SU1609781A1 - Method of producing ash-concrete stone - Google Patents

Abstract

The invention can be used in the preparation of wall stones used for residential and industrial construction. The purpose of the invention is to reduce the consumption of cement and increase the strength of stones. The method consists in using a mixture of cement, lime and gypsum as a mortar in a ratio of from 1: 1: 0.2 to 1: 2: 0.4, while first the ash is treated with an additive of surfactant with water in an amount of at least 1 (2 parts required for kneading for 25-45 seconds, then lime, gypsum is added and mixed for 2-5 minutes, then mixed with cement and the remaining water for 25-45 seconds. The method allows to reduce the consumption of Portland cement by 2-3 times and to increase the strength of the stones immediately after they are molded (before heat treatment) by 1.7-3 times, thereby reducing the preliminary exposure to the SCR and the amount of scrap when packing the stones. 1 tab.

Description

(21) 4619846 / 23-33

(22) 12/14/88

(46) 11/30/90. Bul No. 44

(71) Moscow Engineering and Construction Institute. V.V. Kuibyshev

(72) A.V. Volzhensky, N.Yu. Danilovich and O.V. Vysotska

(53) 666.97.03 (088.8)

(56) USSR Author's Certificate No. 482414, cl. From 04 to 40/00, 1973.

Copyright certificate. USSR № 835985, cl. From 04 to 40/00, 1979.

(54) METHOD FOR PREPARING GOLD-CONCRETE STONES

(57) The invention can be used in the preparation of wall stones used for housing and

 industrial construction. The purpose of the invention is to reduce consumption

ment and increase the strength of stones. The method consists in the fact that a mixture of cement, lime and gypsum D is used as a mortar D ratio from 1: 1: 02 to 1: 2: 0.4, while first the ash is treated with an additive surfactant with water in an amount of at least 1 / 2 parts required for kneading for 25-45 seconds, then lime, gypsum is added and mixed for -2-5 minutes, then mixed with cement and the remaining water for 25-45 seconds. The method allows to reduce the consumption of Portland cement by 2-3 times and to increase the strength of the stones immediately after they are molded (before heat treatment) by 1.7-3 times, thereby reducing the preliminary exposure to the SCR and the amount of scrap when packing the stones. 1 tab.

The invention relates to the construction materials industry and can be used in the manufacture of wall stones used in residential and industrial construction.

The aim of the invention is to reduce the consumption of cement and increase the strength of stones.

The ashes are used from burning any solid fuel (with a .CaOgg content of not more than 5% by weight) of both dry selection and gm removal.

Processing components of the concrete mix for less than 25 seconds does not have the desired effect, and an increase in processing time of more than 45 seconds does not lead to an increase in ash activity at first.

In addition, a further increase in processing time leads to an excessive increase in the dispersion of the ash, which is accompanied by an increase in its water demand and may cause a decrease in the strength of the concrete. The treatment of i-jeecTH with gypsum for 2-5 minutes allows lime to be completely extinguished.

I and raise the temperature of the mixture to 50 - 60 ° C, which accelerates the process of increasing the structural strength of concrete.

The selected ratios of the components of the binder allow to obtain the required strength of the concrete while maximizing the allowable reduction of cement, ensuring the durability of the concrete. Ashes

with the addition of surfactant and water

Od

about with |

00

an amount of at least 1/2 of the required volume is loaded into the runners or another activator and mixed for 25-45 s.

The treatment of all the ash in runners or another activator makes it possible to homogenize and activate it, and the initial treatment of ash by the addition of surfactant leads to its adsorption directly on the surface of the particles, which have a strongly developed surface. This leads to a reduction in the water demand of the ash. Then quicklime and gypsum are loaded into the mixer and mixed for 2-5 minutes. Following the introduction of lime, it is more fully quenched, and the addition of gypsum allows you to regulate this process. The introduction of cement in the last turn does not complicate the process of slaking lime. The cement is then added to the remaining water and mixed further. The use of lime and gypsum allows you to change the kinetics of concrete formation by forming a colloid-crystallization structure with an additional number of tumors, which leads primarily to an increase in the raw strength of concrete and a reduction in the consumption of cement. curing before heat treatment without fear of internal stresses in the raw material exceeding its tensile strength.

Example Preparing stone samples of 390x190x188 mm in size with voids by the method of vibropressing with a loading value of 200 g per 1 cm for the subsequent determination of the strength characteristics.

Treatment of ash with water, water and an additive is carried out in runners of grade 1A-11M (volume 200 l).

Stones are tested immediately after vibropressing and 4 hours after HVO according to the regime of 24-3 + 6 hours at 85-90 ° С. .

In accordance with the known method, in runners, firstly, 1/3-2 / 3 of the required quantity for kneading is used.

about 5 0 5 Q

d

five

0

for 3-5 minutes, then the mixture is reloaded into the concrete mixer, the rest of the porous ash is introduced, and the mixing is continued for 1-2 minutes.

In accordance with the proposed method, all the ashes in the runners are processed together with the addition of surfactants and water in an amount of at least 1/2 of the amount required for the batch, mixed with lime and gypsum, then with cement and the remaining water.

The modes of the method, the consumption of components and the test results are shown in the table.

The following materials are used: the ash-and-slag mixture of the Stupinskaya CHPP-17 (TOST 25592-83) with a slag content of 2.5 mm to 10% by weight; Portland cement Resurrection plant M400; ground ground burnt lime with an activity of 75-80%; gypsum brand G4 (GOST 125-79); surface-active additive years (OST 13-183-83).

It follows from the results that the proposed method allows reducing the consumption of Portland cement by a factor of 2-3 and increasing the strength of the stone immediately after molding to 1.7 to 3 times (heat treatment), thereby reducing the preliminary shutter speed before SCR reject quantity when packing,

Claims (1)

Invention Formula The method of preparing ash concrete stones, including processing in the ash activator, sticking, water and surfactant, characterized in that, in order to reduce cement consumption and increase the strength of the stones, a mixture of cement, lime and gypsum is used as a sticking agent. from 1: 1: 0.2 to 1: 2: 0.4, at the same time, the ash is first treated with the addition of surfactant with water in an amount of at least 1/2 part, required for yames, for 25-45 seconds, then lime is added , gypsum and mixed, rolled for 2-5 minutes, then mixed with cement and the remaining of DPI within 25-45 with. -, moreover, the ratio of cement: lime: gypsum corresponds for example 1 to 1: 0.5: O. and 2 to 1: 1: 0.2; 3-1: 1.5: 0.32; 4 1: 2: 0.4; 5-1: 3: 0.5. Compiled by G.Tulsky Editor T.Lazorenko Tehred M.Khodanych Proofreader M.Kucher va Order 3704 Circulation 564 BNIIPI of the State Committee for Inventions and Discoveries attached to the State Scientific and Technical Committee of the USSR 113035, Moscow, Zh-35, 4/5 Raushsk nab. Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101 Subscription