KR101219275B1 - Permeable polymer consrete composition - Google Patents

Abstract

The present invention includes 1 to 20 parts by weight of binder, 0.1 to 10 parts by weight of calcium carbonate, 0.1 to 10 parts by weight of blast furnace slag, 5 to 25 parts by weight of fine aggregate and 35 to 85 parts by weight of coarse aggregate, By presenting a water-permeable polymer concrete composition comprising 60 to 85 parts by weight of unsaturated polyester resin, 1 to 15 parts by weight of polytrimethylene trephalate resin, and 0.1 to 10 parts by weight of butyl acrylate, based on 100 parts by weight of the binder. It can shorten the curing period by reducing the curing time, reduce surface stains and clogging due to bleeding, and easy to construct, and it has excellent strength, water tightness and durability, so it is applied to bicycle roads, parking lots, and light traffic load passing roads. It is possible to reduce the manufacturing cost by reducing the thickness of the package, it is easy to handle to reduce the cost of handling.

Description

Permeable Polymer Concrete Composition {PERMEABLE POLYMER CONSRETE COMPOSITION}

FIELD OF THE INVENTION The present invention relates to the field of construction materials, and in particular, to permeable concrete compositions.

Water permeable concrete is a form of continuous air gaps using residual aggregates that can be easily penetrated underground, such as rainwater flowing along the surface of the concrete or stagnating. Since its introduction into the city, it has been widely used not only for sidewalks but also for roadways.

Currently, large quantities of groundwater are used in large buildings, factories, and public baths, and groundwater is depleted, resulting in desertification of the strata and soil deformation. Etc. are concerned.

Therefore, the demand for paving permeable cement concrete for sidewalks is increasing.

However, the conventional permeable cement concrete has a problem that the overall process period is long because the curing period is long after the construction on the roadbed, such as road.

In addition, when the expression of the color is required, the pigment in the permeable cement concrete, and the coating treatment with an epoxy resin or an acrylic resin in order to clarify the color, which has a problem that increases the risk of accidents by generating slip during rainfall.

The present invention was derived to solve the above problems, can reduce the curing period, shorten the process period, the surface stains and clogging due to bleeding is reduced, the strength and durability is excellent bike road, parking lot, It is an object of the present invention to propose a water-permeable polymer concrete composition that can be applied to light traffic load passing roads.

In order to solve the above problems, the present invention is 1 to 20 parts by weight of the binder, 0.1 to 10 parts by weight of calcium carbonate, 0.1 to 10 parts by weight of blast furnace slag, 5 to 25 parts by weight of fine aggregate and coarse aggregate 35 It includes ~ 85 parts by weight, 60 to 85 parts by weight of unsaturated polyester resin, 1 to 15 parts by weight of polytrimethylene trephalate resin, 0.1 to 10 parts by weight of butyl acrylate based on 100 parts by weight of the binder A water permeable polymeric concrete composition is presented.

The water-permeable polymer concrete composition preferably further comprises 0.01 to 5 parts by weight of dibutyltin dilaurate.

The water-permeable polymer concrete composition preferably further comprises 0.01 to 3 parts by weight of isophorone diisocyanate.

The present invention can reduce the curing period and shorten the process period, the surface stains and clogging due to bleeding is reduced, easy construction, excellent strength, water tightness and durability, bicycle road, parking lot, light traffic load passing road The present invention provides a water-permeable polymer concrete composition, which can be applied to the present invention, reduces the manufacturing cost by reducing the thickness of the package, and can be easily handled to reduce the cost of handling.

Hereinafter, embodiments of the present invention will be described in detail.

The water-permeable polymer concrete composition according to the present invention basically contains 1 to 20 parts by weight of binder, 0.1 to 10 parts by weight of calcium carbonate, 0.1 to 10 parts by weight of blast furnace slag, 5 to 25 parts by weight of fine aggregate and the like. It comprises 35 to 85 parts by weight of coarse aggregate, including 60 to 85 parts by weight of unsaturated polyester resin, 1 to 15 parts by weight of polytrimethylene trephalate resin, and 0.1 to 10 parts by weight of butyl acrylate based on 100 parts by weight of the binder. do.

Herein, it is preferable to further include 0.01 to 5 parts by weight of dibutyltin dilaurate, and more excellent physical properties can be obtained when the content further includes 0.01 to 3 parts by weight of isophorone diisocyanate.

An unsaturated polyester resin refers to a high molecular compound in which saturated monomers of the constituent molecules are polymerized by ester bonds.

The unsaturated polyester resin can be easily handled and freely cured at room temperature, and the curing time can be freely adjusted according to the content of the curing agent and the accelerator.

In addition, it has good mechanical and electrical properties and chemical resistance compared to other thermosetting resins.

The unsaturated polyester resin used in the preferred embodiment of the present invention is an ortho type to which a cobalt-based curing accelerator is added, and its components and structural formulas are shown in Table 1 and Structural Formula 1 below.

