SU1390214A1 - Concrete mix - Google Patents

Abstract

The invention relates to compositions of concrete mixtures and can be used for the manufacture of building structures and products operating under conditions that perceived increased strength loads. The purpose of the invention is to improve the strength, modulus of elasticity and reduce the permeability of concrete. The concrete mixture contains, wt%: cement 2-10j soluble glass 5-20 composition, wt.%: 30-60; or 40-70; crushed stone quartz fraction 40 mm 33 - 36; ground glass 10-18; quartz sand coarse rest. The strength of concrete in compression is 83–120 MPa, in bending 30–35 MPa, the modulus of elasticity is 250–320 tf / cm.10, and the permeability is 11–13 atm. 2 tab.

Description

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The invention relates to compositions of concrete mixtures and can be used for the manufacture of building structures and products that work: w: them under conditions that perceived increased strength loads that have the ability B to withstand aggressive effects of concentrated salt solutions for a long period of time, acids, alkalis, water or their vapors, suitable for the construction of hydraulic structures, the upper part of the roads and the take-off and landing grounds of airfields.

The purpose of the invention is to increase the strength, modulus of elasticity and reduce the permeability of concrete.

Ground soluble glass is completely dissolved in liquid, water, and mixtures containing liquid water, which is one of the factors that make it possible to avoid the drawbacks that occur when using silicate water glass and ground silicate. Ground soluble glass, pre-mixed in dry conditions with the remaining components of the proposed concrete mix, in the period of its manufacturing technology, liquid glass of the required density is formed, enveloping all the components of the mix uniformly, thus avoiding aggregation liquid glass and create a homogeneous mixture, increasing its mobility and more complete relaxation in the process of molding building products and structures, all this creates minimal internal voltage therein. Cement is part of the proposed concrete mix as a component that regulates the rate of hardening.

The concrete mix is prepared as follows.

Dispense components, then load them into a standard concrete mixer.

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On the forced action, mix them in a dry state, then pour the required amount of water with a temperature of 80-90 ° C.

All components are mixed with water until a homogeneous mass is obtained. Within a specified period of time, ground soluble glass that is contained in the mixture is completely dissolved,. When all the components are mixed with water, a series of complex chemical processes occurs, as a result of which the proposed concrete mixture acquires a complex of enhanced physicochemical and mechanical properties with the necessary structure formation that occurs both during the manufacturing process and after the preparation of products and structures from it. and structures during their hardening.

The compositions of the concrete mixture are presented in table 1, and their properties in table 2.

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Claims (1)

25 claims O Concrete mixture, including quartz coarse sand, quartz crushed stone of 40 mm fraction, characterized in that, in order to increase strength, elastic modulus and. reducing the permeability of concrete, it contains as a cement and soluble glass composition, wt.%: PjOj- 30-60; or 40-70, and additionally ground silicate glass in the following ratio, wt.%; Cement2-10 Soluble glass5-20 Quartz crushed stone fraction mm33-36 Ground silicate glass. 10-18 Quartz coarse-grained sand Rest five 0 five  Table 1 Quartz sand Crushed stone quartz coarse-grained 40 mm Portland cement normal Ground silicate glass containing, 74-76; RjO 14-16; RO 9-11 Ground soluble glass, containing, wt.%: PzOs- 30-60; NajO 40-70 or Specific weight, g / cm Strength, kgf / cm under compression bending The modulus of elasticity, tf / cm - 10 Permeability, atm Internal stress, kg / cm Resistance ratio in drinking water with a sample content of 45 yut Coefficient stably in mineralized 34 33 32 33 34.5 36 ten 18 14 10 12,5 20 2.4 2.3 2.2 2.2 ten 0.98 0.97 0.98 0.99 0.98 0.99 „ Sinks and bloating not appeared 590 600 680