KR20130102911A

KR20130102911A - Porous polymer block having improved rainwater drain function and manufacturing method thereof

Info

Publication number: KR20130102911A
Application number: KR20120024109A
Authority: KR
Inventors: 김영익; 성찬용
Original assignee: 충남대학교산학협력단
Priority date: 2012-03-08
Filing date: 2012-03-08
Publication date: 2013-09-23
Also published as: KR101343994B1

Abstract

The present invention relates to a porous polymer block for improving the excellent discharge function applied to the pavement of the sidewalk, plaza, parking lot, etc. More specifically, coarse aggregate, fine aggregate and filler are combined to combine with an allo type unsaturated polyester resin. It is formed into blocks to improve permeability, but the coarse aggregate uses recycled aggregate regenerated waste concrete, and the filler is calcium carbonate, fly ash or blast furnace slag to improve permeability while improving strength and freeze-thawing resistance. It is related with the porous polymer block which can prevent the fall of.

Description

POROUS POLYMER BLOCK HAVING IMPROVED RAINWATER DRAIN FUNCTION AND MANUFACTURING METHOD THEREOF}

The present invention relates to a porous polymer block and a method of manufacturing the same, which improves the excellent discharge function applied to the pavement of the sidewalk, plaza, parking lot, etc. More specifically, coarse aggregate, fine aggregate and fillers are allo-type unsaturated polyester resin Combined to form a block to improve the permeability, but the coarse aggregate is used recycled aggregate recycled waste concrete, the filler is calcium carbonate, fly ash or blast furnace slag to improve the permeability while improving the strength The present invention relates to a porous polymer block and a manufacturing method capable of preventing a decrease in freeze-thawing resistance.

Most road pavement in Korea is paved by impermeable pavement materials such as asphalt concrete and cement concrete. As the floodwaters of urban streams increase due to the direct runoff of rainwater, flood damage occurs frequently in lowlands and downstream areas, but groundwater is gradually being depleted due to the lack of infiltration water. Problems have been raised in the protection of natural ecosystems, such as impeding the growth of livestock.

Therefore, in recent years, the interest in permeable and drainage pavement, which greatly improved the existing impermeable cement concrete and asphalt pavement, to prevent flooding and flooding damage and to secure groundwater resources, has increased the roadway and sidewalks using permeable concrete or permeable asphalt. Construction cases such as, plazas and parking lots are increasing, and a lot of researches are being conducted on the development of permeable block products using porous concrete.

Chindaprasirt et al. Investigated the properties of cement pastes and their properties according to vibration and compaction in order to find the optimum conditions for the production of porous concretes. Kim et al. and Park et al. studied the mechanical and sound absorption characteristics of porous concrete with aggregate type and cement paste flow. Park. et al. evaluated the water purification characteristics of the porous concrete according to the aggregate size and the paste-aggregate ratio (P / G), and suggested that the porous concrete was effective in reducing T-P and T-N.

However, in the case of conventional permeable cement concrete and asphalt pavement, partial settlement and destruction due to cracks and aggregates fall frequently during repeated freeze-thawing in winter due to the low binding strength of the binder. There is a problem.

In addition, about 39 million tons of construction wastes are generated due to the recent urban redevelopment projects and social infrastructure expansion. Among them, waste concrete accounts for 24 million tons, but 90% of pecon concrete due to lack of regeneration facilities and lack of quality. The above is used for roadbed materials. Therefore, there is a need for research that can protect the environment while providing a place where the waste concrete can be recycled and used.

Therefore, the porous polymer block and its manufacturing method which improved the excellent discharge function of the present invention,

The purpose of the present invention is to provide a block capable of providing excellent strength while improving permeability by porosity by combining the recycled aggregate recycled waste concrete with a mixture of sand and filler using an unsaturated polyester resin as a binder and manufacturing it as a block. It is done.

In addition, the present invention is different from the material constituting the upper layer and the lower layer of the block, but the lower layer is formed of a plate body having a plurality of drain holes formed of impermeable concrete, filled with porous polymer concrete having excellent water permeability in the entire upper layer and the lower layer drain hole space. It is another object of the present invention to provide a block and a manufacturing method of a dual structure formed by partitioning impermeability and permeability by curing.

