SU783317A1 - Composition for small-scale models of concrete structures - Google Patents

Description

one

The invention relates to the rubber industry, in particular, to the development of a composition for small-scale models of concrete structures and can be used to study their behavior in the 1pps condition.

The known composition for small-scale concrete sooebeney structures based on snloxane rubber, including ethyl alcohol, catalyst — tin sestate (K23O-19) and a filler (ethyl cellulose powder), for example, in a ratio of 50: 5: 0.6: 44.4 1D.

The known composition has the necessary low logical values of the decrement of vibrations, however, it has low viability and has a narrow range of elastic moduli of materials on it.

The purpose of the invention is to increase the viability of the known composition and the expansion of the MoafneA range of elasticity of materials based on it when scoring the NI of low values of the digestion curve.

This goal is achieved by the fact that the composition for small-scale models of concrete structures based on siloxane rubber, including ethyl silicate, a catalyst — tin octoate and a filler, contains glass microspheres as a filler; and additionally furfural in the following ratio of compounds, wt.%:

Siloxane rubber 43,1-84,7 Ethyl silicate 3,6-8,6

Catalyst O, 5-0,9

Glass microspheres 8.5-46.5

fs Furfural 0.3-4.3

Example. The model material is obtained with constant mixing in the following sequence. The siloxane rubber (mark CTNT) is first mixed with this leu li atom, then furfural is introduced and, after tbm lamixing, the catalyst and glass microspheres are introduced. The resulting mixture is poured into molds, which are dismantled in a day. The stabilization properties of hardened compound are achieved after the samples are kept at room temperature for 15 days. The table lists examples of the composition and properties of model materials. As can be seen from the table, depending on the ratio of the components, model material can be obtained, with modulus of elasticity (E) from 2.2 to 28 O MPa with values of the logarithmic decrement of vibrations7 17 Poisson's ratio () 0,13-0,20. This makes it possible to use the Sicloxane composition for the manufacture of models of complex and demanding structures, such as the foundations of powerful low-speed turbine units built of concrete, which have a low value, a logarithmic decrement of vibrations, and obtain reliable results on the detection of low-frequency resonances that are unacceptable during their operation.

Octoate of tin (K-230-19)

0.9

Glass data

8.5 microspheres /

Glass data

21.7 microspheres

Prototype

21.3

btb 4.7 1.8 0.5

46.5

Glass data

4h; 1 microspheres

2.2

0.15

Q13

to 0.4

up to 0.3

1,2-13

0.21

0.13

Claims (1)

43.6 578 Claims of the Invention Composition for small-scale models of concrete structures based on zipoxane rubber, including ethyl ethyl acetate, tin octoate catalyst and filler, characterized in that the chain increases the vitality of the soil and extends the range of elastic moduli of materials based on it while maintaining low values of the logarithmic decrement of vibrations, the composition contains glass micro 176 spheres as a filler and, additionally, furfroop in the following ratio of components, wt.%: Syloxane cat Chuk 43,1-84,7 Ethyl silicate 3.6-86 Catalyst 0.5-0.9 Glass microspheres8.5-46.5 Furfural Q3-4.3 Information sources taken into account during the examination 1. Application No. 2486004/23 -05, C (class C 08 L 83/04, May 17, 1997, according to which a decision was made to issue 1y copyright certificate (prototype).