SU1033474A1 - Raw mix for making light-weight concrete - Google Patents

Abstract

RAW MIXTURE FOR THE EQUIPMENT OF LIGHT CONCRETE, including casing, gHspu AND ADDITIVES, about the fact that, in order to reduce the bulk mass and increase strength, it contains as an addition of sodium abietate, casein glue and calcium, and additionally, HIMS, and HIH, and also HYPE, and also HYPE, and also HYPE, and HYPE, and also HYPE, CI and calcium HI, and also HYPE will add HYPE, sodium gum, casein glue and calcium. May %: Portland cement. 20-30 Abietat sodium O, 02-O, O4 Casein glue 0.03-0.08 Calcium chloride 0.5-1 Gypsum 10-20 Ash Others WITH

Description

00

with

four

i4

Ignación ognosigs to scrub raw materials for the production of pied concretes can be used in the building materials industry, for example, in the manufacture of wall panels for residential and commercial buildings.

The known raw material mixture for the preparation of porous lightweight fine concrete, including low-clinker slag to tinder, coal ash, slag aggregate, surface active agent, aluminum powder, alkaline additive and water L1 3

The disadvantage of it is a high bulk density and low strength. The closest in technical essence and the achieved result to the invention is the light fobton mixture 2 including May. %:

Fly ash15,0-30,0

Surface-active substance О, О9-ОД5 Aluminum powder 0,002-0,02 Caustic soda O, 1-O, 5 Slag filler ZO, O-65, O Cement Else. The disadvantage of it is a high bulk density and low strength.

The purpose of the invention is to reduce the bulk density and increase the strength of concrete, i

The goal is achieved by the fact that the raw mix for the manufacture of lightweight concrete, including ash Portland demenz and additives, contains as an additive sodium nitrate, casein glue and calcium chloride and additionally gypsum in the following ratio of components, may%: Portland cement 20-30

Abiecate sodium 0.02-0.04

Casein clay, OZ-0, O8

Calcium chloride 0.5-1

Gypsum 10-2O

Ash The Rest.

In the light-mix concrete ispozyuig fly ash from burning to coal at the CHP. It is characterized by a high capacity and high water demand, which makes it possible to prepare products with a reduced bulk weight up to 700 kg / m. Ash is an active additive additive. The ash content in the mixture above 70% leads to a decrease in the strength of the products, and below 50% leads to an overrun of the scarce in the living

Portpashchvmeng (GOST 10178-78) in the composition of the light-weight concrete mixture with the strength and pillars of the evening isoipy. Contained in a mixture of Portland cement below

20% leads to a sharp decrease in the strength of the lightweight concrete mixture, and over 30% leads to its overrun.

In this mixture, gypsum can be used in the form of its water modification, both semi-water (GOST 125-79) and two-water (GOST 4013-74). The gypsum is hard and plays the role of a light concrete hardening accelerator in the early stages . An increase in the gypsum content of more than 20% leads to its overspending, as well as to the possibility of the destruction of the structure due to 1 formation of ethringite, and below 1O% - to the slippage of the strength of its slow set in early cpoim.

As additives, the lightweight concrete mixture includes the air-entraining component of sodium abietta (SIV) (TU 81-05-75-74 ordinary casein glue (GOST 3056-74) and a calcium chloride accelerator (GOST 450-77).

The use of these three components in the indicated dosages and in combination with the remaining components of the mixture provides for a lowering of the bulk mass due to the formation of a finely porous structure, as a result of the use of SIV and new glue, an increase in strength due to the use of primarily saltsi — a hardening accelerator — and due to the use of CHE, which provides curing in the early periods of hardening and casaine adhesive, ensured curing in the subsequent periods of hardening.

The content of (Ebetat sodium (CHE) below 0.02% leads to a breakdown of the bulk mass of the mixture, and 0.04% leads to a sharp decrease in the strength of the light concrete mix. The content of casein glue O, OZ% leads to an increase in the bulk weight of the mixture, and above 0 , 08% - to a sharp decrease in strength in the early stages.

The peculiarity of the proposed light concrete mix is the possibility of replacing a long and expensive heat treatment process - steaming (heat-humidifying processing) by drying the products with waste of 0 t of industrial heat inserts 80 ° C, which allows to achieve energy savings.

The technology for making lightweight concrete is as follows.

Ashes, portland cement and gypsum after dosing are subjected to joint grinding in a vibrating mill. There are both dry and wet grinding of the mixture. In the process of grinding, homogenization of all occurs.

components. After pulling out of the mill, add the required amount to the mixture to the mixture, with iso water of the mixing with the distillations dissolved in it. The semi-dried mixture is molded; the product is dried 5.

. Example. To obtain light concrete, five mixtures of ingredients are prepared, two of which are foreign overseas within the limits of grapes. Grinding without additives is carried out in a laboratory vibratory mill for 10-12 minutes. Additives are added to the mixture that is discharged from the mixture along with water. The shaped concrete is dried at 80. The view samples will be tested according to standard methods. five

At the same time, the specimen is suspended.

Comparative results of the tests are presented in the table.

As can be seen from the table, having weighed down the weight of the light-weight concrete mix, it decreases from UOb 1O - 30%. however, the strength is increased by 2-1.1 times.

h

The economic affect of the introduction of the proposed mixture is 6 rubles.83xsh per 1 m. With an output of 1OO thousand lei per year, the dkomichie effect is 683 thousand rubles.

Claims (1)

RAW MIXTURE FOR THE PRODUCTION OF LIGHT CONCRETE, including portladsement, ashes and additives, is due to the fact that, in order to reduce bulk mass and increase strength, it contains sodium abietate, casein glue and calcium chloride and, optionally, gypsum) as an additive, the following ratio May. %: P orthlandpetement Sodium abietate Casein glue Calcium chloride ‘Gypsum Ash 20-30 0.02-0.04 0.03-0.08 0.5-1 1Q-20 The rest is S> f