The porous polymer block and the manufacturing method which improved the excellent discharge function of the present invention for solving the above problems,

69-72% by weight of recycled aggregate regenerated waste concrete, coarse aggregate, 12-15% by weight of fine aggregate sand, and 7-9% by weight of filler fly ash or blast furnace slag or calcium carbonate were prepared. 6-6% by weight of an allotype unsaturated polyester resin as a binder is added to the mixture and mixed in a mixer so that the binder coats the mixture. The mixture coated with the binder is poured into a molding mold and demoulded after demolding to cure. It is produced through the porosity is 9 ~ 22%, the strength is 19 ~ 25MPa, characterized in that the excellent penetration is 14.5mm / hr.

In addition, in the porous polymer block that penetrates rainwater, the upper layer of the permeable material and the lower layer of the impermeable material are separated, but the lower layer forms a plurality of drainage holes made of the permeable material to limit the amount of rainwater discharged to the ground, Undrained excess rain can flow along the upper surface of the lower layer in the upper layer of the block to be discharged to a nearby drain.

The porous polymer block and the manufacturing method which improved the excellent discharge function of the present invention by the above solution means,

Coarse aggregate is used as recycled aggregate recycled waste concrete, and recycled resources are recycled using fly ash or blast furnace slag powder, which is industrial waste or by-product, and blocks are made of unsaturated polyester resin as binder. As a result, it is possible to provide a block and a manufacturing method capable of improving water permeability and providing excellent strength.

Therefore, it is possible to prevent the collapse of the ground due to oversupply by adjusting the amount of rainwater to be supplied to the ground during heavy rains, and in the permeable layer of the block without expressing a certain amount of rainwater exceeding the permeability of the drain hole to the upper part of the block. It is useful to improve the safety of walking and driving by preventing the accumulation of water on the upper part of the block by flowing to the drainage facility.

1 is a block diagram showing a manufacturing process of a polymer block according to an embodiment of the present invention.
Figure 2 is a graph showing the porosity of the porous polymer block for permeable packaging according to the amount of binder and filler.
3 is a graph showing the compressive strength of the porous polymer block for permeable packaging according to the amount of filler and binder.
Figure 4 is a graph showing the relationship between the compressive strength and porosity of the porous polymer block for permeable packaging according to the amount of filler and binder.
5 is a graph showing the flexural strength of the porous polymer block for permeable packaging according to the amount of filler and binder.
6 is a graph showing the permeability coefficient of the packaging porous polymer block according to the filler.
7 is a graph showing the relationship between the compressive strength and the coefficient of permeability of the porous polymer block for permeable packaging.
8 is a graph showing the relationship between the permeability coefficient and the porosity of the porous polymer block for permeable packaging.
9 and 10 are graphs showing nougat penetration and nougat surface discharge according to rainfall.
11a to 11c is a graph showing the weight change for freeze-thawing of the porous polymer block for permeable packaging according to the filler type and the amount of binder.
12A and 12B are a perspective view and a cross-sectional view showing a polymer block according to an embodiment of the present invention.
13 is a sectional view showing another example of a polymer block according to an embodiment of the present invention.
14 is a block diagram showing a manufacturing process of a polymer block according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the appended drawings illustrate only the contents and scope of technology of the present invention, and the technical scope of the present invention is not limited thereto. In addition, it will be apparent to those skilled in the art that various modifications and changes can be made within the scope of the present invention based on these examples.

The porous polymer block according to the present invention is manufactured by mixing the coarse aggregate, the fine aggregate, and the filler to produce a mixture, and adding the binder to the binder so that the binder is coated on the mixture. It is 9 to 22%, the strength is 19 to 25 MPa, and the excellent penetration amount has 14.5 mm / hr.

1. Material selection

As the coarse aggregate, recycled aggregate produced using waste concrete (Gyeonggi-do, I) is used, fine aggregate is used sand collected from the river, and as a filler, calcium carbonate, fly ash from the blast furnace, blast furnace Industrial wastes were recycled using fine powder such as blast furnace slag which was quenched and granulated in molten state. As the binder, an oxo-type unsaturated polyester resin using a DMP solution containing 55% methylethyl ketone prooxide as an initiator was used.

Physical properties of the binder, coarse aggregate and fine aggregate, and fillers are shown in Tables 1 to 3 below.

