SU925919A1 - Raw mixture for making heat- and sound insulating products - Google Patents

Description

The invention relates to the building materials industry and can be used for the manufacture of heat and sound insulation boards based on mineral wool.

The known raw material mixture for the manufacture of soundproof products, including D: mineral wool b575, mineral filler 5-10 and a binder based on starch 2-5, carboxy methylcellulose 2-5, bentonite 3-10, borax 0.5-0, 8, waste paper 10-20, paraffin 0.5-0.9, polyvinyl acetate emulsion 1-3 m

The disadvantages of this mixture are its high durability and the deficiency of the constituent products.

Also known is a heat insulating composition containing 5: granulated mineral wool and a binder based on starch 10,11, 3, kaolin 11.6-12, boric acid 0.5-0.6, paraffin 1.5-1 , 7 L2J.

The disadvantages of products of this composition are their reduced mechanical strength and, consequently, a large amount of waste during their production.

The purpose of the invention is to increase the strength and reduce the cost of products. .

The goal is achieved by the fact that the raw material mixture for the manufacture of heat and sound insulating products, including granulated mineral wool and a binder based on starch, kaolin, boric acid and paraffin, additionally contains waste products of sound insulating plates Akmigran in the following ratio of components, wt. %:

Granulated

mineral wool ZO-

Binder, total 21-33

Including:

starch8,6-9,

kaolin 10.8-11.8 3 boric acid 0.5 paraffin1.1-1.3 Waste from the production of Akmigran sound insulation boards (including dust). Partial replacement of granulated mineral wool (more than 50% of filament yarn) with production waste. The sound of insulation boards significantly reduces the cost of products and increases their strength due to the addition of starch binder in the raw material to the raw mixture. The process of preparing the raw mix is carried out as follows. Waste from the production of Akmigran sound insulating plates mixed with water in predetermined ratios, then mixed with granulated mineral wool and 94 binder, consisting of starch, kaolin, boric acid and paraffin, are pre-prepared into the mixture and mixed in a mixer until homogeneous molding compound. The relative humidity of the mass. From the resulting mass according to the technology adopted in practice, products are made. To obtain heat and sound insulating plates, raw mixtures were tested, the composition of which is given in Table 1. Characteristics of heat and sound insulating products obtained from the known and proposed raw mixtures are listed in Table. 2. Thus, the use of the proposed raw mix for the manufacture of heat and sound insulating products saves raw materials, increases mechanical strength and reduces the cost of the product.

Granulated mineral wool

Binding, total Including:

starch

kaolin

boric acid

g

paraffin

Waste production sound insulation plates Akmigran, (including dust)

kk 23

75 25

30 21

37

22

8.6

9.4

9.1

0.3

10.8

P, 8 11.2

2.7

0.5

0.5

0.5

1.1 1.2

1.3 33

9

Bulk weight, kg / m

Flexural strength, MPa

Hygroscopicity, wt .;

Sound absorption coefficient at 1000 Hz

Heat conductivity coefficient, W / mK

Claims (2)

1. USSR author's certificate 39838, cl. On B 43/02, 1969. 2. GOST 17918-72.