SU1071599A1 - Lightweight ash gravel - Google Patents

Abstract

LIGHT TREE GRAVIA, containing a core of a mixture of expanded perlite sand, TPA ash and mineral binder, and a shell made of a mixture of TPP ash and mineral binder, framed by the fact that, in order to increase strength, the components of the core are taken in the following ratio, wt. .%: Expanded perlite sand 30-60 Ash TES16-60 Mineral in the subsidence 10-28 and the components of the shell following, wt.%: Ash TES40-85 Mineral in the esche 15-60

Description

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The invention relates to building materials and can be used in the manufacture of artificial porous fillers based on ashes of thermal power plants (TPP).

A lightweight aggregate is known, consisting of a core and a shell; the core is made of a mixture comprising expanded fine material, for example, perlite sand and clay, with the following component ratio,%,%:

Expanded perlite sand80-86

Clay14-20

and the shell is made of a mixture including ash TPP and powdered clay, in the following ratio of components, May.%:

Ash TES60-80

Clay20-40

A method for the manufacture of this lightweight aggregate consists in preparing the raw mix, its granulation and high-temperature thermofibling: granule II.

The closest in technical capability and the effect achieved. the invention is light ash gravel consisting of a core and a shell, the core being made of a mixture comprising expanded perlite sand, TPP ash and cement, and the shell is made of a mixture comprising TPP ash, cement and nitrite -, nitrate - calcium chloride The famous gravel has the following indices: with a bulk bulk density of 520 kg / m, the strength is 1.53 MPa, and with a bulk mass of 500 kg / m, the strength is 1.8 MPa. Crtoco6 The manufacture of light ash gravel includes the preparation of the raw mix, granulation of the core and shell, and heat treatment at 90-95 ° C. „

A disadvantage of the known lightweight aggregates is their low strength.

The purpose of the invention is to increase the strength,

Specified; The goal is achieved by ITO. in light ash gravel containing a core of a mixture of expanded perlite sand, thermal power plant ash and mineral-binder and a shell from a mixture of thermal power plant and mineral binder, the core components are taken in the following ratio, wt,%:. Expanded perlite sand 30-60

Ash TES16-60

Mineral to the subsistence of 10-28 and the components of the shell in the following -. head, wt.%;

Ash TES40-85

Mineral Subsidy 15-60 As a mineral substitute, a gr-cement, a gypsum-cement-pozzolanic agent and a known content of cement and TPP ash in mixtures for forming core and shell can be used in the following ratio, wt.%:

Cement15-25

AshesTES75 -85

Steaming at 85-90 ° C is used as heat treatment.

For gypsum-cement-pozzolanic vazhuya him (GPCV), its content and ash TPP In mixtures for the manufacture of core and shell are in the following ratio, wt.%:

GCPV40-60

Ash TES40-60

Drying at 60-65 ° C is used as heat treatment.

For lime, the ratio of its content and TPP ash in mixtures for the manufacture of core and shell is as follows, wt.%:

Lime15-30

Ash TES70-85

B. Autoclave treatment at 130-135 ° C is used as a heat treatment.

The use of a light component in a mixture for kernels of granules in an amount less than the lower limit makes gravel not light enough, and in a quantity larger than the upper limit, it affects the granulation of the nuclei negatively.

The use of a mineral in a binder in an amount less than the lower limit does not allow the required strength of the gravel to be reached, and in a quantity greater than the upper limit, it is not economically feasible.

The light component used in the mixture should have a bulk bulk density of not more than 150 kg / m. The TPP ash used in the mixture should have a specific surface of at least 3000 cm-coal, and the content of residual carbon in it should not exceed 25 %

Example 1. Expanded perlite sand is mixed with thoroughly mixed pre-ground ashes of thermal power plants and Portland cements in the following ratio of components, wt.%:

H 60 3D 10

one

30 60 10

45 44 11

and moistened to 100-120% by weight of dry mix. From this mixture, pellets of 5–15 mm in size are rolled onto a plate granulator. Then, the obtained granules are doused on another granulator with a mixture of EOLY TES and cement to achieve an external layer 2-3 mm thick with the following ratio of mixture components, wt,%: G -, / PG Zola TES85 80 75 Cement 15 .20 25 After that, the granules are steamed ,, at 85–90 ° C. Para m a r 2. The expanded perlite sand is mixed with thoroughly mixed previously ground ashes of TPPs and GCPVs in the following ratio of components, wt%, J 77 17 Peritite sand SO. 60 Ash TPP 42 27.5 16 GCPV28 27.5 24 and moistened to 100-120% by weight of the dry mixture. From this mixture, pellets of 5–15 mm in size are rolled onto a plate granulator. Then, the obtained granules are doused with a mixture of ash from thermal power plants and GCPWs until a shell thickness of 2-3 mm is reached with the following ratio of mixture components, wt%: Ash TPP60 50 40 GCPV 50 50 60 After that, the granules are dried at 60-65 C. / Example 3. Expanded perlite sand is mixed with thoroughly mixed pre-ground ash TPP and lime in the following ratio KONmoHeHToB, wt%: 1 T Perlitic sand 30 45 Ash TPP60 44 Lime 10 11 and moistened to 100-120% by weight of the dry mixture. From this mixture, pellets of 5–15 mm in size are rolled onto a plate granulator. Then, the obtained granules are doused with a mixture of TPP ash and lime to obtain a shell with a thickness of 2-3 mm in the following ratio of mixture components, wt.%: TPP Ash Lime After this, the granules are subjected to autoclave treatment at 130-135 ° C. the gravel produced in the examples from the method of mixtures of nine compositions according to the examples. As can be seen from the table, light ash gravel made from the mixtures according to the examples has a high strength, allowing it to be used as a filling, bodies for lightweight structurally-insulating concrete.

550 545 450 580 535 450

2.5 2.0 1.7 2.6 2.2 1.8

570 520 450 2.1 1.8 1.5

. .. ".-.". "1" - m - m ", -.

Claims (1)

EASY ASH GRAVEL, containing) a core from a mixture of expanded perlite sand, TPP ash and mineral binder and a shell from a mixture of TPP ash and mineral binder, which, in order to increase strength, the core components are taken in the following ratio, wt.%: Expanded perlite sand 30-60 Ash TES16-60 Mineral binder 10-28 and the components of the shell in the following, wt.%: Ash TPP 40-85 Mineral binder 15-60 ί