[Table 1]

[Table 2]

[Table 3]

2. Formulation Design

Unlike general concrete, the porous polymer block or concrete of the present invention has many continuous voids for permeation, and it is necessary to increase the coefficient of permeability and porosity in order to permeate rainwater in real time. However, increasing the permeability coefficient and porosity to increase the permeability can lead to a decrease in the strength of the polymer block, so a suitable formulation is required to improve the superiority without reducing the strength.

Thus, the present invention was formulated to satisfy 8% porosity standard and 1 × 10 ^-2 cm / s permeability coefficient of superior asphalt pavement. The amount of binder was used the same amount regardless of the type of filler in order to analyze the characteristics according to the type of filler, 6 to 9% of binder was used to evaluate the strength and porosity according to the amount of binder. Coarse aggregates and fine aggregates increased the proportion of coarse aggregates and reduced the proportion of fine aggregates compared to general concrete to have continuous voids, and the fillers were formed so as to secure the volume to cover aggregates by forming pastes with binders. 8% of the weight was used.

Based on the above contents, as shown in Table 4, mixing was performed at various mixing ratios within the scope of the present invention.

[Table 4]

PC: porous polymer concrete,

CA: calcium carbonate, FA: fly ash, BS: blast furnace slag

3. Manufacturing Method

In the block manufacturing using the material having the mixing ratio, as shown in FIG. 1, a coarse aggregate, a fine aggregate, and a filler are mixed in a mixture manufacturing step of preparing a mixture, and a binder is mixed with a high-speed mixer for 3 minutes by adding a binder to the mixture. A mixture coating step of coating the mixture; A mold molding step of pouring the mixture coated with the binder onto the molding mold to vibrate; Demolding the molding in the mold and curing the block curing step of producing a block having a porosity of 9 to 22%, a strength of 19 to 25MPa, an excellent penetration of 14.5mm / hr;

4. Various test

1) Porosity test

The porosity test was performed using the blocks prepared in the blending ratios of Table 4.

As a test method, it was measured by the volume method in the porosity test method of porous concrete of the Ecoconcrete Research Committee of Japan, and was calculated by the following [Equation 1].

[Equation 1]

(V ₀ = porosity (%),

W ₁ = weight of specimen in water (g)

W ₂ = weight of dried cured specimens (g),

V = volume of specimen (cm ³ ))

The pores of the porous polymer block for permeation pavement should be made continuously because rainwater must penetrate, whereas if the pores are formed in a straight line only for continuity, the bond strength of the porous structure is weak and the porous polymer block is destroyed by the load on the block. Proper pore formation is important because it can be.

2 shows the porosity of the porous polymer block for permeable packaging depending on the amount of binder and filler. Irrespective of the type of filler, the porosity of KS F 2385 (Permeable Asphalt Mixture) was over 8%, and the porosity tended to decrease as the amount of binder increased.

In the porosity of the fillers, the porosity of the PC-BA formulation ranged from 9-18% depending on the binder, slightly lower than the porosities of 11-21% and 11-22% of PC-CA and PC-FA.

The porosity of the porous polymer block depends not only on the particle size and blending of the coarse aggregate and the fine aggregate used, but also greatly on the amount and specific surface area of the filler forming the paste by bonding with the binder. If the amount of filler used and the specific surface area are large, the viscosity of the paste may be increased, leading to a decrease in porosity due to the increase of the coating thickness of the aggregate. On the other hand, if the amount of filler and the specific surface area are small, the paste thickness may be reduced due to the decrease of paste viscosity. The decrease leads to an increase in porosity. Therefore, the blending of porous polymer concrete using blast furnace slag powder with a large specific surface area as a filler has a higher viscosity of the paste (binder + filler) than the composite of porous ash concrete with a small specific surface area or calcium carbonate as a filler. In addition to increasing the coating thickness of the aggregate, it is believed that the voids decreased due to the engagement of the aggregate with the aggregate due to the increase of the coating thickness.

