SU796214A1 - Light-weigh concrete mix - Google Patents

Description

The invention relates to the building materials industry and can be used in the manufacture of lightweight concrete based on granular phosphoric slag with hardening activators.

The composition of the heavy concrete mixture is known, in which, in order to reduce humidity and increase durability, finely ground phosphoric slag is used as a binder, and quartz sand £ G | .

Its disadvantage is low strength. fifteen

Closest to the proposed invention is the composition of a light-concrete mixture containing%, 20-31 fine-ground phosphoric slag, activated with lime} 42-52 coarse-20 porous aggregate fractions of 5-10 and 10-20 mm (expanded clay) and 22-33 sand from granular phosphorus slag £ 2 ^ | .

The disadvantage of this composition 25 light concrete mixture is the increased bulk density of concrete, as well as low strength.

The purpose of the invention is to increase strength and reduce bulk density. thirty

This goal is achieved in that the light-concrete mixture, including finely ground granular phosphorus slag, a hardening activator and expanded clay crushed stone fractions of 5-10 and 10-20 mm fractions, contains caustic sodium and additionally expanded clay sand in the following ratio of components, wt.%:

Fine granular, phosphorus slag 30-4 2

Sodium hydroxide

Expanded clay crushed stone of fraction 5-10 mm

Expanded clay sand fraction 5 mm

Expanded clay crushed stone of a fraction of 10-20 mm

This composition allows

0.8-1.2

10-20

2-5

Else completely eliminate Portland cement from light concrete mix, increase mechanical strength and reduce bulk density of concrete.

PRI me R 1. As the starting materials take granular phosphorus slag plant phosphoric salts, sodium hydroxide and expanded clay different 3

4.

fractions. The chemical composition of phosphorus slag is as follows: SiOq - 4 2/2 9;

2.71; Fe ^ Oj - 0.32; CaO - 45.0; MqC - 3.33; SOn, 0.70; Na _a 0 - 0.40; K ₂ 0 - 0.37; ΡιχΟς ^- 1.65; E is 2.4.

The specific surface is 3200 cm ^ / g. j Of these components were made of concrete mixtures of the following compositions, wt.%:

Finely ground gra1 and zero phosphate

shaped : slag 33.0 41.0 Tart sodium 1,0 1,2 Keramz um fractions 20-10 mm 2.0 17.0 10-5 mm 18.0 30.8 45 mm 46.0 10.0 Dry Components (phosphoric slag

kers.mzit) of concrete mix, mixing and hydrothermal treatment of concrete was given in Example 1. The compressive strength of concrete samples 10x10x10 cm is 122-171 kgf / cni after steaming, with a bulk density of concrete 1.017-1230 kg / m.

Thus, the proposed composition of lightweight concrete mixes up the cost of lightweight concrete products, increases mechanical strength and reduces bulk density of concrete. At the same time, you can get big savings due to the complete exclusion of Portland cement from the composition of light concrete mixes, as well as improve the quality of the resulting products.

Claims (2)

The invention relates to the building materials industry and can be used in the manufacture of lightweight concrete based on granulated phosphate slags with curing activators. The composition of a heavy concrete mix is known, in which fine ground phosphorus slag is used as a mortar and low-quartz sand 11 as a filler to reduce humidity and increase durability. The disadvantage of it is low strength. The closest to the proposed invention is the composition of a lightweight concrete mixture containing%, 20-31 fine ground phosphorous slag, activated with lime} 42-52 large porous aggregate of a fraction of 5-10 and 10-20 mm (expanded clay) and 22-33 sand from granulated phosphoric slag G2. The disadvantage of this composition of light concrete mix is the increased bulk weight of concrete, as well as low strength. The purpose of the invention is to increase the strength and decrease the bulk density. This goal is achieved by the fact that a light-weight mixture comprising finely ground granulated phosphorus slag, a hardening activator, and expanded clay crushed stone of fraction 5-10 and 10-20 mm contains caustic sodium and, additionally, expanded clay in the following ratio of components, wt.%: Fine ground granulated, phosphoric slag 30-42 Caustic sodium 0.8-1.2 Expanded clay crushed stone fraction 5-10 mm10-20 Expanded clay sand fraction 5 mm 2-5 Expanded clay cebalite fraction 10-20 mm Else Such composition allows you to completely eliminate l Portland cement from lightweight concrete mixture, to find mechanical strength and reduce the bulk weight of concrete. Example. Granular phosphoric slag of the phosphate salt plant, caustic sodium and expanded clay of various fractions are taken as starting materials. The chemical composition of the phosphorus slag is as follows: SiOj - 42/29; AE ,,, - 2,71; , - 0.32; CaO - 45.0 MqC - 3.33; SOn, - 0.70; - 0.40; - 0.37; 1.65; F- - 2.4. The specific surface area is 3200 cm / g. These components consisted of concrete mixes of the following composition, weight,%: Fine-grained granulated phosphoric slag 33.0 41.0 Corrosive sodium 1.0 1.2 Claydite of fraction 20-10 mm2, 0 17.0 10-5 mm18.0 30.8 / 5 mm. 46.0 10.0 The dry components (phosphoric slag and kerg.mzit) of the concrete mix are mixed for 3 minutes, and the caustic sodium is injected with the mixing water. The concrete mix is compacted in the forms by vibrating on a standard vibrating plate for 30 seconds. The resulting concrete is subjected to hydrothermal treatment in a steam chamber at 3x3x5 hours. The strength of samples 10x10x10 cm, made from these compositions, is 195218 kgf / cm, with a volume weight of concrete 1330-1360 kg / m P. As the source materials / use ground granulated phosphoric slag, caustic sodium (as in example 1) and expanded clay of various fractions. Of these components are concrete mixes of the following composition, wt.%: Fine-grained grain - 1 P III zero phosphate, 0 41.0 33, shaped slag 1.2 1.2 1, Caustic Sodium Claydite fraction 20-10 mm mm 43 , 3 5 MI.1 10.5 45.8 53, Concrete preparation, molding and hydrothermal treatment of concrete were given in Example 1. The compressive strength of concrete samples 10x10x10 cm is 122-171 kgf / cm after steaming, with a bulk weight concrete 1017-1230 kg / m. Thus, the proposed composition of lightweight concrete mixes reduces the cost of light concrete products, increases mechanical strength and reduces the bulk weight of concrete. In this case, it is possible to obtain large savings due to the complete elimination of Portland cement from the composition of the lightweight concrete mixture, as well as to improve the quality of the products. The invention is a lightweight concrete mixture comprising finely ground granulated phosphorus slag, a hardening activator and expanded clay crushed stone of a fraction of 5-10 and 10-20 mm, which is different from the fact that, in order to increase the strength and decrease the bulk density, it contains a caustic Sodium and additionally expanded clay sand in the following ratio of components, wt.%: Fine ground granulated phosphoric slag 30-42 Caustic sodium 0.8-1.2 Expanded clay crushed stone fraction 5-10 mm 10-20 Expanded clay sand fraction 5 mm 2-5 Expanded clay crushed stone p. 10-20 mm Eternal, Sources of information taken into account during the examination 1. USSR author's certificate No. 392038, cl. From 04 To 31/10, 1971. 2. Authors certificate of the USSR 444748, cl. From 04 To 15/02, 1969.