[Structural formula 1]

The unsaturated polyester resin is preferably contained 60 to 85 parts by weight based on the total weight of the binder, but when the content of the unsaturated polyester resin exceeds 85 parts by weight, the rigid polyester becomes stiff and easily brittle, and less than 60 parts by weight may reduce the strength. Because it can.

Polyethylene PTT resin is a polymer compound having an ester bond -CO-O- in its molecule as a main base, and is generally a compound made by condensation polymerization of a dihydric alcohol or a dihydric carboxylic acid.

The polytrimethylene terephthalate (PTT) has excellent properties such as mechanical properties, chemical resistance, elasticity, electrical properties and heat resistance.

Structural formula 2 below shows polytrimethylene terephalate (PTT).

[Formula 2]

The PTT resin is preferably contained in an amount of 1 to 10 parts by weight based on the weight of the binder, because when the content of the PTT resin is more than 10 parts by weight, the rigidity becomes strong and brittle, and when it is less than 1 part by weight, the strength may be lowered.

Butyl acrylate (hereinafter referred to as 'BA') resin has excellent weather resistance, which is resistant to weather and climate, such as sunlight, suppressing corrosion caused by external environmental changes (weather and climate change), and It penetrates and integrates to improve adhesion strength and toughness and to improve colorability by pigments.

The content of the butyl acrylate (BA) resin is preferably about 0.1 to 5 parts by weight, the workability is not good when the content of the butyl acrylate (BA) resin is less than 0.1 parts by weight, the viscosity is more than 5 parts by weight This is because the workability is improved due to the small size, but the curing time may be long and the strength may be weakened.

Dibutyltin dilaurate is used as a catalyst and isophorone diisocyanate is used as a curing agent.

Dibutyltin dilaurate (DBTDL) is an organometallic compound used as a curing accelerator for unsaturated polyester resins, polytrimethylene terephthalate (PTT) resins and butyl acrylate (BA) resins.

In general, dibutyltin dilaurate is a complex metal compound based polyurethane (PU) reaction and a hardening accelerator, and is superior to other metals in terms of safety to the human body, excellent catalytic ability and thermal stability, especially The reaction rate of urethane resins, esters, etc. is increased.

In addition, monobutyltin (MBT), Dibutyltin (DBT), Tributyltin (TBT), Tetrabutyltin (TeBT), Monooctyltin (MOO), Dioctyltin ( No harmful substances such as Dioctyltin (DOT), Tricyclohexyltin (TchT), Triphenyltin (TPT), etc. are detected.

The content of dibutyltin dilaurate is preferably in the range of 0.01 to 5 parts by weight. If the content of dibutyltin dilaurate is less than 0.01 part by weight, the reaction rate is lowered and the curing time is slowed, and the content is 5 parts by weight. If it exceeds, hardening time will accelerate and workability will fall.

The curing agent isophorone diisocyanate (IPDI) is a cycloaliphatic diisocyanate monomer that is useful in the manufacture of chemicals, reactive intermediates, and polymers. Used when making

Polymer products made using isophorone diisocyanate (IPDI) exhibit high flexibility with excellent mechanical strength.

In addition, while maintaining excellent wear resistance, water resistance, and gloss and physical properties over time, there is a property to produce an optically transparent polyurethane (PU) when used with a suitable polyol (Polyol).

The chemical formula of isophorone diisocyanate (IPDI) is C ₁₂ H ₁₈ N ₂ O ₂ .

The content of isophorone diisocyanate (IPDI) is preferably in the range of 0.1 to 10 parts by weight. If the content of isophorone diisocyanate is less than 0.01 part by weight, the reaction rate is lowered and the curing time is slowed, and the content is more than 3 parts by weight. This is because the curing time is faster and workability is lowered.

Calcium carbonate and blast furnace slag are used as fillers.

Used inorganic fillers enhance strength, increase resistance to freeze-thawing, increase chemical resistance to sulfuric acid, hydrochloric acid or organic acids, as well as reduce heat of hydration, improve hydrothermal and durability, high strength and high It has characteristics that are effective for producing concrete having durability.

Such a filler not only improves the durability of the package, but also improves its load resistance, so that calcium carbonate and blast furnace slag can be used to form a package that can sufficiently withstand the load and impact of a large vehicle.

Hereinafter, the present invention will be described in detail by test examples.

Example 1

Permeable polymer concrete was prepared, including 10 parts by weight of binder, 10 parts by weight of calcium carbonate, 10 parts by weight of blast furnace slag, 20 parts by weight of fine aggregate, and 50 parts by weight of coarse aggregate.

And 70 parts by weight of unsaturated polyester resin, 15 parts by weight of polytrimethylene trefalate resin, 10 parts by weight of butyl acrylate, 4 parts by weight of dibutyltin dilaurate and 1 part by weight of isophorone diisocyanate based on 100 parts by weight of the binder. To prepare a binder.

[Example 2]

Permeable polymer concrete was prepared, including 10 parts by weight of binder, 10 parts by weight of calcium carbonate, 10 parts by weight of blast furnace slag, 20 parts by weight of fine aggregate, and 50 parts by weight of coarse aggregate.