On the other hand, the porosity according to the amount of binder showed a tendency to decrease as the amount of binder increased, regardless of the filler. The porosity in the formulation using 9% binder content in the filler ranged from 9% to 11%, slightly above the 8% porosity standard for permeable packaging. In addition, in case of using 9% binder material, when the vibration compacting time is prolonged, the paste flows to the lower part and the lower part of the specimen is clogged, so it is necessary to be careful when manufacturing. In terms of porosity, within 9% when manufacturing the porous polymer block It is preferable to

2) Strength test

In the compressive strength test, a specimen of ø100 × 200mm was prepared and loaded at a speed of 130kgf / s according to the method specified in KS F 2481 (Test method for compressive strength of polyester resin concrete) on the 7th day.

In the flexural strength test, a specimen of 60 × 60 × 240 mm was prepared and loaded at a rate of 5 kgf / s in accordance with the method specified in KS F 2482 (Test method for bending strength of polyester resin concrete).

Compressive strength is different depending on the type of aggregate, mixing conditions, etc., and is one of the representative ones showing the mechanical properties of the block. In addition, the compressive strength is not only a standard for mixing design, but also can estimate tensile strength, flexural strength, modulus of elasticity, durability, etc. It is known that the strength of the porous block is determined by the interlocking bond between the aggregate and the aggregate, unlike the general block expressing the strength by the fine structure of the binder and the aggregate due to the characteristics of the porous structure.

Figure 3 shows the compressive strength of the porous polymer block for permeable packaging according to the filler and binder amount. Regardless of the type of filler, the compressive strength tended to increase as the amount of binder increased in both PC-CA, PC-FA, and PC-BS formulations. Regardless of the type of filler, the 6% binder showed a compressive strength of 18.2 ~ 18.9MPa, slightly exceeding the 18MPa, the compressive strength criterion of the block for permeation paving. In addition, regardless of the type of filler, it was found that it is very advantageous to increase the amount of binder in terms of compressive strength by showing 23.2 ~ 24.8 MPa at 9% of binder, significantly exceeding 18MPa, which is a criterion of compressive strength.

This is because, as with the porosity test, the amount of paste (binder + filler) increased and the viscosity increased as the amount of binder increased, and not only the coating thickness of the aggregate was increased but also the effect of interlocking aggregate and aggregate by the increase of the coating thickness increased.

On the other hand, as shown in the porosity test results, the binder content of more than 9% greatly reduces the porosity, which implies that the permeability is impaired when the permeability package is applied. Therefore, 7-8% of the binder material can satisfy both the porosity and the compressive strength. It is believed that the amount of binder is appropriate for the formulation of the porous polymer concrete for permeable pavement.

The compressive strengths of PC-CA, PC-FA, and PC-BS according to the type of filler showed the highest compressive strength in PC-BS formulations using blast furnace slag powder regardless of the amount of binder, and PC using calcium carbonate and fly ash. -CA and PC-FA formulations showed similar compressive strengths. This result is because the specific surface area of the blast furnace slag powder used in the filler is larger than that of calcium carbonate and fly ash, so that the coating thickness of the aggregate by the paste is increased and the binding strength between the aggregate and the aggregate is increased. In particular, since the compressive strength of the porous polymer block blend using industrial wastes and by-products blast furnace slag powder and fly ash as fillers is almost the same as or slightly larger than that of the porous polymer blocks using calcium carbonate fillers, Their utility is expected in manufacturing.

Figure 4 shows the relationship between the compressive strength and porosity of the porous polymer block for permeable packaging according to the amount of filler and binder. Regardless of the type of filler and the amount of binder, the porosity decreased with increasing compressive strength. In order to increase the compressive strength, it is necessary to increase the coating thickness of the aggregate, while in order to increase the porosity, there is a trade-off between reducing the coating thickness of the aggregate.

Figure 5 shows the flexural strength of the porous polymer block for permeable packaging according to the amount of filler and binder. As with the compressive strength test results, the flexural strength tended to increase as the amount of binder increased regardless of the filler type, and the PC-BS blend showed higher flexural strength than the other blends. In the case of porous cement blocks made of cement, the flexural strength is significantly lower than that of compressive strength due to the low bonding strength of cement. On the other hand, in the porous polymer block made of unsaturated polyester resin as the binder, not only the compressive strength but also the high strength of the binder is used. It can be seen that the flexural strength characteristics are very excellent.

3) Permeability coefficient test

The permeability coefficient of the porous polymer block was measured according to the Permeability Coefficient Test Method for Poros Concrete of Japan's Eco Concrete Research Committee, and was calculated by Equation 2 based on the Darcy law.

