KR20040043768A - Cast-in-place thermal insulation reducing noise and method for manufacturing the same - Google Patents

Abstract

PURPOSE: Provided is a manufacturing method of cast-in-place thermal insulation materials reducing noise excellent in strength, workability and homogeneity by using high elasticity materials, lightweight aggregate for heat insulation and cement admixture. CONSTITUTION: The cast-in-place thermal insulation materials reducing noise comprise the components of: (i) 50-80vol% of lightweight aggregate(3mm size) with excellent heat insulation such as EPS, EVA, rubber chip, urethane chip or ureaform chip; (ii) 1-7vol% of cement; (iii) 2-10vol%(based on the cement) of cement admixture for improving strength, selected from alumina-based mixture(or compound) and gypsum-based mixture(or compound); (iv) 1-5vol% of high elastic binder selected from acrylic acid, methacrylic acid and acrylate ester(methyl, ethyl, n-butyl, isobutyl, t-butyl, 2-ethyl hexyl, etc.); (v) 8-12vol% of water; (vi) 4-34vol% of foams. The heat insulation materials are produced by mixing the above materials(i-iv) to get a slurry; adding 4-34vol% of foams formed by foaming agent and mixing.

Description

Cast-in-place thermal insulation reducing noise and method for manufacturing the same

The present invention relates to a noise reduction type heat insulating material that can be cast in place, and more particularly, a light aggregate having a high thermal insulation property (hereinafter referred to as "light insulation for high insulation") and a cement admixture capable of increasing strength and elasticity after curing. The present invention relates to a noise reduction heat insulating material and a method for manufacturing the same, by adding a predetermined amount of a binder (hereinafter referred to as a "high elastic binder") that can be promoted to have a predetermined compressive strength while satisfying heat insulating performance and sound insulating performance simultaneously.

In general, lightweight foam concrete is used as the insulator for field casting used for construction or civil engineering.In construction, it is used for the insulation layer of ondol, the insulation of slab or the protection of the waterproof layer, and the cushioning to prevent vibration. It is used for the protection and insulation of gas pipes, water and sewage pipes.

However, when the insulation layer of the ondol is composed of only lightweight foam concrete, insulation performance is degraded and interlayer noise is severely generated. Generally, as shown in FIG. 1, the ondol structure has a sound insulation material under the heat sink 40. 10) and the insulating material 20, respectively, after the construction of the lightweight foam concrete 30 to reinforce the thermal insulation performance and the sound insulation between the layers. Reference numerals 50 and 60 denote protective mortars and veneer floors, respectively.

Therefore, the conventional ondol structure is laid a sound insulating material 10 of 10mm thickness on the slab concrete, the 10mm thick insulating material 20 is placed on the top, and then 40 to 50mm lightweight foam concrete 30 on the top again Due to the complicated construction process to be poured, not only the quality is heterogeneous but also the problem of increasing the interlayer thickness arises.

In addition, the lightweight foam concrete 30 has a high content of cement and low compressive strength and low thermal insulation, and is vulnerable to local load due to the sponge phenomenon of the sound insulating material 10 and the heat insulating material 20 installed in the lower portion. As a result, a lot of cracks are generated due to breakage during the subsequent work, and the cracks thus generated have a great influence on the quality of the top floor mortar 50, and there are many negative views on the limitations of application and applicability evaluation. .

In addition, according to Article 21 of the revised Ordinance of the Regulations on the Facility Standard of Building No. 70, etc. In the insulation structure, the thermal conductivity of the lightweight foamed concrete should be 0.1 kcal / mh ° C. or less to satisfy the thermal permeability specified in the above regulations. However, if the current construction ratio of lightweight foamed concrete is more than 0.5, there is a problem that it is not easy to meet the thermal conductivity of 0.1kcal / mh ℃ or less, which is the standard prescribed by the Ministry of Construction and Transportation.

Accordingly, an object of the present invention is to solve the above problems, and to provide a noise reduction insulating material and a method of manufacturing the same, which improves workability by solving heat insulation and sound insulation at the same time, and has a homogeneous quality.

1 is an ondol structure using a conventional lightweight foam concrete.

Figure 2 is an ondol structure according to an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

10: sound insulation material 20: heat insulating material

30: light weight foam concrete 40: heat sink

50: mortar 60: veneer floor

70: noise reduction insulation

Noise reduction type heat insulating material according to the present invention for achieving the above object, about 50 to 80 vol% of high-intensity lightweight aggregate, about 1 to 7 vol% of cement, and about 2 to 10 vol% of the cement admixture And about 1 to 5 vol% of the high elastic binder, about 4 to 34 vol% of the bubble amount, and about 8 to 12 vol% of the mixed water.

In addition, the manufacturing method of the noise-reducing insulation material according to the present invention is about 50 to 80 vol% of high-intensity lightweight aggregate, about 1 to 7 vol% of cement, about 2 to 10 vol% of the cement admixture and Forming a slurry by adding about 1 to 5 vol% of a high elastic binder and about 8 to 12 vol% of mixed water, and adding about 4 to 34 vol% of a bubble group generated by a foaming agent to the slurry for a predetermined time. It characterized in that it comprises a step of kneading during.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. 2. 2 shows an ondol structure according to an embodiment of the present invention.

As shown in Figure 2, one embodiment of the present invention can replace the sound insulating material 10, heat insulating material 20 and lightweight foam concrete 30 used in the conventional ondol structure (see Figure 1) with a single material Regarding the noise reduction heat insulating material 70, its configuration and operation will be described in detail.

