SU761440A1 - Concrete mix - Google Patents

Description

The invention relates to compositions of the concrete mixture used for finishing work.

Concrete mixtures used for decorative purposes are known [1].

The closest in technical essence and the achieved effect to the invention is a concrete mix, which includes a decorative binder, a filler and a breathtaking additive [2].

A disadvantage of the known concrete mix is the low strength of concrete and the formation of efflorescence on its surface, impairing its decorative qualities and requiring a systematic renewal of the surface, the use of special paints, which increases the cost of construction.

The aim of the invention is to increase the strength and improvement of the decorative properties of concrete.

This goal is achieved by the fact that the concrete mix, which includes a binder, a filler, and an additive, as a binder contains colored expanding cement, and as an additive is a product of processing waste of the woodworking industry in the following ratio of components, weight. %:

Color expanding cement 25-35

2

Placeholder 62.5—74.9

Waste product

wood industry 0.1–2.5,

5 and the color expanding cement contains, in weight. %:

White portlaide cement clinker 50-85

Pigment 2-10

10 Diatomite 5-15

Expanding additive 3-15

Gypsum 5-10,

at the same time, as a expanding additive, either a mixture of 70% alumina15 of slag and 30% of gypsum or a calcination product of a mixture of limestone, gypsum and alumina-containing material having the following mineralogical composition is used: C ₂ 5 - 80%; C12A7-10%; С ₄ А ₃ 5 - 10%, and as an additive, the product used is processing of wastes from the woodworking industry, which is a mixture of gluconic (50%) and sugar (50%) acids, the pH (pH) of which is 3-4.

The essence of the invention lies in the fact that when hydrating the expanding cement, calcium hydroaluminates and ettriigite are formed, compacting the concrete, which leads to an increase in strength. With

3

this formation of ettringitis is accompanied by a significant binding of Ca / OH / ₂ , which is formed due to the hydration of the Portland cement component. Ca / OH bonding / g causes further cement hydration.

Thus, it causes a more complete hydration of the cement, and therefore an increase in the strength of the concrete. This also contributes to the product of waste processing wood industry. According to its composition, it is a mixture of gluconic (50%) and sugar (50%) acids, the pH of which is 3-4. This mixture binds Ca / OH / ₂ on one side, accelerating

the elite itself, on the other hand, by promoting the solubility of aluminates, accelerates their hydration, thereby increasing its strength

5 concrete. The binding of Ca / OH / _{2 with} ettringite and a waste product causes a decrease in efflorescence on the concrete surface, which increases the durability of its decorative properties.

ten

Example. Concrete mix is prepared with the use of expanding colored cement, the composition of which is given in table. 1, a filler and product processing waste wood industry.

Table 1

№№ payment order Name Composition, % Granular composition,% of aggregate white clinker pigment expanding additive gypsum diatomite fraction, mm 0-2 2-40 one expanding colored cement according to the invention 62 ten ten ten eight thirty 70 2 P 85 2 five 3 five - - 3 50 ten 15 15 ten - - four famous colored cement 83 ten - ' 7 - - -

For comparison, a known concrete mixture was prepared. The test results are shown in Table. 2 and 3.

As can be seen from the table. 3 concrete mix according to the invention 20 provides concrete with higher strength, density. The latter provides a reduction in efflorescence on the surface of the concrete, as evidenced by a higher intensity of 25 color samples.

The use of the concrete mixture according to the invention will save cement in the production of finishing works and increase the durability of the decorative layers by reducing vysoloobrazovanie, respectively, reduce the cost of repairs.

In general, the use of the proposed concrete mix gives an economic effect of up to 2 rubles. on 1 m ^{3 of} concrete.

table 2

№№ payment order Name Composition, % Amount of water, l / m ³ Draft cone mm color cement expanding colored cement aggregate air entraining additive vinsol product recycling woodworking industry and agricultural one known by the invention thirty - 69.5 0.5 - 190 7 ' ² 1 _ 25 74.9 ___ 0.1 190 ten ³ composition number 1 - 35 62.5 - 2.5 190 15 four ) - thirty 68.7 - 1,3 199 14 ⁵ 1 _ 25 74.9 0.1 190 ten ⁶ composition number 2 - 35 62.5 _ 2.5 190 12 7) - thirty 68.7 - 1,3 190 12 " one _ 25 74.9 0.1 190 15 ⁹ composition number 3 - 35 62.5 _ 2.5 190 18 ten ) - thirty 68.7 - 1,3 190 18

Table 3

five

761440

6

payment order The name of the concrete mix Strength, kgf / cm ^and Permeability, ATM / day Intensity factor ZS 7c 28 seconds one known by the invention 80 120 200 5 atm. after 28 days 28 ² 1 130 195 275 5 atm. after 3 days 35 ³ composition number 1 190 260 350 10 atm after 3 days 42 four / 170 225 300 7 atm after 3 days 40 ⁵ 1 135 205 298 ⁷ 1 38 ⁶ composition number 2 145. 241 322 7 1 atm. after 3 days 39 7 1 168 235 316 7) 38 ⁸ 1 148 205 295 ⁷ 1 38 ⁹ composition number 3 175 272 343 7> atm. after 3 days 39 ten ) 170 265 306 7] 38

Claims (3)

Claim 1. A concrete mix that includes a binder, a filler, and an additive, characterized in that, in order to increase the strength and improve the decorative properties of concrete, it contains colored expanding cement as a binder, and as an additive, the product of processing wood waste in the following ratio of components , weight. %: Color expanding cement 25—35, Filler 62.5—74.9 Woodworking waste product industry 0.1-2.5 2. Concrete mix on π. 1, characterized in that it contains colored expanding cement of the following composition, in weight. %: White Portland cement clinker 50—85 Pigment 2-10 Diatomite 5-15 Expanding additive 3-15 Gypsum 5-10 3. Concrete mix on π. 1, characterized in that it contains the product of processing wood industry, containing, weight. %: Gluconic Acid 50 Sugar acid 50 at the hydrogen index equal to / PH / 3-4.