KR20070107510A - A mortar for concrete having polyurethane foam and method of thereof - Google Patents

Abstract

A mortar for concrete is provided to achieve the weight reduction of a mortar-coated portion, have excellent soundproof and heat-insulating effects, prevent crack occurrence, and be used for structures for absorbing vibration and impact, preventing corrosion, maintain a temperature of exposed pipe. A mortar for concrete is manufactured by the steps of: (S1) grinding and mixing waste urethane foams and waste styrofoams to obtain urethane foams; (S2) adding an admixture to the squeeze urethane foams; and (S3) mixing the resultant with cement. The waste urethane foams and waste styrofoams are ground into particles(1-10 mm) and mixed in a weight ratio of 5-7:1-3. The admixture contains a water-soluble cellulose ether-based earthlike gray powder as a main component.

Description

A mortar for concrete having polyurethane foam and waste synthetic resin and its manufacturing method

The present invention relates to a mortar for concrete having a urethane pole and waste synthetic resin and a method for manufacturing the same, and more specifically, to recycle the urethane foam and styropol discarded after being used as a heat insulating material and a building panel of home appliances When constructing the ondol floor of apartments or houses, it is mixed with concrete to obtain light weight, excellent sound insulation and insulation effect, prevent cracking, and concrete with urethane pole, which is easy to install and economical. It relates to a mortar and a method for producing the same. Polyurethane foam made from raw materials imported from many foreign currencies is estimated to be about 450,000 to 500,000 tons per year based on the amount of raw materials used in domestic production. In home appliances such as insulation or building panels, etc. are used for various purposes according to their characteristics, but they are very difficult to deal with after-treatment problems, and mainly depend on landfill or incineration.

In general, foamed polyurethane is a thermosetting resin that is insoluble in heat and difficult to recycle, and when burned, nitrogen and aromatic rings in the molecule remain, and in the case of foamed polyurethane used as a heat insulator, Freon (CFC) used as a foaming agent is used in the foam. Will remain. Since the nitrogen contained in urethane generates nitrogen dioxide, as well as environmental pollution, fluorine generates, there are many problems in the treatment by incineration. In addition, in the case of foamed polyurethane, the density is very low, so there is a difficulty in embedding, there is a problem that can not be buried because it is a hardly decomposable material.

Therefore, there is a need to develop a technology that can effectively recycle waste foamed polyurethane.

In this regard, Korean Patent No. 391558 in the name of the applicant discloses a method of making urethane pole concrete with cement, sand, water, and the like on a squeeze urethane pole. However, in the patent, sand is used. Due to the increase in the amount of sand used at the construction site, natural sand shortage is occurring, and thus the necessity of urethane pole concrete that can achieve the same effect without the use of such sand has emerged.

The present invention is to solve the conventional problems and problems as described above, the object of the present invention is to recycle the urethane foam and waste synthetic resin discarded after use to be used in the construction of the flooring of apartments or houses, construction site It provides a mortar for concrete and a method of manufacturing the same, which are mainly composed of urethane poles and waste synthetic resins, which are lightweight and have excellent sound insulation and insulation effect, can prevent cracking, and are easy to install and economical.

In order to achieve the object of the present invention as described above,

Collecting the waste urethane foam and the waste sciropol and pulverizing the mixture to make a urethane pole (S1);

Adding a admixture to the squeeze urethane pole in the step (S1) (S2); And

After the step (S2), including the step of mixing the cement (S3), provides a mortar for concrete with a urethane pole as a main component and a method of manufacturing the same.

In the step (S1), the waste of urethane foam and waste sciropol is preferably 2 to 10 mm, and the mixing ratio of waste urethane foam to waste waste sciropol is preferably mixed at a weight ratio of 5 to 7: 1 to 3. Do.

In addition, the admixture in the step (S2) can be used as long as it has a material separation prevention and fluidizing agent functions, preferably, the main component is a water-soluble cellulose ether-based earth gray powder.

In addition, the mixing ratio of the lightweight urethane poles, admixtures and cements in the above steps (S2) and (S3) is preferably 60 to 80% urethane poles, 1 to 4% admixtures and 16 to 40% cement, in terms of volume ratio. If the pole is less than 60%, the amount of cement is relatively increased, so the economic efficiency is lowered, and if it is more than 80%, the strength is reduced so that it cannot function as concrete, and these ranges are preferable, and the range of the mixture is to prevent separation between materials. And it is preferable to have the above range because it has a function of fluidization, when the amount of cement is 16% or less, the compressive strength is significantly weakened, and when the amount is more than 40%, the amount of relatively lightweight urethane poles is reduced, thereby reducing the effect as a substitute concrete. Because you can not see.

As described above, the urethane pole concrete containing the lightweight urethane pole mixed with the admixture and cement is mixed with water as in the usual method.

