JPS6038355B2 - Surface finishing method for lightweight foam concrete - Google Patents

Description

[Detailed Description of the Invention] As a base material for recent building structures, foamed lightweight concrete, so-called ALC, has emerged in the construction industry with the popular phrase that it satisfies physical properties such as light weight, heat insulation, and soundproofing, and its popularity is increasing. It is increasing.

This ALC Motomura is a foamed lightweight concrete that uses cement as the main raw material, arranges aggregate, adds a foaming agent, performs autoclave curing, and is foam-molded. Although the physical properties of this foamed lightweight concrete (hereinafter referred to as ALC) are as shown in Table 1, there are aspects in which the waterproofness and strength are unsatisfactory. In order to use ALC (see Table 1) as a base material for building structures, from the above points, ALC is used for the purpose of improving the waterproofness and strength of the surface.
It is common to apply a finishing treatment to the LC surface.

The surface finishing methods used include spraying a synthetic resin liquid sealant and then applying a synthetic resin wall material or finishing with cement mortar, but synthetic resins are prone to deterioration, cracking, peeling, etc. Cement mortar has drawbacks such as cracking and spalling, both of which are poor in durability, and improvements in surface finishing materials and construction methods have been desired. This invention proposes a surface finishing method using a surface finishing material for ALC that can meet the above-mentioned needs. In other words, it consists of compound A, which is a mixture of Bortland cement with the raw materials polyvinyl acetate, methyl cellulose, and polyvinyl alcohol, and the raw materials of silica sand No. 4, silica sand No. 5, kansuite, zeolite, and kaolin clay. 55 to 75 (by weight) parts of B formulation and 45 to 75 parts (by weight) of B formulation.
Mix 25 (by weight) parts homogeneously in a dry powder mixer to make a blended powder product, and separately add Sj02Sol.
, Yama203Sol and Si02Li20Sol. Water is added to the mixture of each raw material to make a silicate sol with the amount of water 15 times that of the sol. This is mixed and mixed with the powder product and troweled onto the surface of the foamed lightweight concrete. A surface finishing method for foamed lightweight concrete is characterized by:

Next, the blending ratio of raw materials for the surface finishing material of the present invention will be explained in detail.

First, the blended raw materials are divided into four types: large particles, medium particles, small particles, and powder, and the particle size is blended according to the A formulation in Table 2 and the B formulation in Table 3, and 55 to 75 parts (by weight) of the A formulation and the B formulation. 45
The blended powder is blended within the range of ~25 (weight) parts and mixed homogeneously using a dry powder mixer to form a powder product as a surface finishing material and stored in a paper bag or the like. No.
2 Table A formulation 3rd Table B formulation In order to use this powder product to finish the surface of ALC board, separately Si02Sol, AI203Sol, Si0
Add water to a mixture of 2Li20Sol in a ratio of 1:1:0.3 to make an aqueous solution with the amount of water equal to the sound of one stitch of sol, and use this aqueous solution (hereinafter referred to as silicate sol aqueous solution) to prepare the powder product. Mix and knead the mixture and apply it to the surface of the ALC board with a trowel.

- Next, an example will be described in which the surface finishing material of the present invention is used to finish the surface of an ALC board.

Example 1 To 10 pieces of white Bortland cement, 1.5 parts of Movinyl (polyvinyl acetate), 0.55 parts of Tyrose (methyl cellulose), and 0.6 parts of Semenol (polyvinyl alcohol) were added. As a compound,
Lotus sand No. 5 3 anchors, Silica sand No. 4 1 anchor, Kansui stone powder 2 anchors, Zinclide (zeolite) 2. 1.5 parts of Orin clay was used as B formulation.

