SU948946A1 - Concrete mix - Google Patents

Description

one

The invention relates to construction materials, in particular to concrete mixtures, including portland cement, coarse and fine aggregate, and water used for the production of structural building materials.

A known concrete mixture of tu containing pozzolan Portland cement, coarse aggregate containing carbonate rock — limestone crushed stone of fraction 5–10 mm, and fine aggregate of fraction not larger than 5 mm, containing limestone sawmill waste, and water in the following ratio of components, wt .:

Gypsum builder9, 1-1.9

ny

Pozzolanic

5.5-9.0 Portland Cement 3.7-6.0 Truss

Lime crushed stone frak33 ,, 2 tion 5-10 mm

Stone sawing waste limestone fraction not larger

26.8-30.0 5 mm Water

Rest

However, products based on such a mixture have a significant water absorption, thermal conductivity coefficient and have low strength.

Closest to the proposed technical essence and the achieved effect is concrete mix 2, including Portland cement, coarse aggregate - crushed stone from limestone - shell rock, not exceeding

20 20 mm, fine aggregate - sand from limestone - shell rock and water in the following ratio of components m.ch .:

Portland cement 7.6-7.8 Shell limestone crushed stone26 Sand from shell limestone 9 Water k, 2-l, S However, products based on this concrete mixture have a high bulk density, high thermal conductivity and increased water absorption.

The aim of the invention is to reduce the bulk density and decrease the coefficient of thermal conductivity and water polishing.

This goal is achieved by the fact that concrete is a mixture of Portland cement, coarse carbonate aggregate, at least one of the group: marble, shell rock, travertine; Three of the group of small carbonate aggregates: shell rock, limestone stone sawmill waste, marble, and water, additionally contain coarse aggregate made of red brick or crushed expanded clay, fine aggregate made of granite, the remaining or cast-iron grains and at least one component and groups: gabbro, labradorite, bezalt in the following ratio of components, ma.ch:

Portland cement

carbonate 9.0-11.0 Coarse aggregate one of the group: marble shell rock,

travertine 6.0-7.0 Fine carbonate aggregates, three from the group: shell rock or

travertine 3.0-7.0 Stone sawing waste limestone 3, 0-7.0

Marble2,5-3,2

Water5.0-10.0

Red brick or crushed

expanded clay. 9.0-11.0 Granit2.8-3.5

Steel or cast iron shot slit 0, 1-0,3 One component from the group: gabbro, labradorite basalt 0,, 8 The concrete mix used Portland cement of the AOE and 500 grades. All other components of the concrete mix that make up the large and small aggregate are building waste and sawing waste.

The concrete mix is prepared as follows.

First, a mixture consisting of only a coarse aggregate is prepared by mixing the components. .

The resulting mixture is moistened with water until complete water saturation, water is consumed in an amount of 0.2-0.4 wt.h. of the total estimated amount required for the preparation of the concrete mix, depending on the water-absorbing properties of the components of a large aggregate.

Then a mixture of fine aggregate, sawmill waste and cement is prepared. In the process of preparing this mixture, the remaining amount of mixing water is added to it. The resulting mixtures are combined.

Products are molded from the resulting concrete mix and subjected to heat and moisture treatment to obtain tempering strength.

Examples of the proposed and known concrete mixtures, as well as the physicomechanical properties of the samples based on them are given in the table.

Proposed Portland Cement M kOQ

Water

Coarse aggregate

mm fraction:

marble

fight red

bricks

Fine aggregate fraction up to 5 mm:

rock sawing waste is known to

marble shell rock. granite

steel shot slit

gabbro

Portland Cement M 500

Water

Coarse aggregate fraction 5-20 mm:

marble

shell rock crumb claydite

Fine aggregate fraction 5 5 mm:

0.28

0.57

1560 /

432 0.52

0.19

1535

3.0

2.5

2.8

0.1

0.3 0.1

439 0.58

11.0

10.0

5 2.5

11.0 m

1610

0.21

Portla cement

10.0 M 500

1580

0.31

0.5

Water

Coarse aggregate fraction 5-20 mm:

shell rock

Claydite fine Fine aggregate fraction of 5 mm:

waste stone ... laziness is known to

 marble

shell granite

cast iron shotgun

gabbro

basalt

Portland cement

M 00

Water

Coarse aggregate fraction 5-20 mm:

travertine

fight red

bricks

Fine aggregate fraction 5 m

rock sawing waste is known to

marble

travertine

0,

0.59

t6t "0

3.2

0.2

0.6

7.9

26

a9, 0

i, 5

It follows from the above data that concrete on the basis of the proposed mixture as compared to concrete on the basis of a known composition is characterized by 3.80 - 2 times less water absorption and 2.0-3.2 times. The lower coefficient of thermal conductivity, the bulk density of concrete is reduced by 27- 35% claims

Concrete mix, including Portland cement, coarse carbonate, aggregate, at least one of the following groups: marble, shell rock, travertine; small carbonate aggregates, three from the group: shell rock, travertine, limestone sawmill, marble and water, about t and and so on, in order to reduce the bulk density and decrease the thermal conductivity and WATERPO

polishing, it additionally contains coarse aggregate made of bo red brick or crushed expanded clay, fine aggregate of granite remaining or cast-iron fraction, and at least one component from the group: gabbro, labrodorite, basalt in the following ratio of components-. mach. .:

2.20

0.61

2360

Portland cement Coarse carbonate aggregate is one of the group: marble, shell rock: shechnik, travertine. Small carbonate aggregate, three from the group: shell rock or

Travertine Waste stone limestone Marble

Water

Fight of a red brick or crushed granite

Steel or cast-iron shot-slit At least one component from the group: gabbro, labrodorite, basalt 13 Sources of information taken into account during the examination 1. Author's version of the USSR №, cl. S 15/00, 1978. 9 "89 6- U 2. Mailn R. RL Concrete on carbon aggregates. Nz-in Rostov University, 19b7, p. 81,99 (prototype).

Claims (2)

Claim Concrete mixture, including Portland cement, large carbonate, for-. padding at least one of. groups: marble, shell rock, travertine; fine carbonate aggregates. three from the group: shell rock, travertine, limestone stone-cutting waste, marble and water, characterized in that, in order to reduce the bulk mass and reduce the thermal conductivity and 8ODOPO1 - glazing, it additionally contains large aggregate from red brick battle or crushed expanded clay, small aggregate made of granite of the remaining or cast-iron fraction-cut and at least one component from the group: gabbro, labrodorite, basalt in the following ratio of components, wt.h .: Portland cement 9.0-11.0 Large Carbo 35 One of the group: marble, rakug; shechnik, travertine 6.0-7.0 40 Shallow carbonate aggregates, three of the group: shell rock or travertine 3.0-7.0 45 t Limestone rockstone waste 3.0-7.0 Marble 2.5-3.2 Water 5.0-10.0 fifty Red brick fight or crushed- 9.0-11.0 expanded clay Granite 2.8-3.5 Steel or steel - shotgun 0.1-0.3 55 At least % one component from the group: gab - bro, labrodoritis, basalt 0.4-0.8 6 14 2. Mayilyan R. L. Concrete on carbonate aggregates. Nz-in Rostov University, 1967, p. 84.99 (prototype).