KR20100046939A

KR20100046939A - Manufacturing methods for light weight panel of inorganic cement composites

Info

Publication number: KR20100046939A
Application number: KR1020080105987A
Authority: KR
Inventors: 김성중
Original assignee: 진흥미래건설(주)
Priority date: 2008-10-28
Filing date: 2008-10-28
Publication date: 2010-05-07
Also published as: KR101020653B1

Abstract

PURPOSE: A method for manufacturing an inorganic cement lightweight panel is provided to ensure high porosity and liquidity at low cement water ratio and to uniformly distribute materials and pores in mortar. CONSTITUTION: A manufacturing method of an inorganic cement lightweight panel comprises: a step of mixing 40-50 weight parts of combined water, 0.05-0.2 weight parts of animal nature foaming agent for forming closed pore, 0.1-2 weight parts of naphthalene superplasticizer, 0.01-0.1 weight parts of polysaccharide group thickener in a dry mortar containing 25-45 weight% of normal portland cement and 55-75 weight% of perlite; and a step of molding the mixture to a mold frame.

Description

Manufacturing Method for Inorganic Cement-based Lightweight Panels {Manufacturing Methods for Light weight panel of Inorganic Cement composites}

The present invention relates to a method for manufacturing an inorganic cement-based lightweight panel, and more particularly, by forming a large amount of pores in the cement hardened body, as well as the reduction of the weight required for building materials in recent years, as well as noise reduction, fire resistance and heat insulation. The present invention relates to a method for producing an inorganic cement fire-resistant lightweight panel that can provide a comfortable and comfortable space by imparting such functionality.

Conventional fireproof light weight panel manufacturing technology used glass wool and glass fiber resistant to fire in the early days, but this is no longer applied due to the harmfulness of the human body. Is not suitable.

Since then, a number of lightweight technologies have been introduced due to the addition of lightweight aggregates. However, the use of lightweight aggregates makes it difficult to obtain low specific gravity materials, and the porous lightweight aggregates have high absorption rates. Or material separation caused by specific gravity difference was severe and the strength was low after hardening, which showed physical fragility easily broken or broken.

It is manufactured by mixing spherical particles of styrofoam into cement mortar on a lightweight partition panel, which is lightweight but may cause smoke and poisonous gases due to the mixed styrofoam in the event of a fire. Concrete) is most of the composition is inorganic and there are many pores in the interior light weight and excellent thermal insulation has been widely applied, but water resistance and hygroscopic resistance is poor and the heat resistance temperature is about 800 ~ 900 ℃ or less.

Foam concrete, which was cured by adding a large amount of bubbles to cement mortar using only animal foaming agents, was often applied as a flooring material for apartment houses because of its excellent thermal insulation and soundproofing, but was not commercialized as a panel due to process problems. It was difficult to evenly distribute a large amount of air bubbles caused by the foaming agent by spontaneous blistering before curing or when vibrating for vibrating for material filling.

An object of the present invention is to provide a method for producing an inorganic cement-based lightweight refractory panel that has a high porosity and improves the problems caused by the high absorption of the ferrite by using the inorganic light-weight aggregate, the fluidity at a low water ratio.

Another object of the present invention is to provide a method for producing an inorganic cement-based lightweight fireproof panel that can evenly distribute materials and pores in the mortar by suppressing material separation between materials having different specific gravity during mixing. It is done.

In order to achieve the above technical problem, the present invention, with respect to dry mortar consisting of 25 to 45% by weight of ordinary portland cement and 55 to 75% by weight of ferrite, 40 to 50 parts by weight of the compounding agent, 0.05 to 0.2 Provided is a method for producing an inorganic cement-based lightweight fireproof panel comprising the steps of mixing by weight, 0.1 to 2 parts by weight of a naphthalene-based fluidizing agent, 0.01 to 0.1 parts by weight of a polysaccharide thickener, and molding the mixture into a mold.