&Quot; (2) "

(K = Permeability (cm / s)

H = sample height (cm)

A = cross section (cm ² )

h = water level difference (cm)

Q = quantity passed in (t _2- t ₁ ) time (cm ³ )

Figure 6 shows the permeability coefficient of the packaging porous polymer block according to the filler. The permeability coefficients of the porous polymer block according to the binder content in PC-CA, PC-FA, and PC-BS formulations were 4.8 × 10 ^-2 cm / s to 4.4 × 10 ^-1 cm / s and 2.7 × 10 ^-2 cm /, respectively. s ~ 3.1 × 10 ^-1 cm / s and 1.8 × 10 ^-2 cm / s ~ 2.9 × 10 ^-1 cm / s, the permeability coefficient tended to decrease with increasing the amount of binder. In addition, similar to the test result of porosity, the permeability coefficient of PC-BS blended showed a tendency to decrease slightly compared to the permeability coefficient of PC-CA and PC-FA blended. It was found to be above the permeability coefficient of 1.0 × 10 ⁻² cm / s of the asphalt mixture.

Figure 7 shows the relationship between the compressive strength and the coefficient of permeability of the porous polymer block for permeable packaging. As the compressive strength increases, the permeability coefficient tends to decrease, indicating that there is a tradeoff. The correlation coefficient between the compressive strength and the permeability coefficient was found to have high significance as R ² = 0.87, which is represented by the following [Equation 3].

&Quot; (3) "

y = -0.056x + 1.375 (R ² = 0.87)

Where y = permeability and x = compressive strength

In order to increase the compressive strength, the coating thickness of aggregate by paste (binder + filler) must be increased, while the permeability coefficient required to penetrate rainwater in real time due to the permeability of packaging is reduced by reducing the coating thickness of aggregate so that the voids are larger than a certain size. Should be formed. Therefore, it is necessary to derive the optimum mixture that satisfies the conditions of the compressive strength and the permeability coefficient.

As shown in FIG. 7, the compressive strength criterion of 18 MPa and the permeability coefficient of 1 × 10 ^-2 cm / s were found to be satisfied under all the mixing conditions. And since problems such as pore clogging and durability deterioration may occur under long-term use, a formulation that satisfies the boundary condition of FIG. 7 may be considered as the optimal formulation.

8 shows the relationship between the permeability coefficient and the porosity of the porous polymer block for permeable packaging. Since both the permeability coefficient and the porosity are related to the pore size and the pore number of the porous polymer block, the porosity also increased as the permeability coefficient increased. The correlation coefficient between the permeability coefficient and the porosity R ² = 0.84 was found to have high significance, and was expressed by the following Equation 4.

&Quot; (4) "

y = 27.43x + 10.78 (R ² = 0.84)

Where y = porosity and x = permeability

As shown in FIG. 8, all formulations were found to satisfy the porosity standard of 8% and the permeability coefficient of 1 × 10 ^-2 cm / s for permeable packaging, but by traffic of vehicles and pedestrians during use after site application. Since the pore clogging may occur, the boundary condition of FIG. 8 may be proposed as an optimal blending condition.

4) Outflow Penetration Characteristics

In order to evaluate the characteristics of storm runoff reduction due to the permeation block pavement, a permeation model experiment was conducted on the permeation package. Permeability model specimens are permeable pavements formed of subgrade, gravel, sand and permeable polymer blocks, rainfall simulators for reproducing various rainfall strengths, and under the pavements for real-time rainfall and rainwater penetration in the upper and lower pavements. It consisted of an installed tank. In the specifications of the permeable pavement model, the paving height is 20cm in the bed layer, 20cm in the gravel layer, 3cm in the sand layer, and 8cm in the permeable polymer block thickness according to the road block paving standard, and a fiber sheet is installed between the gravel layer and the sand layer to prevent the loss of the sand layer. It was. The permeable pavement cross section was 1.80m × 0.90m, and the pavement cross section was composed of the shear permeation block and the partial permeation block to evaluate the excellent penetration effect according to the shape of the permeation block. The rainfall module consists of a reservoir, a motor pump, a flow meter, a pressure gauge, and a spray nozzle, and the spray nozzles are distributed so that the rainfall intensity can be supplied to the whole surface of the storm pavement as well as to reproduce various rainfall intensities by the pressure gauge and the control valve. It was. Rainfall and infiltration were measured directly using a water tank.

