (S5).

After the flattening operation, a plurality of voltages are compacted by using the vibration roller to uniformly compact the installation site (S6).

On the other hand, in the embodiment of the present invention, the solidifying agent added to the concrete waste / cement blend is NH ₄ Cl 5% by weight, NaCl 20% by weight, FeCl ₃ 2% by weight, C 1% by weight, MgCl 22% by weight, 25 weight percent KCl, 15 weight percent CaCl ₂ and 20 weight percent other.

Since the solidifying agent having such a composition ratio is made of an inorganic component, it has a function of adsorbing heavy metals contained in the target soil, allows the earth particles to be connected to needle crystals, and has an adsorption performance such as activated carbon.

In addition, the solidifying agent is excellent in improving the concrete waste, and the continuous hardening occurs over time, and as a road material easily stabilizes the soil with a lot of poor organic matter, while soft ground such as volcanic ash clay or viscous clay It is used to promote deep soil migration.

The uniaxial compressive strength measurement performed on the pavement in order to check the pavement state on the pavement by the method according to the present invention is carried out by measuring the compressive strength of soil, cement of KS F 2328, the test specimen Based on the 28-day old age, using the Sihu Research Equipment (NX) or Hilticore Harvester (Φ 2 ″), manufactured according to the indoor mixing test criteria, and cured in a wet brewing tank, the strength is measured, and the results are as follows. Table 1 shows.

On the other hand, permeation measurement measures the degree of water passing through the internal structure of the improved body, which is related to the quality of materials such as materials, formulations, curing methods, etc. It becomes a standard for judging durability.

Such permeability measurement methods include the pressure permeation method (Out Put) and the pressure permeation method (In Put), but the pressure permeation method is used to measure the permeability of the road pavement body constructed by the road pavement method according to the present invention. do.

Permeability measurement for the pavement of the road constructed according to the present invention was carried out as follows.

a) measuring instrument

-. Permeability Measuring Device: Hoek Triaxial Cell

-. Measurement specimens: cylindrical specimens of 28 days of age

b) measuring method

-. First, the surface of the specimen and the measuring vessel must be kept in a tightly sealed state. When the surface of the specimen and the membrane are in close contact with each other, they are kept tightly against a water pressure of 20 to 30 kg / cm ² .

-. In this state, the flow rate is the same as the flow rate and the flow rate is maintained until the steady state flow is formed.The flow rate is then calculated using the flow rate according to Darcy's law. .

k = rwhQ / PA

here,

k: Permeability coefficient (m / sec), A: Cross section of specimen (cm ² )

P: Water pressure (kg / cm ² ), h: Height of specimen (cm)

Q: Flow rate (cc / sec), rw: Unit weight on water (kg / cm ³ )

-. The U.S. Bureau of Measurement measures permeability coefficients using the inflow rate when the inflow and outflow rates are approximately equal (in the case of Ψ 15 cm after applying 28 kg / cm ² water pressure to a cylindrical specimen with the same diameter and height). Calculate

On the other hand, the running measurement for the pavement of the road constructed according to the present invention, if the road surface causes a large deformation or uneven deformation due to the traffic load transmitted through the pavement of the completed road, the pavement also naturally deforms This is done as part of a quality control test to detect defective points or reduce future deformations.

Leachate measurement on the pavement of the road construction according to the present invention is to collect the leachate from the upper part of the pavement commissioned to the authorized research institutes harmful components causing groundwater pollution, soil pollution, secondary environmental pollution Check it.

The flat load measurement of the pavement of the road constructed by the present invention is suitable for the use of KS F 2444 (measurement of soil bearing capacity against static load in the enlarged base) or KS F 2310 (method of flat plate load measurement of the road) Select the test method to implement quality control for the improved ground.

When the present invention is applied, the secondary base or road paving layer, which is the construction target for the pavement construction of the road, is used as concrete waste, and the cement and the hardener are mixed and solidified to be used in the reconstruction site. Concrete waste can be recycled.

In addition, the concrete waste solidifies and solidifies due to the characteristics of the solidifying agent, thereby improving safety and workability to the maximum, and when adding a small amount of cement, the permeability and elasticity are excellent, and the concrete waste to be constructed is Since it is improved, environmental pollution can be prevented to the maximum.

In addition, depending on the characteristics of the solidifying agent to be added, it will not age due to the continuous hardening over time, it will be environmentally friendly and stable soil in the long term, and protect the natural environment by the pollution-free inorganic components contained in the solidifying agent, Pollutants occupied in the soil are insoluble due to the heavy metal adsorption function of the solidifying agent.

In addition, the curing time after construction is short, the work process and air are shortened, the deodorizing function is performed by the adsorption capacity of the solidifying agent, and the cost of paving the road is used because the concrete waste generated at the reconstruction site is used as aggregate. In addition to reducing energy consumption, environmental pollution caused by concrete waste can be greatly reduced.

Claims (1)

Separating concrete wastes usable as aggregates from the construction wastes generated at the reconstruction site (S1); Grinding the separated concrete waste to an appropriate size, and transferring the auxiliary concrete layer or road pavement layer formed for road pavement (S2); Adding to the concrete waste 1700 kg (1 m ³ ) in a proportion of 160 kg of cement, and spraying the solidifying solution solution in which the concrete waste / cement compound is dissolved by putting a solidifying agent in a ratio of 1 kg to 10 L of water (S3); Laying a mixture of concrete waste / cement sprayed with an aqueous solution of solidifying agent to a predetermined thickness on a road to be constructed (S4); Leveling by using a doser and performing flat work according to the installation thickness and the slope gradient (S5); It includes a step (S6) to be compacted as a whole by performing a voltage compact using a vibration roller; The solidifying agent comprises a composition of 5% by weight of NH ₄ Cl, 20% by weight of NaCl, 2% by weight of FeCl ₃ , 1% by weight of C, 22% by weight of MgCl, 25% by weight of KCl, and 15% by weight of CaCl _2. Road paving method using building waste, characterized in that for improving the concrete waste.

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