According to the present invention, an inorganic cement-based lightweight fireproof panel having high porosity and securing fluidity at a low water ratio can be manufactured, and even distribution of materials and pores in mortar by suppressing material separation between materials having different specific gravity during the manufacturing process. It is possible to manufacture an inorganic cement-based lightweight fireproof panel that can suppress the breakage phenomenon. Accordingly, it is possible to manufacture lightweight and highly durable panels through securing safety pores, to ensure a residential environment with sound insulation effect due to the large amount of pores inside the mortar, and to secure energy by using inorganic porous fireproof insulation panels. Savings and fire damage can be reduced.

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

The inorganic cement fire-resistant lightweight panel of the present invention is produced by mixing a blending water, a naphthalene fluidizing agent, an animal foaming agent for forming a waste hole, and a polysaccharide thickener with respect to a dry mortar composed of ordinary portland cement and a ferrite.

In the present invention, the weight reduction is achieved by adding perlite, which is an inorganic lightweight aggregate, to the cement mortar and injecting bubbles artificially formed through animal foaming agents. These two additives are complementary.

In addition, the present invention was applied to the naphthalene-based fluidizing agent in order to solve the problem of the high absorbing power of the ferrite, it was possible to ensure the fluidity at a low water ratio.

In addition, in the present invention, by using a polysaccharide thickener (Starch) thickener to reduce the material separation between materials having different specific gravity in the mixing process, it is possible to evenly distribute the material and pores in the mortar. In addition, the polysaccharide thickener of the present invention can reduce the phenomena due to the thickening effect in the mortar.

In the present invention, it is preferable to include 25 to 45% by weight of ordinary portland cement and 55 to 75% by weight of perlite in mortar.

In the present invention, it is preferable to use the perlite having a particle size adjusted. Preferred particle size ranges in the present invention are illustrated in the examples below.

Example

The method for manufacturing a refractory lightweight panel according to a preferred embodiment of the present invention proceeds in the following order.

(1) cement weighing, input

(2) perlite weight measurement

(3) 50% perlite and thickener

(4) dry mixing cement and perlite in agitator

(5) Mixed water weight measurement

(6) glidant weight measurement

(7) Add glidant to mixed water

(8) Add mixed water and glidant to cement and perlite

(9) Mix cement, perlite (50%) with mixed water and fluidization in stirrer

(10) Dividing the remaining 50% of the ferrite by 10%

(11) Mixing for 3 minutes so that cement and perlite can be sufficiently mixed in the stirrer.

(12) Foaming agent input

(13) mixed

In the above process, when the perlite in the stirrer was initially added 50%, the latter was divided by 10% in the second half, and the cement, by ensuring sufficient mixing time to sufficiently mix the cement, perlite in the stirrer before adding the foaming agent The ferrite is sufficiently mixed, and exhibits sufficient fluidity when the foaming agent is added, thereby exhibiting fluidity capable of smoothly filling the refractory plate mold.

Perlite is porous and lightweight aggregate and has excellent performance as a aggregate of lightweight refractory board because of its excellent fire resistance. However, perlite is made of porous and absorbs much water so that the initial stirring time of cement, perlite, mixed water and fluidizing agent is sufficient. In the case of adding ferrite, it is better to express the flow performance of mortar by adding it in small portions and stirring it sufficiently, rather than adding all the quantity at once.

Experimental Example 1 (Physical Characteristics According to the Added Amount of Animal Foam)

In order to determine the change in the physical properties of the panel according to the amount of the animal foaming agent was added to the amount of the foaming agent by 0.05% to 0.15% by weight, the compounding ratio (% by weight) is shown in Table 1. The flow performance, density and compressive strength according to the amount of foaming agent were confirmed and the results are shown in Table 2. In the present embodiment, a foaming agent was used as Italian brand name Esapon 1850 from Lamberti, a fluidizing agent was CMC-PC of Chemicon Corporation, and Foxcrete S100 of Avebe, Netherlands as a thickener. Used. Flowability was measured by the flow measurement method presented in KSL 5105 (Test method for compressive strength of hydraulic cement mortar), and density was measured for 7 days in the laboratory (temperature After curing at 25 ℃, humidity: 50%) the density was calculated by measuring the weight of the compressive strength specimens, and the daily strength was also measured by KSL 5105 (Test method for compressive strength of hydraulic cement mortar).