Blend A and B blend are mixed in a ratio of 30:70 and dry-mixed homogeneously. 2 parts of 1-seal silicic acid sol aqueous solution is added to this, and the mixture is well kneaded so that the flow value becomes 160-120.
After removing dust and dirt from the surface of the ALC board, sprinkle a small amount of moisture and trowel the plaster to a thickness of 5 feet with a plastering trowel. After another 5 hours, moisten the brush with water and finish the surface with a left-hand trowel while lightly stroking the previously troweled surface. The surface hardened within two feeding hours after application, resulting in smooth skin and a beautiful wind-white wall surface. Example 2 10 anchor parts of white Voltland cement, 2 parts of Movinyl, 0.5 parts of Tyrose, and 0.5 parts of Semenol were used as raw materials A, silica sand No. 5 2 foundation parts, silica sand No. 4 2 anchor parts, cold water 2 parts of stone powder, 2.5 parts of Sickleite, 2 parts of kaolin clay
．． 5 parts were used as B blended raw material.

Blend A and B blend were blended at a ratio of 35:65 and mixed for 40 minutes using a dry rotary powder mixer. To the thus homogeneously mixed mixture, two volumes of a 13-tone aqueous solution of a sol having a specified composition were added and kneaded. After thoroughly removing dust from the surface of the ALC board, a small amount of water was sprinkled on the surface of the ALC board, and a plastering trowel was applied to a 5-thick piece of willow, followed by natural curing for two hours. After 2 hours, a blended cement 2 for pressure application (trade name: K-Tack) was applied to the troweled surface to a thickness of 3 cm, and a score was made, and the porcelain tile 1 was pasted.

The cross-section of the adhesive at this time is shown in the drawing. In the above examples, the tensile strength of the surface finish was approximately 8k9/min.

In addition, 3 in the figure shows the boundary reaction phase of the material 4 of the present invention with the ALC substrate. When applied using the surface finishing material of the present invention, the addition of the easily reactive viscosity and silicate sol promotes the hydration reaction at the interface between the ALC and the material of the present invention, creating a reactive intermediate layer. Since the adhesive strength increases, the finished surface follows the expansion and contraction of the ALC board due to temperature and humidity, and there is no risk of cracks, cracks, etc. occurring. ALC
The hydrated minerals produced in the reaction phase between the plate and the surface finishing material of this invention include Ca○, Si02, N203, Ni20, cement hydrated minerals of the type, as well as Li02, K20, Na2.
It is presumed to be a phase of a mixed crystal group of hydrated minerals consisting of characteristic components of the blended raw materials such as 0, Mg○, Ti02, Fe203, and S04. Furthermore, physical properties such as viscosity and strength exhibited by two to three types of organic synthetic resins are considered to play an important role and have a favorable influence on the physical properties of the finished surface. Table 4 shows the properties of the surface finishing material of this invention during construction, and Table 5 shows the physical properties after construction.

Table 4 Properties Table 5 Also, the chemical properties after curing are alkali resistance: No abnormality after 30 days of soaking in a 1% solution of Sodium Sodium.

Acid resistance: Slight corrosion is observed after immersion in a 1% sulfuric acid solution for 30 days.

[Brief explanation of the drawing]

The drawing is a cross section of an ALC board applied with the surface finish of the present invention and surfaced paper tiles pasted on it.

Claims (1)

[Claims] 1. For portland cement, polyvinyl acetate,
A mixture containing raw materials of methyl cellulose and polyvinyl alcohol, silica sand No. 4, silica sand No. 5, kansui stone,
A mixture of 55 to 75 parts (by weight) of a mixture A and 45 parts of a mixture B consisting of raw materials of zeolite and kaolin clay.
~25 (by weight) parts were mixed homogeneously using a dry powder mixer to make a blended powder product, and separately SiO_2S
ol, Al_2O_3Sol and SiO_2Li_2O
Sol is characterized by adding water to a mixture of each raw material to make a silicate sol with a water content 15 times that of the sol, mixing and kneading this with the powder product, and applying it to the surface of the lightweight foamed concrete with a trowel. Surface finishing method for foamed lightweight concrete.