SU1399286A1 - Mortar composition - Google Patents

Abstract

The invention relates to the field of building materials, to building solutions, and can be used for various types of masonry. The aim of the invention is to increase the strength of the solution. The mortar contains, in wt.%: Carbide lime-fluff 1.5-3.5; fly ash 4,5-7,5; electrostatic dust 3.5-5.8; sand 53.5-58.0; slag portland-cement 10.7-12.5; water the rest. Compressive strength of a solution of 10.2- 11.31 MPa. 1 tab.

Description

The invention relates to construction materials, in particular, to building mortars, and can be applied to various types of masonry and to interface with various surfaces — 1m: brick, stone for fixing the joints of large-panel and large-sized buildings.

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

1The goal is achieved by the fact that the mortar contains cement, sand, lime, water, additionally contains electrostatic dust, fly ash, as a cement - plakoportlandtsement, as lime - carbide lime.

The dust of electrostatic precipitators is a branch of the cement industry, has an orange-gray color, undergoes heat treatment at 700–1000 ° C, is the finest fraction in the production of cement clinker, leaves the upper end of the kiln and is caught by a suction pad. It has already formed in small quantities.

2CaO SiOj, 3 CaO-5 Al.jO ,, 2 CaO

and free oxides. Self-hardening, mechanical strength 12.0 18.0 Sha.

The chemical composition is as follows: 1%: SiO 21-72; CaO 57.46; SO, 3.23; A1, g.Oz 8.18; MgO 0.98; 4.97; Ti020.40; Silk rest.

The ash from the combustion of ecbasic coals is a fine fraction of 0.2 mm to 5 µm.

The chemical composition of ash, wt.%:, 32,56; CaO 0.42; , 3.86; TiOz 1.3; ZOZ 0.01; SiOj rest.

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ABOUT

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The mortar is prepared as follows. Diluting the required ingredient, mortar mixture: galakoportland cement, electrostatic precipitator dust, fly ash, carbide lime are processed to a specific surface area of 3200-4200, then the water is poured into the mixer, and the dry mixture is prepared in 2-3 minutes. The prepared mortar mixture was tested for plasticity, mobility, workability, and workability; a model was prepared for determining adhesion with elastic surfaces and adhesion; Samples were prepared - beams and cubes of sevens to establish mechanical strength.

The table shows the compositions of specific examples of the proposed mortar and their properties.

Claims (1)

Invention Formula Mortar, including carbide fluff lime, fly ash, electrostatic dust, sand and water, characterized in that, in order to increase strength, it contains carbide fluff lime treated at 900 ° C, and additionally Slac Portland cement in the following ratio of components, wt.%: Carbide lime-fluff 1.5-3.5 Fly ash 4.5-7.5 Drink electro-filters 3.5-5.8 Sand 53.5-58.0 Slag Portland cement 10.7-12.5 Water Rest Example The content of ingredients, wt.% Slag Portland cement 10.7 Dust of electrostatic precipitators 3.8 Fly ash 4.5 Carbide lime (fluff) 3.5 Sand 58.0 Water 17.5 Properties and indicators Compressive strength, Sha, after 28 days of wet hardening 10.2-10.55 Flexural strength, MPa 4.5-4.6 Strength of adhesion of mortar to brick surface, MPa 4.86-5.2 Water resistance 23 Coefficient frost resistance 0.82 Density, kg / m 2036. Example Content of ingredients, May.% Slag Portland cement 11.5 Electrostatic Filters Dust 4.5 Fly ash 6.5 Carbide lime shonka) 2.0 Sand 56.5 Water 19.0 Slag Portland cement 12.5 Electrofilters dust 3.5 Fly ash 7.5 Carbide lime (fluff) 1.5 Sand 53.5 Water 21.5 Prototype Compiled by O. Motorin Editor M. Tovtin Tehred M. Khodanych Order 2638/26 Circulation 594 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Table continuation Properties and indicators Compressive strength, Sha, after 28 days of wet hardening 10.73-10.96 Flexural strength 4.7-4.9 Strength of adhesion of mortar to brick surface 5.4-5.8 Frost resistance 25 Frost resistance coefficient 0.86 Density, kg- / m 2001 Compressive strength, Sha, after 28 days of wet hardening 11, 18-11,31 Flexural strength, MPa 5.1-5.4 Strength of adhesion of the solution to the surface of the brick 6.3-6 , 6 Frost resistance 25 Frost resistance coefficient 0.88 Density, kg / m 1993 after 90 days of wet hardening of all 3 examples Compressive strength, MPa 11.9-12.6 Flexural strength, Sha 5.6-5.8 Strength of adhesion of mortar to brick surface, Sha 6.9-7.4 Compressive strength, MTa 1.2-1.8 Proofreader V. But ha Subscription