SU1146293A1 - Raw mix for manufacturing silicate articles - Google Patents

Abstract

RAW MIXTURE FOR THE MANUFACTURE OF SILICATE PRODUCTS, including alkaline in quartz and quartz sand, characterized in that, in order to increase strength and whiteness, it contains sodium alkali and, additionally, zeolite in the following ratio of components, wt.%: Sodium aluminate 8.5-15 zeolite .0.5-2.5 quartz sand the rest (L

Description

", 1 The invention relates to the construction materials industry and can be used in the manufacture of silicate products. The known mixture for the manufacture of silicate iztselky, including, wt.%: Alkaline water 576 granulated slag 10-16, ferrovanadic slag 38-48 and sand 37 40 D. The closest to the invention to the technical essence and achievable result is the raw material mixture silicate products, including, May, anhydrous magnesium silicate 10-50, alkali metal silicate 4.8-30 and quartz sand - the rest {2}. The disadvantages of the known mixtures are low strength and insufficient whiteness,. The purpose of the invention is to increase the strength and whiteness. The goal is achieved by the fact that the raw material mixture for the manufacture of silicate products, including alkaline solid, quartz sand, contains sodium aluminate as an alkaline binder and, in addition, zeolite in the following ratio, wt. %: Sodium agaominate 8.5-15 Zeolite 0.5-2.5 Quartz sand Else The mixture uses quartz peso with a SiO content of at least 90% and a grain size unit of at least. Percentage Its content in the mixture is determined by the percentage of others. components and is optimal for achieving the desired concentration of silicate ion and complete binding of ni Alyumiate, which is a condition for obtaining the required strength of the brick. Sodium aluminate (TU 48-5-52-76) is used as an alkali, which is used in n) and the mixture is applied as an aqueous solution. When sodium aluminate is included in the amount of less than 8.5%, there is a decrease in the strength of silicate bricks due to the lack of accuracy of the newly formed neoplasms, and in an amount greater than 15%, it has a negative effect on the bending and water absorption of the material, as well as 3 Increased cost due to component overruns. Natural zeolite is used as an additive - minerals with corresponding SiOz, YagO wearing -4- and 1. Its inclusion in the mixture in a quantity less than 0.5 does not contribute to the intensification of structure formation processes and, accordingly, increases in strength, and in an amount greater than 2.5% leads to the fact that part of the zeolite does not participate in the processes of forming the structure of the cementing substance, but acts as an active filler, which, if it does not contribute to an increase in the physical and technical parameters of the brick, causes an increase in its cost / The need to use The combination of the proposed components in the mixture is explained by the ability to synthesize a durable artificial stone during the autoclave process, due to the fact that sodium aluminate creates an alkaline solution (5) in the raw liquid pore fluid, which contributes to a sharp increase in the solubility of sand. At the same time, the concentration of silicate ion SiCOHj in the solution reaches 0.4-0.5, which contributes to its active interaction with sodium aluminate with the formation of sodium hydroaluminosilicates, according to the structural and morphology similar to natural zeolites, which provide monolayer of unreacted sand particles into a solid artificial stone . Natural zeolite allows to intensify the process of structure formation and to increase the strength of the brick due to the fact that when it is milled, the active centers are exposed, acting as a substrate for zapaxial growth, hydroaluminosilicate tumors. At the same time, due to a decrease in the activation energy of the processes of synthesis of neoplasms, the cementitious substance increases and the basicity of SjO - 4 hydroaluminosilicates decreases, which increases the strength of the brick. Primer p. The raw mix is prepared as follows. 25-39% of the mass of sand is subjected to joint grinding with natural zeolite to a specific surface 2000-i5000 and then mixed with the rest.

A solution of sodium aluminate is prepared by dissolving the dry sodium aluminate in water heated to. This solution is fed into the mixer with sand and zeolite and the mixture is stirred for another 1-2 minutes. By pressing, the raw material is formed from the resulting mass at a specific pressure of 15–20 MPa, which is then subjected to autoclave treatment at (crush, 2–3 h. Depressurization).

The compositions of the mixtures and the results of the tests are shown in the table.

As can be seen from the table, the mixture of the proposed composition allows to increase the strength of a brick during compression by 1020% and, when bending by 15-51%, to reduce

cost by 20-33% and increase the whiteness, i.e. go from light steel to white color. 11U62934 part of the sand in the mixer for-; 10 MPa) to mode. 2 h rise 3-5 min. Simultaneously separate pressure, 5 hours isothermal

RechgavA weighty (, tsikyK)

Synthetic forsterite

Ka, 0 3.9 8tO | (in terms of NajO)

River sand (yellow)

8MY)

Deg Droth wood serpent pentnyt

to

thirty

30 60

b "

thirty

ten

Claims (1)

RAW MATERIAL MIXTURE FOR THE PRODUCTION OF SILICATE PRODUCTS, including alkaline binder and quartz sand, characterized in that, in order to increase strength and whiteness, it contains as an alkaline binder sodium aluminate and additionally zeolite in the following ratio, Sodium aluminate Zeolite Quartz sand ma.X: 8.5-15 0.5-2.5 Else I. 1146293 1