A hydraulic model test was performed to evaluate the real-time runoff-flow characteristics in a permeable polymer block package for rainfall intensity of 100 mm / hr.

Artificial rainfall duration is 720 minutes (12 hours) in total, real-time penetration amount and surface outflow amount was measured according to the rainfall, Figures 9 and 10 shows nougat penetration and nougat surface discharge amount according to the rainfall.

At the same time, the rainfall began to penetrate through the permeable polymer block on the package and into the lower ground, and it took about 3 minutes for the rainfall to pass through the lower ground to reach the infiltration tank. As the rainfall continued, the penetration rate and the amount of penetration increased. Penetration at 60 minutes of initial rainfall was 14.5mm / hr, and the rainfall duration reached nearly 180 minutes, showing a nearly constant level of penetration. On the other hand, the initial surface leakage occurred in the permeable block package after 2 hours and 15 minutes from the start of the rainfall, after which the surface outflow showed a tendency to increase significantly. In addition, after 360 minutes of rainfall, the inflow and outflow reached almost the same level, after which the outflow exceeded the inflow.

This result is because the permeation rate is increased by the permeation block, which is the upper pavement, at the early stage of rainfall. However, as the rainfall continues, the permeability of the entire package is greatly reduced as saturation occurs in the lower ground where the permeability coefficient is relatively low. It seems to be. In addition, as the rainfall continues, it is believed that the surface runoff is greatly increased as the rainfall reverses due to saturated underpack.

5) Freeze thaw resistance test

The freeze-thaw resistance test was made of 60 × 60 × 240㎜ specimens and subjected to rapid freeze-thaw test in water in accordance with KS F 2456 (Test method of concrete resistance to rapid freeze-thaw) at 7 days of age. Freezing was -18 ° C and melting was 4 ° C. One cycle of freezing and thawing took 4 hours. The rate of weight change was measured every 50 cycles during the test, and the test was completed when the repetition of the freeze thaw reached 300 cycles.

In general, when freeze-thawing occurs repeatedly, the mass decreases due to the surface dropping of concrete due to scaling or pop out of the concrete. In addition, it is known that volume expansion occurs due to repeated freezing and melting of water in concrete, and the density in concrete decreases, thereby decreasing relative dynamic modulus and decreasing durability.

On the other hand, in the case of porous concrete and permeable concrete, unlike general concrete, it is known that the freeze-thawing action has a different mechanism from that of general concrete because it is made by combining aggregate and aggregate. The porous concrete always contains a lot of water inside the concrete due to the porous structure.As a result of the expansion of water during freezing, aggregate fall and destruction occurs due to the decrease of the binding force between aggregate and aggregate, and it is more resistant to freezing and thawing than general concrete. Is reported to be low.

On the other hand, the freeze-thaw resistance is evaluated by measuring the relative dynamic modulus of elastic modulus by measuring the elastic modulus of elasticity.However, in the case of porous concrete, it is difficult to measure the dynamic modulus of elasticity due to many voids and the accuracy is low. The durability of the freezing and thawing was evaluated by observing the appearance of weight change and aggregate dropout.

11a to 11c is a graph showing the weight change of the freezing thaw of the porous polymer block for permeable packaging according to the filler type and the amount of binder.

In the PC-CA formulation (FIG. 11a), the weight loss rate of the porous polymer block after freeze-thawing 300 cycles according to the binder content was 1.1 to 2.9%, indicating that there was little change in the weight loss and the surface of the porous polymer block regardless of the binder content. .

In addition, in the combination of industrial waste and by-products fly ash and blast furnace slag powder as filler, the weight reduction rate of the porous polymer block after 300 cycles of freeze-melting according to the binder content in the PC-FA (FIG. 11b) and PC-BS (FIG. 11c) formulations, respectively. The trends ranged from 1.1 to 3.6% and from 0.9 to 3.8%, almost similar to the weight change of the PC-CA blend.

In the case of cement porous concrete blocks, the aggregate adhesion and the degradation of durability are prominent due to the decrease of the binding strength between aggregate and aggregate due to the low adhesion of cement as a binder during freeze-thawing, whereas the porous polymer concrete blocks have excellent adhesion properties of unsaturated polyester resin. The use of the aggregate and the aggregate is very excellent by use, and even after 300 cycles of freeze-thawing, durability degradation such as dropping of the aggregate does not occur.

