SU1539190A1 - Method of producing quick-slaked lime for preparing gas-concrete mix - Google Patents

Abstract

This invention relates to building materials and relates to a method for preparing quicklime lime for preparing a gas-concrete mix. The purpose of the invention is to increase the rate of slowing down of the lime slaking and to increase the strength of aerated concrete. The method includes grinding of lime with a moisture-containing component, as which waste gas-concrete raw material with a moisture content of 10–20% in an amount of 20–60% per 100% active CA + MGO is introduced. The quick slaking lime slaking time as a result of preparing it according to the invention is 9-15 minutes, the strength of aerated concrete using it is 3.1-3.9 MPa with an average density of 600 kg / m ³ . 1 tab.

Description

one

(21) 4165416 / 23-33

(22) 10/22/86

(46) 01.30.90. Bul № 4

(71) Design and Research Institute Ural Industrial Construction Project

(72) L. G. Borodavkina and S. N. Danilov

(53) 666.943 (088.8)

(56) Adylova D. et al. Regulation of the process of slaking lime with the help of additives. - Construction and architecture of Uzbekistan, 1978, K 5, p. 44-46.

USSR Author's Certificate No. 279400, cl. From 04 to 38/00.

(54) METHOD FOR PREPARING A QUICKLASTING LIME FOR PREPARING A GAS CONCRETE MIXTURE

(57) The invention relates to building materials and concerns a method for preparing quick-extinguishing lime for preparing a gas-concrete mix. The purpose of the invention is to increase the rate of slowing down of lime slaking and the strength of aerated concrete. The method includes grinding of lime with a moisture-containing component, which is used to introduce waste raw gas with a moisture content of 10–20% in an amount of 20–60% for 100% active CaO + MgO. Timing. The quick-damping quenching as a result of its preparation according to the invention is 9-15 minutes, the strength of aerated concrete with its use is 3.1-3.9 Sha with an average density of 600 kg / m3. 1 tab.

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This invention relates to building materials and relates to a method for preparing quicklime lime for preparing a gas-concrete mix.

The purpose of the invention is to increase the degree of delay in the slaking of lime and the strength of azazobeton.

When jointly grinding lime with waste of aerated raw material, including a hump, a part of lime is pre-stained, due to which the time of lime slaking in the gacho concrete mix is increased, the water demand of the mix decreases, and the homogeneity of aerated concrete increases.

Hydratirovashp ie particles in a perpetrator, located in the nozzle, in a gas-concrete mixture act as

crystal seed, increasing the number of crystallization centers, due to which the maturation time of aerated raw concrete is accelerated and its pre-autoclave exposure is reduced. As a result of a more complete hydration of the binder, the final strength of the material, ala, increases.

It was experimentally revealed that it is necessary to introduce waste in the amount of 20-60% to 100 / active CaO + + MgO. When MPRRS is introduced, 20% of the waste is not enough moisture to reduce the rate of slaking of high viscosity lime, as well as the insufficiently active component of the waste.

With the introduction of a clawstick of waste over 60%, significant

sd

with so

with

about

Aggregating the lime and increasing the slaking time is above the allowable limits.

Example. Aerated concrete mixture was prepared with a consumption of components per 1 m3 of concrete, kg: Portland cement MDOO 150, lime 100, acid ash ash 380, aluminum powder PAP-1 0.4, water 315. Previously in a ball mill quickly extinguishing lump lime was subjected to joint Grind with the addition of a moist crust. At the same time, the moisture of the crust and its consumption were varied. The sequence of loading materials into the gas concrete mixer was as follows: water and a silica component (ash) to the ground (cement, lime). After 3 minutes of stirring, an aqueous suspension of aluminum powder was fed into the mixer and the mixture was stirred for 2 minutes. The ready-mixed concrete mixture was poured into a mold in the size of cm and the samples were subjected to a heat-moisture treatment.

on the mode: 2h - rise in pressure A.Akimova’s editor Editor T. Lazorenko Tehred M. Khodich Corrector L. Patay

Order 191

Circulation 553

VCHISH1I State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 4/5, Moscow, Zh-35, Raushsk nab. 113035

0

five

neither up to 8 atm, 6 h - isothermal aging at 8 atm.

The table shows the properties obtained in the process of grinding lime and properties of aerated concrete, made with its use.

Compared with the prototype, the proposed method provides an increase in the degree of slowing down of the lime slaking time and an increase in the strength of aerated concrete.

Claims (1)

Formula of the invention. Method of preparation of quick-extinguishing. lime for the preparation of a gas-concrete mix, which includes grinding of lime with a moisture-containing component of the mixture, characterized in that, in order to increase the degree of slowing down the lime slaking and increase the strength of the gas concrete, waste gas of a raw concrete with a moisture content of 10-20% is introduced as a moisture-containing component 20-60% for 100% active CaO + MgO. I Subscription