SU990743A1 - Composition for impregnating concrete - Google Patents

Description

(5) COMPOSITION FOR CONCRETE DRINKING

one

The invention relates to a technology for the manufacture of building materials, namely, compositions for impregnating concrete.

Concrete is impregnated with, for example, styrene monomer, followed by polymerization tl.

The closest in technical essence and the achieved result is the composition 12 for impregnating concrete, including, in wt.%: Low molecular weight polyethylene 05-95 Acetone 5-15

The disadvantages of the known solutions are relatively high water absorption, porosity and water permeability.

The purpose of the invention is to reduce water absorption, porosity and permeability of concrete.

The goal is achieved in that a composition for impregnating concrete, including a low molecular weight polyolefin

and diluent, contains and quality. low molecular weight polyolefin low molecular weight polyisobutylene and thinning agents from the toluene group, xylene, white spirit, mineral oil in the following ratio of components,

Moe

Low molecular weight polyisobis. Tylen (0-50

ten

Thinner 50-60

Low molecular weight polyisobutylene with a molecular weight of 5,000 to 50,000 is a non-drying and hardening, viscous mass that does not practically change its properties within the temperature range from -50 to. It has a high elongation and good adhesion to most materials.

20 When heated to and above, it turns into an oily liquid, well impregnating building materials.

Impregnation with low molecular weight prisisobutylene is recommended for the protection of reinforced concrete structures operating in aggressive conditions at temperatures no higher than and below –50 ° C.

Low molecular weight polyisobutylene is readily soluble in petroleum solvents and mineral oils. This property of low molecular weight polyisylbutylene is used to accelerate the impregnation process.

Impregnation of building products with low molecular weight polyisrbutylene is carried out according to the following technology; immersing products in the melt at 100-280 ° C; immersing the products in the solution (low molecular weight polyisobutylene + solvent} at 20–30 ° C; coating the product surface with subsequent heating or without heating; by feeding it into technological voids or special holes; and also by a combination of these methods.

Concrete samples exposed to the impregnation of the proposed composition

made from a mixture of Port V cement M VOO as a cement, silica sand with a particle size module of 2.0 specific weight 2-b5 g / cm, bulk weight 1.65 kg / l, crushed granite fraction mm s specific gravity of 2-65 g / cm.

The proportion of the constituents of the concrete mix is 1: 2.0: 2.9 with an OK value of 3 cm.

Samples are subjected to thermal treatment in a steam chamber at 80-85 ° C.

The compositions of protopic compositions, are presented in table. one.

The test results of concrete samples are presented in Table. 2

The proposed composition can be successfully used to hydrophobize concrete products with the aim of increasing their resistance to corrosion, which contributes to increasing the durability of building structures operating under corrosive environments.

Low molecular weight polyethylene

Acetone

Low molecular weight polyisobutylene

Machine oil

Organic solvent (toluene, xylene, white spirit)

Table 1

95 85 5 15

0 50 60

Claims (2)

Formula composition 50 of the invention for impregnating concrete comprising a low molecular weight polyolefin and diluent, characterized in that in order to reduce water absorption, porosity and water permeability of concrete, it contains as low molecular weight polyolefin and low molecular weight polyisobutylene diluent from the group of toluene, xylene, Whitehead spirit, mineralTable2 oil in the following ratio of components, wt.%: Low molecular weight polyisobutylene0-50 Thinner50-60 Information sources taken into account during the examination 1.The author SK USSR certificate No. 125506, C B 1/28, 195. 2. USSR author's certificate 503562, С ОА В (1/28, 197.