SU1013439A1 - Raw mix for making brick - Google Patents

Abstract

RAW MIXTURE FOR MAKING CONSTRUCTION BRICK, including a silica-containing component and clay, characterized in that, in order to reduce firing time and eliminate efflorescence on the surface of a brick, it contains as an silica-containing component; - lump and sodium fluoride in the following ratio of components, wt.%: Karakum sand with a specific surface 1800-2200 CMVr 74.85-84.88 Clay10-15 Silicate lump5-10 Sodium fluoride 0.1-0.15

Description

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with The invention relates to the sawing of building materials and can be used in the production of wall and facing baked bricks. The known raw material mixture for the manufacture of bricks, including loess loam and 3-4 wt.% Of coal Cl. The disadvantage of this raw mixture is the relatively low strength of bricks of 100-125 kg / cm and uneven surface color, which cannot be used as a facial. Closest to the offer is a raw material mixture for the manufacture of building bricks 2, which includes the following components, wt.%: Loess rock silica-containing component 9 5-86 Clay 7-10 Anortite-ferrite 7-15 The disadvantage of the known blender mixture is a long firing mode with cooling mode 48 hours and the presence of efflorescence on the surface of a brick. The aim of the invention is to reduce the firing time and eliminate efflorescence on the surface of a brick. This goal is achieved by the fact that the raw mix for the construction brick The silica-containing component and clay contains, as silica, the Karakum sand with a specific surface of 1800 2200 CMVr and, additionally, silicate lump and sodium fluoride with the following ratio of components, wt.%: Karakumsky sand with a specific surface of 1800-2200 cm2 / g 74.35-84, Clay10-15 Silicate block 5-10 Sodium-fluoride 0.1-0.1 Ceramic mass contains as the main component - Karakum sand with the addition of highly plastic clay as a binder, body use nor in the production of bricks. In order to improve the sintering process, a complex low-melting additive is also introduced into the mass. A mixture of silicate lump and NaF was used as a low-melting additive. The addition of such an additive accelerates the formation of the melt and the binding of the components of the sand. When testing the ceramic mass, the Karakum sand from the Ashgabat field was used as a sand component, the silicate-lump produced by the Ashkhabad glass factory, highly plastic clay from the Kalininsky field (near Ashkhabad), sodium fluoride-chemical reagent. The chemical composition of the initial components is given in the table. 1, and table 2 shows the content of water-soluble salts in the Karakum sand. Products made by the following technology. Karakum sand is ground to a specific surface of 1800-2200, and silicate-lump is crushed to a specific surface of 3000, after which they are mixed with the addition of clay and an aqueous solution of sodium fluoride. Samples of cylinders with a diameter and height of 50 mm are made from the prepared mixture with pressing pressure of 15.0 MPa. Drying of the samples was carried out in an electric drying cabinet for a day with the maximum drying temperature of 127 ° C. The samples are calcined in an electric muffle furnace with a charge for 4 hours at 1000 and 1050 ° C. The invention is illustrated by the specific examples given in Table. 3. The results of physical and mechanical tests are given in table. 4. As can be seen from the tab. 4 bricks have high indicators of strength, frost resistance, and the absence of efflorescence on the surface allows them to be used as a front brick. In addition, the use of the Karakum sand raw material mixture will expand the raw material base of the ceramic industry and preserve significant areas for cultural farming. .Proka Karakum sand of Ashgabat. gorodorozhi 4.71 7.29 2.49 10.49 Clay of the Kalininskoe deposit (near Auixabda) 61.39 16.18 4.82 3.38

72.72 0.62

Table 1

Indicators

Smlikatp th

0.38 26.30 module Content of basic oxides,%. SiOjrAljOjfFejoJ CaO 1 MgO FsO, GP.p. T Iodul increase the 1.25 1.86 7.8 .4.92 0.36. The number of plastics 1.73 1.65 8.77 in Sunem 2.08 and 58

sands

0,003 0,012 0,024-0,009

0.018 0.035 0.020 0.0090.024

0.045 0.007 0.020 0.0100.006

Karakum sand with a specific surface of 1800-2200 cm

Clay

Silicate block with a specific surface area of 3000

Sodium fluoride

 table 2

0,0030,051

0,0080,114

0,0080,096

Table 3

79.8579.8881.88. 84,88

10101010

101085

0,150,120,120,12 raw strength 6.8 7.37.0 after drying, MPa, 5 1.631.65 Bulk mass, g / cm Compressive strength 21.7 -22.724.7 after calcination MPa 19.6 18.716.9 Water absorption,% Firing temperature, C Temperature

59

Table 4

2i - 23 hours

7.87.5 7.16.6 1,671.67-1.621.65 25.924.9 20.711.3 1 $ are missing, 616.9 18.418.7 firing of all samples 1000 С

Claims (1)

RAW MIXTURE FOR THE PRODUCTION OF BUILDING BRICK, including a silica-containing component and clay, characterized in that, in order to reduce firing time and eliminate efflorescences on the brick surface, it contains Karakum sand with a specific surface of 1800-2200 cm ² / g and additionally silicate block and sodium fluoride in the following ratio of components, wt.%: Karakum sand with a specific surface of 1800-2200 cm ”/ g 74.85-84.88 Clay Silicate block Sodium Fluoride