The present invention also has a volume ratio of 60 to 80% by volume ratio of waste urethane foam ground to 2 to 8 mm and waste urethane foam in a weight ratio of 5 to 7: 1 to 5, and a material separation and fluidizing agent function. Provided are mortars for concrete mainly composed of urethane poles containing 1 to 4% by volume of admixtures and 19 to 40% by volume of cement.

As mentioned above, the present invention is a method for collecting waste urethane foam generated from waste household appliances and building panels and incinerated into waste and making it into a heat insulating concrete construction material and a urethane pole concrete manufactured therefrom. It was developed.

Hereinafter, with reference to the preferred embodiment will be described in detail with respect to the concrete mortar and the method of manufacturing the light-weight urethane pole according to the present invention.

The floor insulation materials currently being constructed in apartments and houses include Pole Concrete, Bubble Concrete, Bubble Pole Concrete, Fiber Foam Concrete, EVA Pole Concrete, BST Pole Concrete, and Ureshell Foam Concrete. Among them, foam concrete has been used a lot because of its simplicity in construction.

In order to solve this problem, many additives were added to aerated concrete, but cracks could not be effectively removed.

Therefore, in recent years, Paul concrete has been preferred to foam concrete, but the construction of Pole concrete is also faced with a lot of external conditions due to the insufficiency of on-site management and lack of product management.

The present invention solves this problem at a glance, and provides a mortar capable of manufacturing lightweight concrete such as a floor / wall insulation brick that is almost perfect in terms of productability and workability.

To this end, the present invention recycled waste urethane foam discharged from waste household appliances, especially waste refrigerators or building panels to facilitate the use as a building material, when using it as a building material, such as light weight, excellent sound insulation effect and insulation Therefore, it would be appropriate to develop insulated concrete that can provide various advantages such as workability and construction. Therefore, the waste urethane foam was recycled to make lightweight insulating urethane pole concrete and used as flooring, dry panels and bricks on the floors of apartment houses such as apartments. In particular, a supply and demand problem is raised, and a method and a mortar to provide a sand-free urethane pole concrete, which has a lot of problems in supply in the construction site is provided.

Example

According to the present invention, first, waste urethane foam generated from waste household appliances or building panels is collected and ground to a size of about 1 to 10 mm with a grinder, and waste polystyrene (Schiropol) is similarly collected to be about 1 to 10 mm with a grinder. Crush to size. like this

The ground urethane foam and styropol are mixed at a weight ratio of 7: 3 to make a lightweight urethane pole (S.U.P).

After mixing the lightweight urethane pole and the mixing agent and cement in the ratio shown in Table 1, the water is mixed in an appropriate ratio.

Table 1

                                                       (Unit:%: Volume Ratio)

Waste Urethane Foam: Waste Sponge Foam  Urethane Pole Admixture cement One One One 51 One 48 2 7 3 60 4 36 3 6 4 60 3 37 4 8 2 65 4 31 5 5 4 70 3 27 6 4 2 78 3 19 7 6 One 85 4 11

Admixtures are used for the purpose of concrete properties, workability, bleeding, condensation time, compressive strength, length change, neutralization, freeze thawing and chemical erosion, heat durability, and water deterioration. It has the function of a glidant, and the earth gray powder whose main component is a water-soluble cellulose ether series is used. As cement, KSL 5201 has passed, and it is a fresh material within 2 months after manufacture. Use mixed water that is not harmful for concrete.

Measurement of the physical properties of the concrete using the mortar prepared as described above was carried out in accordance with the regulations of KSL 5105, KSL 5207, KSL 5104, KSF 2451, KSL 9016, KSF 2451, KSF 2424, KSF 2810.

These result tables are shown in Table 2 for comparison with the conventional ones.

The mixing of the materials is carried out using a concrete mixer on the ground of the construction site, and the mixed lightweight insulation urethane pole concrete is pumped from the mixing place to each place so that material separation does not occur using a specially developed pump. In use, if the material pushed by the squeeze pump comes up to the construction site, use the equipment to spread it evenly and compact it with a stick. If there is severe material separation during transportation or placing of lightweight insulating urethane pole concrete, it is rubbed and made homogeneous. In addition, to prevent the mixing of miscellaneous goods in the concrete, and wet the place where there is concern of absorption. When working in two or more stages, cast the upper concrete before solidifying the lower concrete so that it is integrated.

After pouring, it should be cured so that there is no sudden change of temperature, and care should be taken not to apply vibration, shock or heavy load during curing.

Curing period is at least 3 days in summer (below 30 ℃) and 4-5 days in winter (more than 1 ℃). This process is almost the same as general concrete curing process.

Results and Discussion

Table 2 below shows the results of measuring the properties of curing urethane pole concrete prepared according to an embodiment of the present invention as described above.

