SU1375620A1 - Raw mixture for making expanded clay aggregate-concrete - Google Patents

Abstract

The invention relates to the production of building materials. The aim of the invention is to increase the mobility of the mixture and reduce the ultimate shear stresses. Raw mix for the manufacture of expanded clay concrete contains, May. %: cement 18.5-19.1; expanded clay gravel 21.3-22.1; expanded clay sand 16.5-18.1; quartz sand 16.5-18; an aqueous solution of an air-entraining additive is the rest .. The resulting material has a mobility of 22.1-23.5; shear stress of 0.23–0.36 g / cm, compressive strength of 5.2–5.7 MPa and bulk density of 1030–1096 kg / m. 2 tab. i (L

Description

WITH

cl

Od

The invention relates to the production of building materials, in particular, compositions of porous ceramite concrete mixtures that can be used in the molding of enclosing structures by the method of injection.

The purpose of the invention is to increase the mobility of the mixture and reduce the ultimate shear stresses.

Raw mixture contains components in the following ratio, wt.%:

Cement

Claydite

gravel

Clay sand

Quartz sand

Aqueous solution of air entraining agent

18.5-19.1 21.3-22.1 21.6-23.9 16.5-18.1

The composition of the proposed mixture are given in table. one .

(A mixture is prepared as follows.

Expanded clay gravel, expanded clay sand, quartz sand is mixed for 20-30 s to obtain a homogeneous mass. An aqueous solution of the air-entraining agent is gradually added to the resulting mass, while simultaneously mixing all the components of the mixture for 4-5 minutes. The resulting porous mixture is incubated for 15 minutes, then its mobility is determined by the draft of the standard mixture.

displacement and shear stress on a rotational viscometer. Control samples are formed from the obtained raw mixture with a laboratory supercharger ..

Comparative characteristics of the proposed and known raw material mixtures are given in table. 2

As shown by comparative tests, an increase in the mobility of the clay-concrete mix is achieved without reducing the strength and frost resistance.

F o rm u l a i b o te n i

Raw mix for making claydite-concrete, including cement, expanded clay gravel, expanded clay sand and a water solution of air-entraining additive, which, in order to increase the mobility of the mixture and reduce the ultimate shear stress, it contains quartz sand with the following ratio of components, .%:

0

five

Cement

Expanded clay gravel

Clay sand

Quartz sand

Aqueous solution of air entraining additive

18.5-19.1 21.3-22.1 21.6-23.9 16.5-18.1

Rest

Cement

Expanded clay fraction 5-20 mm

Expanded clay sand

Quartz sand

18.5 (225) 18.8 (235) 19.1 (245) 19.1 (215)

21.3 (258) 21.7 (271) 22.1 (284) 41.8 (470)

23.9 (290) 22.6 (284) 21.6 (277) 20.4 (230)

16.5 (200) 17.3 (216) 18.1 (232)

Continuation of table 1

Cohonents Content of components, wt.X (kg), as a part of a mixture

ProposedFamous

IIIZI

Water19.77 (240) 19.17 (242) 19.34 (245) 18.67 (210)

Air-entraining additive (START) (0.17% by weight of cement) 0.03 (0.383) 0.03 (0.399) 0.03 (0.416) 0.03 (0.366)

Table 2

Composition Mobility-Limit-LimitVolume of raw material capacity is better strength of a mixture of sediment strength of concrete — a standard-shear, zitoba-dried co-g / cm tone of a sous, compression,

MPa kg / m

Famous 9.2 0.81 5.1 962

Proposed

123.5 0.23 5.3 1030

222.7 0.29 5.7

322.1 0.36 5.2 5096.

Compiled by O. Motorina Editor N. Gunko Tehred I. Popovich Corrector L. Pilipenko

Order 733/24 Circulation 594 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

Claim Raw mix for the manufacture of expanded clay concrete, including cement, 20 expanded clay gravel, expanded clay sand and an aqueous solution of air-entraining additives, characterized in that, in order to increase the mobility of the mixture and reduce the limiting 25 shear stresses, it additionally contains quartz sand with slerase. Expanded clay gravel, expanded clay sand, silica sand is mixed for 20-30 s to obtain a homogeneous mass. An aqueous solution of an air-entraining additive is gradually added to the resulting mass, while mixing all components of the mixture for 4-5 minutes. The resulting polarized mixture was incubated for 15 minutes, then its mobility was determined by the sediment of the standard coding ratio of the components, wt.%: Cement Expanded clay gravel Expanded clay Quartz sand Aqueous solution of air-entraining additives 18.5-19.1 21.3-22.1 21.6- 23.9 16.5-18.1 Rest T a blitz! Components The content of components, wt.% (Kg), in the composition of the mixture Proposed Famous 1 2 | 3 Cement 18.5 (225) 18.8 (235) 19.1 (245) 19.1 (215) Expanded clay 5 to 20 mm 21.3 (258) 21.7 (271) 22.1 (284) 41, 8 (470) Expanded clay sand comrade 23.9 (290) 22.6 (284) 21.6 (277) 20.4 (230) Quartz sand 16.5 (200) 17.3 (216) 18.1 (232) - Continuation of table 1 -------------------- Components The content of components, wt.% (Kg), in the composition of the mixture Proposed Famous , | 2 | s Water 19.77 (240) 19.17 (242) 19.34 (245) 18.67 (210) Air entraining additive (START) (0.17% by weight of cement) 0.03 (0.383) 0.03 (0.399) 0.03 (0.416) 0.03 (0.366) Table 2 The composition of the raw mix Sediment mobility of a standard cone, cm The ultimate shear stress, g / cm ² The compressive strength of expanded clay concrete, MPa The bulk density of concrete in the dried state, kg / m ³ Famous 9.2 0.81 5.1 962 Proposed 1 23.5 0.23 5.3 1030 2 22.7 0.29 5.7 10b5 3 22.1 0.36 5’2 1096.