SU698949A1 - Raw mixture for producing autoclave materials - Google Patents

Description

0.8

6,6

3.3

6 7.0

16.7

2.2

g / cm3.05.

, cm / г94,5.

have the following

27.77 4.21

62.84 1.96 3.22. sieve sieve;

Example. After thorough mixing, the components of the mixture are moistened with 10% water (in excess of 1OO%).

NOY mixture is pressed products in the form of kyrO

Peach under pressure of 150-ZOO kg / cm, then the product is placed in an autoclave, where it is subjected to hydrothermal treatment at 9 atm according to the following technological mode 2h + 4h--2h.

Example. Take Yu kg of the mixture in the following ratio of components, wt.%:

Nepheline schlam75

Quartz sand20

Pyrite stubs5.

The components of the mixture, after thoroughly moving, moisten with 10% water (in excess of 10%). From the moistened mixture, articles in the form of a brick are pressed under a pressure of 300 kg / cm, then products. Placed in an autoclave, where it is subjected to hydrothermal treatment at 9 atm according to the following process conditions: 2 h + 4 h + 2 h. Within 2 hours, the pressure in the autoclave is raised to 9 atm, after which the product is kept under such pressure for 4 hours at 185 ° C. Then within 2 hours the pressure in the autoclave is reduced to atmospheric. The finished product is tested for mechanical strength and water absorption.

Compressive strength according to GOST 8462 75 - 780 kg / cm, water absorption according to GOST 7O25-67 - 15%,

Examples of the composition of raw mixtures and their properties are shown in the table.

12

8О

The products are tested for mechanical strength (GOST 8462-75) and water absorption (GOST 7025-67).

The use of the proposed raw meal for the production of autoclaved products has the following advantages, providing a significant economic effect:

the physicomechanical properties of finished products are improved due to the selection of optimal concentrations of nepheline sludge, quartz sand, pyritic cinder and optimized technological

15

750

mode, thanks to which increases the strength of products from 5OO to 78O kg / cm; . the duration of the hydrothermal treatment mode is reduced from 12 to 8 hours.

Claims (2)

Invention Formula The raw material mixture for the manufacture of autoclaved materials, including nepheline sludge and quartz POCCO, is different from the fact that, in order to increase the strength, coorme ss 56989496 No hydrothermal treatment, she dopol-1. Kuninets BM and others. The use of it contains pyritic butts of powdered rotary kilns to improve the following ratio of components, the quality of silicate products. - Vestgaps wt.%; Lviv Polytechnic Institute, Nepheline slime 70-80 s1968, No. 30, p. 104-106. Quartz sand 12-27 2. Bozhenov, P.I., and others. Cements of auto-crusted butts 3-8. Main hardening and products based on them Sources of information, ve, Gosstroyizdat, 1963, p. 98 (protoporny in attention during the examination of the type) ,.