SU1294796A1 - Method for preparing porous concrete mix - Google Patents

Abstract

This invention relates to a technology for the production of building materials and can be used to make building envelopes. The purpose of the invention is the elimination of concrete strength. The method of preparation of a concrete mixture consists in the fact that the amount of lime sand in living, quartz sand, organic resin and water is preliminarily determined. The determination of the LMS is carried out according to the formula, 6-I2 ,, - AI “W = 0.408 AND + 11.87) x (0.545, 35), where D is the consumption of the additive of the SDO wt.%; And & Lime consumption in silicate concrete, wt.%; AI - the content of active CaO + MgO in lime, wt,%; Hj5, c is the content of lime in silicate, n in the suspension, wt.%; S is the specific surface of ground quartz sand in a treadmill,. 1 tab. fB (L U with O5

Description

The invention relates to the production technology of building materials and can be used for building envelope.

The purpose of the invention is the elimination of concrete strength.

Preventing the collapse of the strength of silicate concrete, porous air-entraining additive LMS, is achieved by the fact that the maximum allowable consumption of the additive is prescribed depending on the lime content in the composition of silicate per tartan, as well as on the specific surface of crushed silica sand in

D

.-C

(3.6I ,,, 408I, A „And

BULK

5 ", 87) x (0.545" 10 -0.35), where D is the consumption of the additive LMS, wt.%; SiPT lime in silicate concrete, wt.%; the content of active CaO + MgO in lime, wt.%; lime content in silicate in the solid, wt.%; the specific surface of th quartz sand in the living,

The consumption of the additive is determined according to the method of determining the optimal consumption of a porous additive for the mortar component of light silicate concretes. According to this method, solution samples of a given composition are made with different consumption of the additive, they autoclave them, they are tested, the strength – density relationship of the solution is constructed in a dry state, the consumption of the additive leading to a drop in strength is determined. The maximum allowable consumption of the additive is determined by the result, which precedes the drop in strength.

The essence of the invention lies in the fact that by maximizing the consumption of a penetrating additive LMS, reduce the density of the silicate concrete without loss of strength, and also prevent premature seizure of the silicate mixture when using limestone.

Example 1. For the manufacture of porous silicate concrete, silicate mortar is taken, containing 35% w / w lime in it and ground quartz sand with a specific surface of 2500 to 65 wt.%.

o

five

0

five

0

five

0

five

0

Content of active CaO + MgO in lime is 80%.

To obtain a silicate composition, wt.%:

Lime-hipelka 7,98

Quartz, ground

sand14.71

Quartz sand 63.15

Water, 13.95

determine the flow rate of the porous SDL additive; , 2 wt.%, That when the density of the mortar mixture of 1921 kg / m is 3.87 kg / m.

Example 2: For the manufacture of porous silicate concrete, composition S MZS L)

Lime Boiler 10.15 Ground quartz sand12.37

Quartz sand 62.60 Water14.75

take silicate as a slurry with a lime-content of 45 wt.% and ground quartz sand with a specific surface of 2500 55 wt.%. The content of active CaO + MgO is known. ti 80%.

The consumption of porous additive SDO is determined:, 11% by weight, which, at a density of the mortar mix of 2016 kg / m, is 2, O kg / m.

PRI me R 3. Make silicate concrete composition, wt.%:

Lime Boiler 12,34 Ground quartz sand 10.11

Quartz sand 62.37 Water15.15

Silicate pertaining contains, wt%: Lime 55; ground quartz sand with a specific surface of 2500 45 wt.%.

The flow rate of the PHC additive is 0.05% by weight, which, when the density of the mortar mixture is 2075 kg / m, is 106 kg / m.

The test results of porous claydite are presented in Table.

Claims (1)

Invention Formula The method of preparation of porous concrete mixture, which includes a preliminary determination of the amount of lime-sand in tent, quartz sand, wood saponified resin (LMS) and water, followed by mixing of the components, characterized in that the amount of resin wood saponified lead by the formula. (3, BI ,,., 408И + + 11.87) x (0.545.10 -0.35), where D is the consumption of the additive LMS, wt.%; Consumption of the LMS additive, wt.% With the lime-sand-in-the-lime-lime composition - ground sand (mol.%): 35-65 45 - 55 35 - 45 Strength of porous kerramzitosilicate-concrete, MPa, at the indicated consumption of the additive LMS with the composition of lime-sand (mol.%): 35-65 45 - 55 55-45 Reset the strength of claydite-silicate concrete,%, with the composition of lime in place - sand (mol.%): „ lig - lime consumption in silicate concrete, wt.%; And the content of active CaO + MgO in lime wt.%; - the content of lime in silicate in the gage, wt.%. S is the specific surface of ground quartz sand in the tread, cm / g.