And 75 parts by weight of unsaturated polyester resin, 10 parts by weight of polytrimethylene trefalate resin, 10 parts by weight of butyl acrylate, 4 parts by weight of dibutyltin dilaurate and 1 part by weight of isophorone diisocyanate based on 100 parts by weight of the binder. To prepare a binder.

[Example 3]

Permeable polymer concrete was prepared, including 10 parts by weight of binder, 10 parts by weight of calcium carbonate, 10 parts by weight of blast furnace slag, 20 parts by weight of fine aggregate, and 50 parts by weight of coarse aggregate.

 And 80 parts by weight of unsaturated polyester resin, 10 parts by weight of polytrimethylene trefalate resin, 5 parts by weight of butyl acrylate, 4 parts by weight of dibutyltin dilaurate and 1 part by weight of isophorone diisocyanate based on 100 parts by weight of the binder. To prepare a binder.

Comparative Example 1

Permeable polymer concrete was prepared including 10 parts by weight of unsaturated polyester resin, 10 parts by weight of calcium carbonate, 10 parts by weight of blast furnace slag, 20 parts by weight of fine aggregate and 50 parts by weight of coarse aggregate.

The following test examples show the experimental results comparing the characteristics of the examples according to the present invention and the comparative example to more easily understand the characteristics of Examples 1 to 3 according to the present invention.

Test Example 1 Porosity Test

The porosity of permeable concrete was calculated by the following formula, where the absolute unit volume weight (zero porosity) is the weight calculated from the specific gravity of concrete components.

At this time, the unit volume weight test was measured by KS F 2409, and the results are shown in Table 2 below.

Porosity (%) = [100- {Unit volume weight / absolute unit weight of permeable concrete}] × 100

Test Example 2 Permeability Test

Concrete specimens of Φ10 × 10 cm were prepared by KS F 2322 (Soil Water Permeability Test Method), and the permeability coefficient was measured at 28 days of age, and the results are shown in Table 2 below.

Test Example 3 Compressive Strength Test

The compressive strength test of the specimens was carried out by KS F 1108 (concrete strength test method of concrete), and the results are shown in Table 3 below.

Test Example 4 Flexural Strength Test

The flexural strength test of the specimens was carried out by KS F 1106 (concrete flexural strength test method), and the results are shown in Table 3 below.

Test Example 5 Tensile Strength Test

The tensile strength test of the specimens was carried out by KS F 1113 (Test method for tensile strength of concrete), and the results are shown in Table 3 below.

As shown in Table 3, Examples 1 to 3 showed higher strength than Comparative Example 1. In addition, the allowable flexural strength of the packaging also showed a value higher than 45 kgf / cm ² .

Test Example 6 Freeze-thawing Test

The freeze-thaw test was carried out on the freeze-thaw test specimens in accordance with KS F 2456 (Test method for resistance to rapid freezing thaw). The freeze-thaw test was carried out at -18 when freezing and 4 when melting. One cycle of freeze thawing took 2 hours 40 minutes.

Measurements were taken at intervals of every 50 cycles during the test, and the test was completed when the repetition of freeze thaw reached 300 cycles.

The durability index at this time was calculated. The endurance index was calculated by the following equation when the repetition of freezing thaw was completed in 300 cycles (KS F 2456 rapid resistance test method of concrete), and the results are shown in Table 4.

DF = PN / M

DF: Durability Index

P: Relative dynamic modulus in N cycles (%)

N: number of cycles at the end of exposure to freezing and thawing

M: number of cycles at the end of exposure to freeze-thawing

As shown in Table 4, Examples 1 to 3 showed a higher durability index than Comparative Example 1.

[Test Example 7]

The water-permeable polymer concrete compositions of Examples 1 to 2 and the compositions prepared according to Comparative Example 1 were tested according to JIS A 1171 (Test Method of Polymer Cement Mortar), and the results are shown in Table 5.

As shown in Table 5 above, Examples 1 to 3 showed less chloride ion penetration depth than Comparative Example 1, so it was confirmed that resistance to salt was high.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.

Claims (3)

1 to 20 parts by weight of binder, 0.1 to 10 parts by weight of calcium carbonate, 0.1 to 10 parts by weight of blast furnace slag, 5 to 25 parts by weight of fine aggregate and 35 to 85 parts by weight of coarse aggregate,
A water-permeable polymer concrete composition comprising 60 to 85 parts by weight of unsaturated polyester resin, 1 to 15 parts by weight of polytrimethylene trephalate resin, and 0.1 to 10 parts by weight of butyl acrylate, based on 100 parts by weight of the binder. The method of claim 1,
A water-permeable polymer concrete composition, further comprising 0.01 to 5 parts by weight of dibutyltin dilaurate. The method according to claim 1 or 2,
Permeable polymer concrete composition, characterized in that it further comprises 0.01 to 3 parts by weight of isophorone diisocyanate.