In addition, the freeze-thaw resistance of all blends regardless of the type of filler is excellent because the freeze-thaw resistance of the porous polymer concrete block depends on the adhesion performance of the binder used rather than the aggregate or filler used. In addition, the weight change of less than 4% in all formulations, regardless of the amount of binder, is because the adhesion of aggregates due to the binding force of unsaturated polyester resin used as binder is greater than shrinkage and expansion force during freeze-thawing of water inside the porous polymer concrete. .

Thus, in consideration of permeability, strength and freeze-thawing resistance, the porous polymer block of the present invention is 69 to 72% by weight of recycled aggregate recycled from waste concrete, coarse aggregate, 12 to 15% by weight of fine aggregate sand, and fly ash or filler. 7-9% by weight of blast furnace slag or calcium carbonate and 6-9% by weight of the unsaturated polyester resin of the allotype as a binder, the porosity is 9-22%, the strength is 19-25MPa, and the excellent penetration is 14.5 It is desirable to provide a block or package that is mm / hr.

Meanwhile, the porous polymer block according to the present invention may have a two-stage structure in which an upper portion is formed of the above-mentioned water-permeable layer and the lower portion is formed of an impermeable layer made of general cement.

12A and 12B, the porous polymer block 10 that penetrates rainwater is separated into an upper layer 20 of a water-permeable material and a lower layer 30 of an impermeable material.

The upper layer 20 of the permeable material is 69 ~ 72% by weight of the recycled aggregate recycled waste concrete, coarse aggregate as described above, 12-15% by weight of fine aggregate sand, fly ash or blast furnace slag or carbonic acid filler It is composed of 7 to 9% by weight of calcium and 6 to 9% by weight of an unsaturated polyester resin of an olso type as a binder.

In addition, the lower layer 30 of the impermeable material is a binder 7 ~ 25% by weight, coarse aggregate 25 ~ 40% by weight, fine aggregate 35 ~ 55% by weight, water 1 ~ 10% by weight, polycarboxylic acid-based water reducing agent 0.05 ~ 3.0% by weight The mixture may be formulated, and the fly ash or blast furnace slab may be further added to 3 to 25% by weight of the total mixture to form the bottom layer.

In addition, a plurality of drain holes 31 are formed in the lower layer 30 so that the rainwater dropped to the upper part of the block is discharged to the ground 40 through the drain holes, and the drain holes are formed as hollow parts or filled with the above-mentioned permeable material. can do. As described above, when the drainage hole is formed in the lower layer, the rainwater introduced into the upper layer 20 is discharged to the ground 40 by the transmittance of the drainage hole 31, and the amount of rainwater exceeding the allowable amount is the water permeable layer. Phosphorus flows along the upper surface of the lower layer in the upper layer 20 to be discharged to a nearby drainage facility.

Therefore, it is possible to prevent the collapse of the ground due to oversupply by adjusting the amount of rainwater to be supplied to the ground during heavy rains, and in the permeable layer of the block without expressing a certain amount of rainwater exceeding the permeability of the drain hole to the upper part of the block. By flowing to the drainage system, there is an effect that can prevent some water accumulation on the upper part of the block.

In addition, as shown in FIG. 13 to prevent separation of the upper layer 20 and the lower layer 30, the shape of the drain hole 31 may be formed in the shape of a truncated cone or a polygonal truncated cone of the upper and lower light beams with the lower portion extended. The drainage holes can be supplied in various forms, such as forming a plurality of holes in the front of the block layer or a large one in the center.

In the manufacturing method of the polymer block having the upper and lower multilayer structure, as shown in FIG. This step is a mixture of 69 ~ 72% by weight of recycled aggregate recycled waste concrete, coarse aggregate, 12-15% by weight of fine aggregate sand, and 7-9% by weight of filler fly ash or blast furnace slag or calcium carbonate. To prepare.

Next, the mixture coating step is performed. The mixture coating step is a step in which 6 to 9% by weight of an unsaturated polyester resin of an oxo type as a binder is added to the mixture and mixed by a mixer to coat the mixture.

