SU992464A1 - Foaming agent for forming voids in concrete mix - Google Patents

Description

(54)

FOAM CONTAINER FOR CUTTING CONCRETE MIXTURE

The invention relates to the field of building materials and can be used, in particular, in the manufacture of lightweight wall partitions from foam concrete. A foam foaming agent is known for making porous lightweight EI concretes including weight. h: bitumen &-12; primary alcohols based on alcohols 4-6. The disadvantage of this foaming agent is the low foaming ratio and low strength of the resulting concrete. The closest in technical essence and the achieved effect to the proposed is a foaming agent for lightweight concrete. Concrete 12, including weight. %: secondary alkylsul fat O, 2-O, 8; sulfite alcohol bard 0.5-1.5, the rest is water. A disadvantage of the known foaming agent is low foaming ratio (1.6-2.0) with a rather high consumption of secondary alkyl sulfate (up to 0.8 wt.%) And low strength of the resulting concrete. The goal of izofeteny is to increase the strength of concrete at the same expansion ratio. The goal is achieved by the fact that a foaming agent for porisation of a concrete mix, including an alkyl sulfate-containing component and water, contains as an alkyl sulfate-containing component a paste of synthetic fatty alcohol alkyl sulfates and additional liquid glass with the following ratio of components, wt.%: Paste of alkyl sulfates 0.1 O-Oh, glass 15 Liquid glass 0.25-0.75 WaterOther Paste alkyl sulfates of synthetic fatty alcohols (TU 38 10755-75) is obtained by sulfating synthetic fracdia fatty alcohols -. The ratio of the components of the paste following weight. %:

Alkylpuns, not less than 21.0 Unsugged compounds, not more than 19.0 Water The rest is up to 10%, Pascal alkyl sulfates are surfactant, which, when mixed with water, produces foam.

The foam is characterized by the following parameters: durability 45 min, a multiplicity of 11.

Liquid glass (an aqueous solution of sodium or potassium silicate) in the composition of the blowing agent plays the role of stabilizer of alcoxylate paste.

Liquid glass as a stabilizer adsorbs on liquid films of bubbles in the foam, thereby slowing down their spontaneous destruction. Combination, pastes of alkyl sulfates with liquid glass

dramatically increases the multiplicity of durability and increases the irability of foaming of concrete and its strength.

Foam gypsum concrete with the proposed foaming agent is prepared as follows:

An aqueous solution of the foaming agent is stirred for 1 min in a Voronezh-2 type unit. On the basis of this composition, an aqueous solution of organic substances is mixed with a gypsum-fiber mass.

To determine the strength characteristics of the foam-gypsum concrete, ofaz-beams of the size were measured and tested for compression according to GOST 125-7O.

The table shows the composition of the foaming agent and its properties.

Claims (1)

Claim Foaming agent for porizapia of the concrete mixture comprising an alkyl sulfate-containing component and water, characterized in that, in order to increase strength at the same rate of foaming, it contains a synthetic sulfate paste as an alkyl sulfate-containing component. VNIIIPI Order 360/26 0.10-0.15 0.25-0.75 The rest of fatty alcohols and additionally liquid glass in the following ratio of components, weight. %: Synthetic Fatty Alcohols Alkyl Sulfate Paste ⁴⁵ Alcohols Water Glass Water