combination Fluidity (mm) Density (g / cm 3) Daily strength (kg / ㎠) Remarks One 240 0.853 22.8 Slightly separated perlite 2 245 0.863 25.5 Slightly separated perlite 3 236 0.820 23.6 Slightly separated perlite 4 220 0.795 21.5 Good flow, no material separation 5 216 0.775 19.8 Good flow, no material separation 6 215 0.715 17.2 Good flow, no material separation 7 200 0.690 17.6 Good flow, no material separation 8 197 0.720 18.6 Slightly more bubbles. 9 186 0.680 17.2 Slightly more bubbles. Reduced fluid performance. 10 189 0.690 17.0 Poor flow performance due to many bubbles 11 185 0.645 16.5 Poor flow performance due to many bubbles 12 174 0.495 8.6 Poor flow performance due to many bubbles

According to the experimental results according to the addition amount of the animal foaming agent, it can be seen that some perlite separation occurs in the first to the third formulations in which the amount of the animal foaming agent added is 0.05% to 0.07%. However, in the 4 to 7 formulations in which the amount of animal foaming agent added was 0.08% to 0.11%, a good flow condition was observed, and no material separation occurred. In addition, in the formulations Nos. 11 to 11, in which the amount of the animal foaming agent was added in 0.12% to 0.15%, the amount of foaming was high, indicating that the fluid performance decreased. In addition, the density of the specimen decreased as the amount of animal foaming agent added increased. In particular, the flow performance was deteriorated at 0.10% and 0.11% of the amount of animal foaming agent, but the target density of the refractory board material was reached. However, the compressive strength did not reach the target strength in all formulations.

In addition to the foaming caused by the animal foaming agent in the present invention, a porous inorganic aggregate was used as a substitute for the fine aggregate of mortar, and in particular, it was used in three stages by particle size. Perlite is a material widely used as a lightweight filler, which is lower in specific gravity compared to bubbles generated by animal foaming agents, but the pore structure formed in the perlite is stably present in the mortar and conflicts with dry shrinkage caused by cement hydration. Can give

Experimental Example 2 (Physical Characteristics by Ferrite Particle Size Adjustment)

In order to adjust the particle size of the ferrite was adjusted as shown in Table 3 by adjusting the addition amount of each particle size, the fluidity and other physical properties were measured according to the results are shown in Table 4.

TABLE 3

TABLE 4

As a result of measuring the initial flow performance and strength by applying 0.3 ~ 1.2mm particle size and 1.2 ~ 2.5mm particle size, the density decreased as the 1.2 ~ 2.5mm particle size increased. However, the flow performance was increased even when the ratio of perlite of 1.2 ~ 2.5㎜ particle size increased, but the flow performance decreased as the perlite separation occurred above a certain ratio. In the above formulation, the third formulation showed the lowest density with excellent flow performance. However, it did not meet the development target density and strength.

In the mortar, materials having different specific gravity are mixed with water and material separation occurs due to the mixing process during molding or external pressure applied during mixing. Can vary. In the present invention, a polysaccharide-based thickener is applied so as to be evenly filled in a mold without separation between materials. This is unlike a conventional one-dimensional molecular structure of the methyl cellulose thickener. Since the structure is formed, the yield value is increased by reacting with cement particles rather than simply increasing the viscosity in the swelling process with water, as shown in FIG. 2. Because of the flow characteristics, it is possible to fill the material evenly in the desired mold without material separation.

Experimental Example 3

The fire resistance test of the refractory plate manufactured by the second combination of Experimental Example 2 according to KS F 2257-8: 2004 (Fire resistance test method-performance condition of vertical non-bearing compartment member) The same result was obtained.

1 is a diagram schematically illustrating the molecular structure of a polysaccharide thickener.

2 is a graph for explaining the thickening mechanism of the polysaccharide thickener.

Claims

40 to 50 parts by weight of the blended water, 0.05 to 0.2 parts by weight of animal foaming agent for forming waste holes, and 0.1 to 2 parts by weight of naphthalene-based fluidizing agent based on dry mortar comprising 25 to 45% by weight of ordinary portland cement and 55 to 75% by weight of perlite. Part, a method for producing an inorganic cement-based lightweight fireproof panel comprising the step of mixing 0.01 to 0.1 parts by weight of a polysaccharide thickener and molding the mixture into a mold.