TABLE 2

Concrete type application item Plain concrete Patent number 391558 Air bubble concrete Mortar use concrete of the invention Lightweight-Unit weight (t / m ³ ) 2.3 ~ 2.4 0.4-1.8 0.4-1.2 0.4-2.0 Dynamics-Compressive Strength (kgf / cm ² ) 50-400 5-250 5 ~ 45 11-200 Insulation-Thermal Conductivity (kcal / m ² h ℃) 1.3 to 1.4 0.08 ~ 1 0.12-0.2 0.08 ~ 1.2 Moisture Proof-Absorption Rate (%) 10-18 5-10 40-60 4-9 Sound insulation-Sound absorption rate (%) 0.01 ~ 0.04 0.09-0.19 0.2-0.8 0.07-0.15 Dry Shrinkage-28 Days Shrinkage 4 ~ 6 0 4 ~ 8 0 Durability-Freeze Thawing Resistance (%) 70-80 90 50 87 Fire Resistance-Compressive Strength (600 ℃, 2h) (%) 10-20 50 50 58 Dustproof-Energy 78 45 46

Referring to Table 1, the urethane pole concrete using the mortar according to the present invention has a specific gravity of 0.4 to 2.0, while specific gravity of concrete is 2.3 to 2.4, and a concrete load of 1/2 to 1/3 It is possible to reduce the construction cost by reducing the weight below. In addition, the strength can be freely changed from 11 to 200 kgf / cm ² depending on the mixing of concrete, and the thermal conductivity is about 1/2 to 1/3 (0.08 to 1.2 kcal /) of general concrete (1.4 kcal / m ² h ° C). m ² h ° C.), the adiabatic effect is large. In addition, the adhesion to mortar is large, and uniform mixing prevents cracking and lifting. This is possible without the addition of sand as it can have an effect similar to the applicant's patent 391558.

In addition, the urethane pole concrete using a mortar according to the present invention is very low moisture-proof than other concrete is not affected by condensation, mold or bacteria, and sound insulation due to internal impact is the best among existing lightweight insulating concrete. In addition, there is no shrinkage action, no cracking occurs due to expansion and contraction, and the hardening time is short (3 to 4 days), which shortens the air and makes it easier to proceed to other subsequent processes. In addition, the freezing and melting resistance index is much better than other concrete, there is no fear of condensation and freezing, and the shock energy absorption is very large, so the vibration resistance by vibration energy absorption is very good.

As described above, the lightweight insulation urethane pole concrete using the mortar according to the present invention, by collecting the waste urethane foam contained in the waste refrigerator or building panel, etc. and using it as a construction material of the insulation concrete, It can be constructed with lightweight insulating concrete, and it is very economical in terms of resource recycling.

In other words, the lightweight insulating urethane pole concrete using the mortar according to the present invention, by specially crushing the high-quality insulating material urethane to waste styropol and mixed in an appropriate amount to increase the sound insulation, crack prevention effect, insulation and strength, PPS admixture developed by Applicant is added to increase material separation and fluidization, resulting in flying of materials caused by existing pole concrete construction methods, construction surface poles, and damage to other constructions when working with small rear car mixers (wall plasterboard, Damage to door frame frame, chassis, etc.), heterogeneity of compounding, etc. are minimized. In addition, since the effects as concrete can be sufficiently exhibited without using sand, which is a problem of supply and demand, it is possible to describe a significant effect in terms of economy.

Therefore, the mortar according to the present invention is applicable to the construction and apartment floors, roof insulation concrete, parking lot floor, basement floor in the construction field, civil engineering sectors tunnel tunneling, backfill for settlement prevention, water and sewage freeze protection, exposed pipe It can be applied to the structure for insulation and corrosion prevention, vibration and shock absorption.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention described in the claims below. It will be appreciated.

Claims (6)

A method of producing a mortar for concrete, comprising urethane poles as a main component, characterized in that the urethane foam is made by pulverizing and mixing waste urethane foam and waste styropole, and then adding a admixture to the squeeze urethane pole. The main component of claim 1, wherein the waste urethane foam and waste styropol are pulverized in a range of 1 to 10 mm, and the mixing of the waste pufetan foam and waste styropol is in a weight ratio of 5 to 7: 1 to 3. Method for producing mortar for concrete. The method of claim 1, wherein the admixture is a clay mortar powder having a urethane pole as a main component, the main component being a water-soluble cellulose ether series. According to claim 1, wherein the mixing ratio of the urethane poles, admixtures and cement is 60 to 80% urethane poles, 1 to 4% admixtures, 19 to 40% cement as a main component for concrete Mortar production method. Urethane pole concrete using waste urethane foam and waste sciropol, 60 ~ 80% of squeeze urethane pole mixed with waste urethane foam and waste sciropol with weight ratio of 5-7: 1 ~ 3, respectively, with admixture Mortar for concrete, mainly composed of urethane poles, characterized by 1 to 4% and 19 to 40% cement. 6. The mortar for concrete according to claim 5, wherein the admixture is a urethane pole powder whose main component is a water-soluble cellulose ether series.