JPS6013989B2 - Mortar-based vibration damping material using wind-crushed steelmaking slag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a steelmaking wind-pulverized slag which is applied to vibration and noise generating bodies or their propagation path forming bodies to reduce vibrations and noise generating sources and their surrounding vibrations and noise. The present invention relates to a damping material coated with .

The following are known as non-restrictive onion materials:

■ Highly viscous viscoelastic materials mixed with porous or flake-like fillers such as asbestos to increase the damping effect.

@ A sheet-like product made by mixing flakes or fine metal pieces into rubber-based resin, or by creating a layered structure to provide a vibration-damping effect.

■ A paint or sheet-like material that increases the vibration damping effect by mixing heavy, hard, and inhomogeneous fine particles into a viscoelastic resin.

However, each of the above bran control materials has many problems in improving the vibration damping effect, so @ epoxy resin, unsaturated polyester resin, phthalate alkyd resin, polyvinyl chloride resin, chlorinated rubber , chlorinated polyethylene resin, chlorinated polypropylene resin, etc., a particle size of 100 μm or more (preferably 100 μm to 5 μm)
00 French) is mixed with 6 string capacity% or more,
A damping material coated (adhered) using crushed wind slag was proposed (
(Refer to Hakama Seki Publication No. 55-110624).

This damping material can obtain a greater damping effect than the damping materials described in ■, @, and ■ above, but on the other hand, ■
The particle size must be adjusted (only about 30% of the air crushed slag with a particle size of 100 to 500 particles can be extracted before particle size adjustment), ■ Larger vibration damping effect cannot be obtained, ■ Material cost is high. ■Poor surface condition (slag sticks to hands when touched), ■Long time to mold (approximately 10
~14 days) There are problems as described in ■~■ above.

Therefore, this invention was made to eliminate the above problems, and contains cement and rubber latex.
Furthermore, the present invention is characterized in that it is a mortar-based damping material that uses crushed steelmaking slag that contains crushed steelmaking slag as a fine material.

As shown in Figure 1, the air-crushed steelmaking slag obtained by rapidly air-cooling the steelmaking molten slag almost satisfies the JASS5 particle size range as a pongee aggregate without particle size adjustment. The coarse grain ratio is 2.3 to 2.8). That is, in the figure, between a and the original is the 1st grade standard particle size range of JASS5, between 0 and b2 is the 0th grade particle size range of WASS5, c,
d shows an example of the particle size distribution of the steelmaking wind-pulverized slag. In the present invention, Table 1 shows an example of the physical properties when the steelmaking wind-pulverized slag is used as the pongee aggregate.

Table 1 Next, examples of the present invention will be described.

Ordinary Boltland cement, water, rubber, latex (physical properties shown in Table 2), and pulverized steelmaking slag were mixed as shown in Table 3 to prepare a coated vibration damping material of the present invention. Table 2 3 For the purpose of comparison, comparative damping materials 1, 2, 3, and 4 corresponding to ■, @■, and @ described above were created.

Then, as shown in Figure 2, the required number of steel 1
．． Each of these damping villages 2 is applied to a thickness of 2.4 cm on a substrate 1 with a thickness of 2 ribs, and the mechanical loss coefficient of each damping village is determined by applying the resonance method to each substrate 1. The vibration damping effects were compared.

The results are shown in Table 4. Table 4 Furthermore, FIG. 3 shows the mechanical loss coefficient of the vibration damping material of the present invention at each frequency at a temperature of 220.

From the above, it is clear that the vibration damping material of the present invention has a higher mechanical loss coefficient than Comparative Damping Materials 1 to 4, and therefore has an excellent vibration damping effect. In addition, a damping material made of a mixture of the above-mentioned rubber latex (for example, 0.1 part by weight) with ungraded steelmaking wind-pulverized slag (for example, 1.0 parts by weight) is applied to the substrate in the same manner as above. When the resonance method was applied, a good vibration damping effect was obtained. As explained above, in this invention, an extremely excellent vibration damping effect can be obtained,
In addition, (a) slag does not adhere even when touched by hand, (b) good adhesion to the substrate, (c) short molding curing time, (d) good durability as it is a cement-based material, and (e) good quality of the material. It has the following effects: it can significantly reduce costs, it can be coated easily, it can be used with any type of substrate, and it is highly versatile.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the particle size distribution of steelmaking wind-pulverized slag, Fig. 2 is a cross-sectional view of the substrate coated with the applied damping material, and Fig. 3 is the mechanical loss at each frequency of the applied damping material of the present invention. It is a figure showing a coefficient. 1... Board, 2... Damping material. Figure 2 Figure 3

Claims (1)

[Claims] 1. A mortar-based applied vibration damping material using pulverized steelmaking slag, which contains cement and rubber latex, and further contains pulverized steelmaking slag as a fine aggregate.