SU1227612A1 - Method of preparing concrete mix - Google Patents

Description

1o: n {1-1 body li for 0.5 min, into): an um; a mineral mixture was added; mix and mix for a) 5 min, then water with plasticizer was mixed into the mixture of dry composites - a common additive - sulfite-yeast bar.d to the resin is neutralized with air entrained, mixed and mixed for 2 MHil.

The invention relates to the building materials industry and can be used in road construction.

The purpose of the invention is to increase the strength of concrete.

An example. Portland cement 400 is used for the preparation of concrete mixtures; granite we are used as fine aggregate.

Sifted through a No. 5 sieve, in a caul. From the resulting mixtures, an mineral additive is prepared — bauxite — 4-4x16 racks according to sludge, blast furnace slag, fly ash. with GOST 3104--81.

Prepare the concrete mix by following the following: Test results are presented. The portlandiement is mixed with for- 15 in table. 1-3,

Table 1 Physico-mechanical properties of sandy

concrete with bauxite gilam

The composition of bauxite spam,%; CaO 22.5; SiO 856; 13.8; 30.6; T10 3.3; 7.7; hhn 10 38. Bauxite slimes are pre-milled in a laboratory Noah ball mill to a specific surface of 4500 cm / g,

X-j # Composition of bauxite sludge,%: Cao PZ; SiO 7.0; i3,5; , 44.5; Na, 0 2.6; sp l 5,7. Bauxite was used} m-1 of natural grain composition without preliminary grinding, the specific surface is 4500 cm / g.

1o: n {1-1 body li for 0.5 min, into): an um; a mineral mixture was added; mix and mix for a) 5 min, then water with plasticizer was mixed into the mixture of dry composites - a common additive - sulfite-yeast bar.d to the resin is neutralized with air entrained, mixed and mixed for 2 MHil.

table 2

Physical and mechanical properties of sand concrete by granulated slags

Note. Domain lshak have the following

chemical composition,%: CaO 34.57; SiO 33.25; 14, MgO 9, OA; MnO 0.95; FCjO,, 31; SO, 0.35; Tie ,, 4,40; lpp2,30. Blast furnace slag ground in a laboratory mill to a specific surface of 4500 cm / g.

Table 3

Physico-mechanical properties of sandy concrete with fly ash

tagging. Fly ash has the following chemical composition,%: CaO 37,12; Sic ,, 34,60; A1.05 9.93; 12.87; SOg, 20; (K,; 0 + On 0) 0.80; Hhri2,4. Fly ash is ground in a laboratory Iowa mill to a specific surface area of 4500 cm / g.

The test results showed that the method according to the invention provides an increase in compressive strength and flexural strength and cement savings of up to 40%

Claims (1)

METHOD FOR PREPARING A CONCRETE MIX, including mixing the portal: -; cement, · an active mineral additive, aggregate, and water with a plasticizing additive, which is due to the fact that. in order to increase the strength of concrete, Portland cement is first mixed with aggregate, then with an active mineral additive, and then water is introduced with a plasticizing additive. SU „„ 1227612