SU1315417A1 - Raw mixture for producing unburned ash gravel - Google Patents

Abstract

The invention relates to the production of building materials and can be used in the preparation of a porous aggregate from the ashes of thermal power plants, which is cured by heat and moisture treatment. The purpose of the invention is to reduce water absorption by not reducing the cost of gravity. The raw material mixture includes, in wt%: 61.66-80 teilelectrostany ash, 10-16 lime, 2-5 gypsum, 1-3 liquid glass, 6-14 sawdust, 0.04-0.12 stearin and 0.3- 0.88 waste mineral. The aggregate from the mixture has a bulk density of fractions of 5-10 mm 350-423 kg / m, fractions of 10-20 mm 325-415 kg / m, strength of fractions 5-10 mm L, 8-7, V,., Fractions 10-20 mm 6.4--7.1 MIA, RODRIO g, schite 12-14% and sesch: -the capacity, 0- 4.4 rubles / m. 1 tap; | . sh (l

Description

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The invention relates to the production of building materials and can be used to obtain a porous aggregate from the ashes of thermal power plants, which is cured during heat and moisture treatment.

The purpose of the invention is to reduce water absorption while reducing the cost of gravel.

The raw material mixture for the manufacture of unburned ash gravel includes, masd: ash tegshoelektrostanliy 61.66-80; lime 10-16; gypsum 2-5; liquid loam -3; 6-14 stearin 0.04-0.12; waste oil O, 3-0,86 „

For preparing the raw mix, ash is used with a specific surface area of 4200, which is characterized by the following chemical composition in terms of its oxide content.

%: By her

51.3; AljO, 18.8; FeO + Y e G CaO 3,12; MgO 1.28; SO 0.18; ppt

56. Sawdust used

fractions 0-2.5

mm

and spent mi

neral oil - engine oil, diesel or transformer oil.

The components of the mixture are thoroughly mixed and granulated on a plate granulator, irrigated with water at a ratio of 34-0.38. The obtained granules with a size of 5-40 mm are steamed at 100 C according to the mode No. / 3 + 5 + 3 h, dried at 105i5 C and dispersed into fractions 5-105 10-20 and 20-40 mm,

The composition of the mixture and the properties of unburned gravel represented in the table in comparison with the known composition

In comparison with the known composition, the proposed composition provides: -1a reduction in water absorption by ravi up to 12-14 against 19% and a decrease in its cost due to savings of definitive C1: auger, x components (excluding) foam glass and kalni nitrate) to 4.0- 4.4 vs 6.2 rub / m gravel,

The reduction of water diffusion in the case of low and moderate content of water-repellent additives is achieved with the combination of stearin and oil with liquid glass. As a result of the interaction of these additives with I nnpa i Kpyn

Sh

f5

thirty

154172

complex organic-mineral complexes are formed in limestone-ash in the ground, compacting the microstructure of the lime-ash stone and contributing to the formation of advantageous capillaries and pores, In P1 there is a low content of liquid glass in the mixture of stearin and oil (1-3% ) prio, 1it to increase the strength of the gypsum-lime-ash stone, an increase in the glass content above the specified optimum reduces the strength of the stone. Mineralization and hydrophobization of sawdust in the material structure also occurs, which reduces water absorption and positively reflects on the strength characteristics of the material. The combination of oil and stearin in the mixture allows more finely dispersed and evenly distributed stearin, having the highest hydrophobic effect. As a result of this combination of the components of the mixture and their quantitative ratio, the required physicomechanical characteristics of porous gravel with low density and its low water absorption are simultaneously achieved, and the cost of making gravel decreases,

Claims (1)

Invention Formula 20 2.5 Raw mix dp manufacturing 35 unburned ash gravel, including-; ash heat of thermal power plants, lime, gypsum, additives, about h and w so that, with a view to lowering The Scientific Research Institute of Water Absorption with a decrease in the cost of gravel, it contains as additives liquid glass, sawdust, stearin and waste mineral oil in the following ratio of components, wt.%: Ash of thermal power plants61, 66-80 Lime10-16 Gypsum2-5 Liquid glass1-3 Sawdust 6-14 Stearin 0.04-0.12 Exhausted mineral oil 0.3-0.88 The content of the components in the mixture, wt.%: Ash TPP lime gypsum liquid glass sawdust stearin waste mineral oil foam glass and calcium nitrate supplements Characteristics of the ash gr bulk density kg / m, by fraction Editor G. Rogulich Compiled by, samples Tehred M. Khodanych Order 2270/23 Circulation .587 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project A 71.32 13 3 2 ten 0.08 80 ten 2 one 6 0.12 86 eight 3 0.3 0.6 0.88 Corrector I. Muska