JPH0330664B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to improvement of composite insulation board materials for construction.
It is used in industrial fields that manufacture, sell, and use building materials. (Prior art) It is well known that in recent years, so-called ALC boards (lightweight aerated concrete boards) have been used in large quantities for the purpose of reducing the weight of buildings, shortening construction periods, and saving energy. - It is well known that the demand for C board material has been increasing recently because it is extremely lightweight and has many advantages such as excellent heat insulation properties and ease of cutting and nailing. However, since the ALC board contains many air bubbles, its strength is not necessarily satisfactory, and it also lacks water resistance and non-permeability, making it extremely susceptible to moisture and water permeability. Although it exhibits excellent heat insulation properties when dry, it has a serious drawback in that its heat insulation properties and strength drop significantly when wet. Therefore, in order to improve the strength of ALC board materials,
Products equipped with reinforcing materials such as reinforcing bars and wire mesh have been developed and provided, but these reinforcing materials not only become an obstacle when cutting and nailing, but also cause weaknesses in areas where no reinforcing material is present, such as corners. cannot be improved at all, and the interior reinforcement is uneconomical as it increases the amount of materials and processes required. In addition, in order to improve water resistance and prevent moisture,
Although methods such as applying a waterproof paint or coating with a waterproof film have been used, there has been no provision yet that can maintain a sufficiently satisfactory level of good heat insulation properties when wet. (Problems to be solved by the invention) The present invention was researched and developed in order to solve the above-mentioned drawbacks of ALC board materials at once.
The purpose of the present invention is to provide an extremely useful composite insulation board for construction that has superior bending strength, compressive strength, water resistance, heat insulation, workability, etc. compared to ALC board. (Means for Solving the Problems) In order to achieve the above object, the composite insulation board material for construction according to the present invention can be used for construction board materials such as asbestos cement board, gypsum board board, wood chip cement board, iron board, plywood, etc. On top of this, 10 to 50 parts by weight of asphalt aqueous emulsion is added to 100 parts by weight of cement, and to this, the required amount of water, aggregate, and 0.001 to 5 parts by weight of a protein-based air entraining agent are added. A lightweight mortar mixture is poured and hardened, and the lightweight mortar mixture layer is integrally layered on a construction board. In the present invention, the range of components of the lightweight mortar mixture is defined to the above ratios based on the following reasons. If the amount of asphalt aqueous emulsion added to 100 parts by weight of cement is less than 10 parts by weight,
The strength of the foam in the product plate material is low and its water absorption is high, making it impossible to obtain satisfactory performance values.
This is because it has been found that if the amount exceeds 50 parts by weight, further improvement in performance cannot be expected and costs increase. In addition, if the amount of protein-based air entraining agent additive is less than 0.001 part by weight per 100 parts by weight of cement,
If the specific gravity of the product plate material increases, the insulation properties will decrease, and the desired performance cannot be expected.If it exceeds 5 parts by weight, the specific gravity will decrease and the insulation properties will improve, but the strength of the plate material will decrease. However, at the current stage of research, it has been found that there are problems in terms of strength. (Example) Approximately 0.7 kg/ ^m2 of cationic filler (a mixture of cement and cationic acrylic synthetic resin water-based emulsion) was applied to plywood with a thickness of 5.5 mm, and then, on the coated surface, 100 parts by weight of cement was applied. , 30 parts by weight of water-repellent asphalt emulsion consisting of 90% asphalt emulsion and 10% paraffin emulsion, 70 parts by weight of fly ash, 7 parts by weight of silica sand
50 parts by weight of a protein-based air entraining agent, 0.01 part by weight of alkali-resistant glass fiber, and 60 parts by weight of water are poured into the uncured lightweight mortar mixture, which is thoroughly kneaded. A composite thermal insulation board for construction was obtained which was made by integrally layering a mortar mixture. The following table shows the comparison test results between the lightweight mortar layer of this composite insulation board for construction and commercially available ALC board.

[Table] In the present invention, in order to improve the adhesive strength between the upper lightweight mortar layer and the base construction board material, the above lightweight mortar mixture is applied after applying an adhesive to the surface of the base construction board material. Furthermore, if other fire-resistant construction board materials such as gypsum board or tiles are laminated on the surface of the lightweight mortar mixture layer layered on the base construction board material in the above example, insulation and fire resistance can be improved. Further improvements can be made, the appearance is also good, and the construction period can be shortened by saving labor in the process. (Effects of the Invention) As is clear from the detailed description above, the composite insulation board for construction according to the present invention is superior to the conventional ALC, due to the unique blending components and blending ratio of the lightweight mortar mixture layered on the base board. Compared to board materials, it has outstanding properties in terms of heat insulation and fire resistance, and is also superior in terms of bending strength, compressive strength, workability, etc., so it can exhibit unparalleled effects as a construction board material. It is something. Furthermore, in the present invention, since a protein-based air entraining agent is used as a means for containing air bubbles, the diameter of the generated air bubbles can be freely changed by adjusting the amount added, stirring time, and stirring speed. It has the great advantage of being able to easily adjust the above properties, and since all the bubbles produced by the protein-based air entraining agent are closed cells, the above heat insulation properties and water resistance are further improved. It is.

Claims (1)

[Claims] 1. Cement on construction board materials such as asbestos-cement board, gypsum board board, wood chip cement board, iron board, plywood, etc.
An uncured lightweight mortar mixture is prepared by adding 10 to 50 parts by weight of asphalt aqueous emulsion to 100 parts by weight, and adding the required amount of water, aggregate, and 0.001 to 5 parts by weight of a protein-based air entraining agent. A composite insulation board for construction, which is formed by pouring and curing the lightweight mortar mixture layer on top of the board.