SU863553A1 - Raw mixture making light weight concrete filler - Google Patents

Description

(54) RAW MIXTURES FOR THE MANUFACTURE OF CONCRETE LIGHT COMPLETE

one

The invention relates to the productivity of building materials, and to the method for producing porous aggregates used to prepare lightweight blocks.

There are masses for the preparation of porous aggregate from fly ash and various additives that improve the properties of a porous aggregate, for example, from scythe ash with the addition of red sludge fl to it. The technical essence of the proposed raw material is a raw material and a mixture, including, wt.%: fly ash 10-20, waste of copper production 3-4 and clay 76-87 f2J.

However, the resulting aggregate has a low resistance to spalling (2.56-2.83 kg / cm).

The purpose of the invention is to increase the mechanical strength.

The goal is achieved by the fact that the raw mix for making lightweight aggregate of concrete, including fly ash, foundry waste and binder, additionally contains waste coal, and as a bond - sulphite-alcohol bard in the following ratio of components, weight,%: /

Fly ash 82,96-88,94 Foundry production waste3-5

Coal waste is no 8-12

Sulfite-alcohol bard 0.04-0.06 The prepared homogeneous mixture is sprayed with a solution of sulfite-alcohol bards with a density of 1.06 in an amount of 27-37% by weight of the dry components at the time of granulation.

To prepare a homogeneous mixture of dry components, foundry waste and coal preparation waste are crushed and ground, then fly ash, foundry production and coal preparation waste are placed in the right proportions 20 for 20-30 minutes in a ball mill to obtain a homogeneous mixture and additional grinding. Specific surface area up to 5000 cm2 / kg; The prepared mixture is fed to a plate granulator (laboratory), moistened with a solution of PRS (SDB) with a density of 1.06 g / cm. The density of the granules is controlled by drying from a height of 1.5 m onto a concrete floor. Wet 30 dried granules at 105 ° C and placed in a pulping furnace for pre-stage calcination at a temperature that is instantaneously transferred to the heel temperature 1240c of a tube furnace, where they are sintered, fused and swell for 5-7 minutes.

The addition of waste coal, evenly distributed in the mass of the granule, is an intumescent component with a relatively small bulk mass, which contributes to a more uniform swelling throughout the granule, while the addition of foundry waste strengthens the structure of the granules due to the granules in the interporous walls. silicates and refractory oxides of magnesium and magnesium.

Waste metallurgical foundries have the following chemical composition:

RegO 3 20J4-25,08

CaO-a, 80-10,51

MDO31,23-34,3

 2.43-6.31 Si02 18.27-26.38 PPP 1Д8-2,49 The chemical composition of the swelling coal preparation waste is as follows:

56,93

SLO 23.88

AejO 6.77

FejOj 1.94

Cao 2.21

MgO 0.95

TlOa 1.36

SO,

2.5 0.2

3.26 P.P.P.

Examples of compositions are presented in table. one.

Physico-mechanical characteristics of the obtained filler are presented in table. 2

The lightweight porous aggregate obtained is superior to the water-assimilability and compressive strength for cleavage; In addition, the economic effect will be 2.50-3.0 rubles. per ton of filler.

Table

table 2

Claims (2)

Claim The raw material mixture for the manufacture of lightweight concrete aggregate, including fly ash, foundry waste and a binder, characterized in that, in order to increase mechanical strength, it additionally contains coal concentration waste, and as a binder sulphite-alcohol bard at. the following ratio of components, weight% " VNIIIPI Order 7689/35 Fly ash Foundry waste Coal preparation waste Sulphite-alcohol barda Sources 82.96-88.94 3-5 8-12 0.04-0.06 information taken into account during the examination 1. Japanese Patent No. 42-39598, cl. 22 E, 1967. 2. USSR author's certificate No. 620454. cl. From 04 to 31/02, 1977. Circulation 663 Subscription Branch of PPP '’Patent’ ’, Uzhhorod, st. Project, 4