Noise reduction heat insulating material according to the present invention, a high-intensity lightweight aggregate about 50 to 80 vol%, cement about 1 to 7 vol%, cement admixture of about 2 to 10 vol% of the cement, high elastic binder about 1 To 5 vol%, bubble amount of about 4 to 34 vol%, and mixed water of about 8 to 12 vol%.

The high thermal insulation lightweight aggregate has excellent specificity such as low weight and low thermal conductivity, such as styrofoam or foamed synthetic resin, and has excellent thermal insulation performance. Such lightweight insulation for high insulation is EPS, EVA, Rubber Chips, Urethane chips, Ureafoam chips and the like can be used.

On the other hand, the present invention may cause a difference in quality depending on the size of the particles of the high thermal insulation lightweight aggregate, the size of the particles of the high thermal insulation lightweight aggregate is preferably used 3 to 5mm in diameter.

The high elastic binder improves tensile and flexural strength and compressive strength when combined with portland cement products, and improves adhesion and durability, decreases deterioration due to shrinkage, cracking and freezing melting, improves alkali resistance, and expresses elasticity during curing. By having, the amount of cement used is minimized, and after curing, elasticity is improved to improve sound insulation performance.

Acrylic acid, Methacrylic acid, Acrylate ester (methyl, ethyl, n-butyl, Isobutyl, t-butyl, 2-ethyl hexyl, Desyl, 2-Ethoxy, ethyl, 2-Hydroxy propyl Acrylate) are used as the high elastic binder. Can be.

At this time, since the high elastic modulus has a high elastic modulus after curing, it has a high sound insulation effect, and thus, it is preferable to have a proper elastic modulus in the cured body by controlling the properties and the amount of the high elastic binder.

Since the cement admixture promotes hydration to produce high initial strength, thereby minimizing the amount of cement used and enhancing the strength, alumina-based mixtures or compounds, gypsum-based mixtures or compounds may be used.

Hereinafter, looking at the method of manufacturing a noise reduction insulation for building according to an embodiment of the present invention.

The slurry is made by adding about 67 vol% of light aggregate, about 5 vol% of cement, 0.3 vol% of cement admixture (alumina), 1.9 vol% of acrylic binder, and 9.5 vol% of mixed water. Then, by adding about 16.3 vol% of bubbles made by the foaming agent to the slurry and kneading for about 2 minutes, a noise reduction heat insulating material is produced.

Then, it is poured into a mold having a diameter of about 100 mm and a height of about 200 mm to be molded, and stored for about 48 hours in a damp or humid chamber at room temperature, and then the mold is removed, and then stored in a damp or damp chamber for about 5 days. And then stored for about 28 days in the atmosphere of the laboratory at a temperature of about 18-25 ° C. and a relative humidity of about 40-80%.

Hereinafter, by comparing the physical properties of the noise reduction heat insulating material of the present invention and the conventional lightweight foam concrete manufactured by the method as described above are shown in Table 1 below.

division Density (g / cm 3) Compressive Strength (28 days) (kg / ㎠) Thermal Conductivity (kcal / mhr ℃) Impact sound reduction dB (A) weight Lightweight Noise reduction heat insulation material according to the present invention 0.298 6.5 0.053 6.3 15.4 Lightweight Foam Concrete 0.5 15 0.12 0.2 5.4

Therefore, according to the present invention as described above, by minimizing the amount of cement used by the cement admixture and the high elastic binder and maximizing the amount of light aggregate for relatively high insulation, not only can obtain higher heat insulation performance than the prior art, but also harden After the sound insulation performance is improved by the high elastic binder having elasticity, the thermal insulation performance and the sound insulation performance can be secured simultaneously.

In addition, the above performance can be secured in a single process called on-site casting, which leads to shortening of air and cost, and ensures homogeneous quality due to improved workability.

Claims (7)

About 50 to 80 vol% lightweight aggregate for high insulation, About 1 to 7 vol% of cement, About 2 to 10 vol% of the cement admixture, About 1-5 vol% of high elastic binder, Bubble amount of about 4 to 34 vol%, and Mixed water about 8 to 12 vol% Noise reduction heat insulating material comprising a. The method of claim 1, The noise reduction type heat insulating material, Noise reduction insulation, characterized in that further comprising about 2 to 10 vol% of the cement admixture based on cement. The method of claim 1, The high-intensity lightweight aggregate is noise reduction type heat insulating material, characterized in that one of EPS, EVA, Rubber chip, Urethane chip, Ureafoam chip is used. The method of claim 1, The high elastic binder is one of Acrylic acid, Methacrylic acid, Acrylate ester (methyl, ethyl, n-butyl, Isobutyl, t-butyl, 2-ethyl hexyl, Desyl, 2-Ethoxy, ethyl, 2-Hydroxy propyl Acrylate) Noise reduction heat insulating material characterized in that it is. The method of claim 1, The cement admixture is noise-insulating type heat insulating material, characterized in that one of the alumina-based mixture or compound, gypsum-based mixture or compound is used. The manufacturing method of the noise reduction type heat insulating material, About 50 to 80 vol% of high-intensity lightweight aggregate, about 1 to 7 vol% of cement, about 2 to 10 vol% of the cement admixture, about 1 to 5 vol% of high elastic binder, about 8 to about mixed water Adding 12 vol% to form a slurry; And Adding about 4 to 34 vol% of the bubble group generated by the foaming agent to the slurry and kneading for a predetermined time; Method for producing a noise reduction heat insulating material comprising a. The method according to claim 6, The manufacturing method of the noise reduction insulation, The method of claim 1, further comprising the step of adding about 1 to 2 vol% of the high elastic binder.