When the coating step is performed, a mold molding step is performed. The binder-coated mixture is poured into a molding mold, and mold molding is performed by vacuum compaction.

At this time, the step of placing the impermeable lower layer block in the molding mold may be made before the mixture is injected into the molding mold.

The lower block in the step of placing the lower block is a binder of Portland cement 7-25% by weight, coarse aggregate 25-40% by weight, fine aggregate 35-55% by weight, water 1-10% by weight, water reducing agent 0.05-3.0% by weight Mixing the mold to form a plurality of drainage holes formed by a separate molding mold, after curing the step of placing the lower block to form a lower layer in the molding mold for molding the polymer block of the present invention. Therefore, when the mixture coated with the polyester resin is added to the molding mold in which the lower block is placed, the mixture forms the upper layer on the lower block and the mixture is filled in the drainage holes formed in the lower layer (lower block), thereby forming the upper layer and the lower layer integrally.

When the mold molding is completed, a block curing step is performed. By demolding the molding from the molding mold and curing it, a polymer block having a porosity of 9 to 22%, a strength of 19 to 25 MPa, and an excellent penetration amount of 14.5 mm / hr is produced.

10: polymer block
20: top layer
30: lower layer
31: drain hole
40: ground

Claims

69-72% by weight of recycled aggregate regenerated waste concrete, coarse aggregate, 12-15% by weight of fine aggregate sand, and 7-9% by weight of filler fly ash or blast furnace slag or calcium carbonate were prepared. 6-6% by weight of an allotype unsaturated polyester resin as a binder is added to the mixture and mixed in a mixer so that the binder coats the mixture. The mixture coated with the binder is poured into a molding mold and demoulded after demolding and curing. Porous polymer block, characterized in that the porosity is 9 to 22%, the strength is 19 to 25MPa, the excellent penetration is 14.5mm / hr.

In the porous polymer block which infiltrates rainwater,
Separately composed of the upper layer 20 of the water-permeable material and the lower layer 30 of the impermeable material,
The lower layer 30 forms a plurality of drainage holes 31 formed of a permeable material to limit the amount of rainwater discharged to the ground, and the excess rainwater that is not discharged flows along the upper surface of the lower layer in the upper layer of the block to a nearby drainage facility. A porous polymer block, characterized in that the discharge.

The method of claim 2,
The upper layer 20 and the lower layer drain hole 31
69-72% by weight of recycled aggregate regenerated waste concrete, coarse aggregate, 12-15% by weight of fine aggregate sand, and 7-9% by weight of filler fly ash or blast furnace slag or calcium carbonate were prepared. 6-6% by weight of an allotype unsaturated polyester resin as a binder is added to the mixture and mixed in a mixer so that the binder coats the mixture. The mixture coated with the binder is poured into a molding mold and demoulded after demolding to cure. Porous polymer block, characterized in that the porosity is 9 to 22%, the strength is 19 to 25MPa, the excellent penetration is 14.5mm / hr.

The method of claim 3,
The drain hole 31 is formed in the form of the upper side down light extended to the porous polymer block, characterized in that to prevent the upper layer and the lower layer is separated after curing.

69-72% by weight of recycled aggregate regenerated waste concrete, coarse aggregate, 12-15% by weight of fine aggregate sand, and 7-9% by weight of fly ash or blast furnace slag or calcium carbonate as a filler to prepare a mixture Preparing a mixture;
A mixture coating step of adding 6-9% by weight of an unsaturated polyester resin of an oxo type as a binder to the mixture and mixing the mixture with a mixer to coat the mixture;
A mold molding step of pouring the mixture coated with the binder onto the molding mold to vibrate;
Demolding the molding in the mold and curing it, a block curing step of producing a block having a porosity of 9 to 22%, a strength of 19 to 25 MPa, and an excellent penetration amount of 14.5 mm / hr; a porous polymer block comprising a Manufacturing method.

The method of claim 5,
In the mold molding step, a plurality of drainage holes are mixed with 7 to 25% by weight of Portland cement, 25 to 40% by weight of coarse aggregate, 35 to 55% by weight of fine aggregate, 1 to 10% by weight of water, and 0.05 to 3.0% by weight of reducing agent. And placing the lower block in the molding mold to form the lower layer by placing the lower block cured to be formed in the molding mold.