SU1567556A1 - Method of preparing concrete mix - Google Patents

Abstract

The invention relates to the building materials industry, to methods for preparing concrete mixes and may find application in the embedment of joints, the construction of facades of buildings, premises, and storage of petroleum products with ceramic tiles. Aimed at increasing strength. The concrete mix is prepared by mixing into a binder, a filler, mixing water with the addition of an organic plasticizer, then the mixture is kept for a period of time corresponding to the first stage of structure formation, after which 5 to 15% of red mud by the weight of cement and 1 to 10% are added divinylstyrene latex by weight of cement with a styrene content of 65% and simultaneously affected by ultrasound. 1 tab.

Description

The invention relates to the building materials industry, to methods for preparing concrete mixes and may find application in sanding joints, building facades of buildings, premises, and storage of oil products with ceramic tiles.

The purpose of the invention is to increase the strength.

Example. A concrete mix of the composition, wt.%, Is prepared: 31.1 Portland cement M 400, 13.3 quartz ground with a specific surface according to PSC-4 - 3500 cm2 / g, 40.5 building sand (), 0.04 glycerin. The latter is dissolved previously in mixing water, which is taken in an amount of 10% by weight. After mixing the concrete mix and mixing in the mixer (the speed is not less than

100 rpm for 2,0 minutes, take a sample (sample) of the mixture and determine the duration of stage 1 of the process of structure formation (for a given composition of the mixture, 30 minutes) by resonance frequency of the sample, then at rest for 30 min, red sludge in the amount of 3, I wt.% and divinylstyrene latex SKS-65 GP in the amount of 1.6 wt.% are simultaneously introduced with further stirring for 4.0 min. SCS-65 GP latex 65 is a marketable product and is characterized by a high content of polar groups, which makes it highly reactive, increases the degree of hydrophilicity, its wetting angle at the polymer-air interface is 14.4, Cr g: l

i ate

0

sludge is a waste of alumina production, it is used in the form of powder of chemical composition, wt.%: oxen + ppt 9.25; SiO. 9.08; A140, 16.55; Fe20, 44.5; CaO 8.02; LiO + CrO 5.80; Ti02 5.75. The used red mud is characterized by high dispersion: particles with a radius of 3-5 microns contain about 80%.

The concrete mixture prepared as described is placed in forms 7.07 x 7.07 7.07 cm and subjected to heat and moisture treatment according to the 3 + 4 + 10 + 2 mode at an isothermal temperature of 365 ± 3 K and according to the mode: 293 ± 2 K and an ambient relative humidity of 65%. Parallel to this, the concrete mix is applied with a layer of 30 mm thick in a special formwork on the surface of the concrete cube (the grade of the concrete of the UZOO cube, 28 days old). the size of YuMO Yu. cm. Before applying a layer of prepared concrete mix, the corresponding surface of the concrete cube is machined with a metal brush. The obtained sample is subjected to heat and moisture treatment according to the described mode. Another of his series hardens under significant conditions, as concrete concrete cubes - at an ambient temperature of 293 ± 2 K and its relative humidity of 65%.

The processing of the concrete mixture using ultrasonic vibrations is carried out with the following parameters: ultrasonic oscillation frequency of 22 kHz, particle amplitude of 2.4 µm, processing time 4 min.

The test results are presented in the table.

Claims (1)

Invention Formula A method of preparing a concrete mix, which includes mixing into a binder, a filler and mixing water with the addition of an organic plasticizer, holding the mixture for a time corresponding to the duration of the first stage of structure formation and mechanical activation of the mixture, characterized in that, to increase strength, the concrete mix with mechanical activation, red mud is introduced in an amount of 5-15% by weight of cement and 1-10% by weight of cement of divinylstyrene latex with a styrene content of 65% and simultaneously affected by ultrasound. 3.9  2.2 2.8 3.5 44 4 7.7 6.2 7.9 s 4 6 13.7 2,278 "L 3.4 4.2 6.4 3 3.9 6 12 6,976 L S 7.3 7.7 6 8 hte 1.6 10 3.1 wt.% Latex SKS-65 GP, water up to 100% Preparation of concrete mixture composition, wt.%: 31.1 6 6Z8 8A6 10.1 8.7 Portland cement I1.6 Tz, 5 T3.9 T 74 TT Tz 137b T Tz M 400, 13.3 ground quartz, 40.5 sand construction, 0.04 glycerin; 5 54 66 98 55 67 77 81 114 79 3.1 wt.% Red- 62 69 82 779 69 72 80 93 725 87 sludge and 1, 6 wt.% Latex SKS-65 GP, water up to 100% Preparation of concrete mixture composition, wt.%: 31.1 portland cement K 400, 13.3 quartz ground, 39.5 building sand, 0.04 glycerin; at different moments I time from shutter nn entered 3 7 3A9 5.1 3A9 7 5J 4.7% by weight of red 6.8 7.7 7o 8.7 7.1 7.5 7.9 9.5 8.9 sludge and 0.31% by weight latex SKS-65 GP, 40 49 59 77 47 50 65 70 88 56 water up to 100% 5160 71 89 57 59 69 79 92 b7 Preparation of concrete mix composition, May. 7 .: 31.1 Portland cement M 400, 13.3 ground quartz, 38.1 building sand, 0.0 /, glycerol; in 2 2A4 3 different moments 279 3.7 4 5.9 374 33.2 464.0 time from the shutter entered 6.2 wt.% red sludge and 0.15 wt.% 37 45 53 65 47 43 48 55 70 54 latex SKS-65 GP, 45 54 63 85 64 47 50 70 97 65 water up to 100% Preparation of concrete mix composition, wt.%: 31.1 portland cement 1567556 go, 0.04 glycerol; 0.9 wt.X red mud and 4.7 wt.X latex SCS-65 GP, water up to 100% 8 Continuation of the table 45 62 39 46 51 53 57 69 69 88 55 67