RU2323952C1 - Embedding compound - Google Patents

Abstract

FIELD: building.

SUBSTANCE: embedding compound includes bitum and ethylene-propylene rubber and additionally contains lake XII-734 on the base of chiorsulphonated polyethylene, salamander wool, polished dust-waste of asbestos-technical things producting, the column still bottoms of reversal isopentane-isoprene cut fraction during the production of isoprene rubber on the base of isoprene oligomer with molal mass 200-300 (toluene liquor of isoprene oligomer).

EFFECT: it is increased the physic - mathematical qualities for embedment and repair of junction and conjunction of the hydraulic engineering structures.

5 cl, 3 tbl

Description

The invention relates to hydraulic engineering and is intended for sealing, repair of expansion joints in concrete and reinforced concrete lining of irrigation canals, artificial reservoirs for various purposes and water supply systems.

Known sealing mastics based on bitumen with various additives (see Reznichenko P.T. and others. Mastics in construction. - Dnepropetrovsk: "Promin", 1975, p.181-204).

However, bituminous mastics have low physical and mechanical properties, are subject to intense destruction and aging under the influence of a combination of factors of the natural environment and have extremely low operational reliability and durability.

Known mastic, including bitumen, latex, water glass, solvent and filler is the residue from peat hydrolysis (see SU, copyright certificate No. 472954, M. class ³ C08H 13/00. Mastic / BC Shimansky, G.A. Evdokimova, V .I. Medved et al. - Application No. 1937661 / 29-33; Announced 06/14/1973; Publish. 05.06.1975, Bull. No. 21).

Known sealant, including bitumen, rubber crumb, coumarone resin, butyl rubber, softener oligovinyl ethanolamine (see SU, copyright certificate No. 621715, Mcl. ³ C09K 3/10, C08L 95/00. Sealant / V. A. Piskarev, O .A.Krasnovskaya, E.G. Balalaev and others. - Application No. 2434725 / 23-05; Stated 12/27/1976; Publ. 08/30/1978, Bull. No. 32).

The closest analogue in essence to the claimed invention is a sealant for sealing joints of prefabricated structures, including bitumen and a modifying additive - ethylene propylene rubber (see SU, copyright certificate No. 321495, IPC С04B 13/30. Sealant / AMKisina, N.V. Stabnikov and L.M.Simonovsky. - Application No. 1422226 / 29-33; Stated 03/31/1970; Publish. 11/19/1971, Bull. No. 35).

However, the aforementioned sealant has a relatively high rate of water absorption, which contributes to the filtration (leakage) of water through the joints and expansion joints of hydraulic structures, in particular antifiltration linings of irrigation canals and reservoirs, and has extremely low elongation at low temperatures (less than 3% at 21 ° C), and low heat resistance, which significantly limits the scope of its application in hydraulic engineering (see Lukinsky O.A. ty sealing joints in irrigation and drainage facilities // Hydrotechnics and Land Reclamation. 1971, No. 5, p. 44-48).

The essence of the claimed invention is as follows.

The problem to which the claimed invention is directed is the creation of a sealant with high physical and mechanical properties for sealing and repair of expansion joints and joints of hydraulic structures, in particular, antifiltration linings of channels and reservoirs.

The technical result is an increase in the relative elongation and heat resistance of the sealant, a decrease in its water absorption. The specified technical result is achieved by the fact that the sealant, mainly for sealing joints and expansion joints of monolithic and prefabricated concrete and reinforced concrete antifiltration linings of channels and ponds, including bitumen and ethylene-propylene rubber, according to the invention additionally contains lacquer HP-734 based on chlorosulfonated polyethylene, chrysotile asbestos, grinding dust-waste from the production of asbestos technical products, bottom residue of the rectification column of the return isopentane-isoprene fraction during the production of isoprene rubber based on isoprene oligomer mol. weighing 200-300 (toluene solution of isoprene oligomer) in the following ratio of components, wt.%:

Bitumen 5-30 Ethylene propylene rubber 5-15 HP-734 varnish based on chlorosulfonated polyethylene 20-75 Distillation column residue return isopentane-isoprene fraction when based isoprene rubber production isoprene oligomer with mol. weighing 200-300 (toluene solution of isoprene oligomer) 5-20 Asbestos chrysotile 5-10 Grinding dust-waste production asbestos technical products 5-10

The maximum effect is achieved when BN 90/10 bitumen and SKEP-60 ethylene propylene rubber are introduced into the sealant. In addition, the composition of the proposed sealant may use bitumen grades SKEP-50, SKEP-40, the use of which allows to achieve the claimed technical result.

In order to increase the weather resistance of the sealant, when the bitumen content in it is more than 20 wt.%, N, N′-diphenyl paraphenylenediamine technical (Diafen FF-T) in the amount of 0.3-0.5 wt.% Or naphtham-2 is additionally introduced into the sealant in an amount of 0.3-0.5 wt.% in combination with thiuram D in an amount of 0.3-0.5 wt.%.

To accelerate the hardening process of the sealant in expansion joints and joints of structures, a vulcanizing additive is additionally introduced into the sealant - technical sulfur (sulfur oxide) in an amount of 0.8-1.0 wt.%.

To increase the adhesion of the sealant to the concrete surfaces of the elements to be joined together, the sealant additionally includes bottoms of synthetic B grade fatty acids (KOSZHK) in an amount of 0.8-1.2 wt.%.

Example. In the apparatus of a high-speed mixer with a capacity of 80-100 l, equipped with a grinding device in the form of a rotating shaft with a perforated disk and a preload mechanism, the following components are simultaneously placed in a predetermined ratio: solid bitumen BN 90/10 (in cold condition); ethylene propylene rubber SKEP-60; HP-734 varnish; isoprene oligomer toluene solution; grinding dust; chrysotile asbestos, grade 7; if necessary, N, N′-diphenyl paraphenylenediamine technical (FF-T diaphene) or naphtham-2 in combination with thiuram D, CFCFA and technical sulfur are additionally added to the sealant’s working composition in a given ratio. The installation is started up and the loaded materials are mixed for 15-20 minutes until the bitumen is completely dissolved and a homogeneous mixture is formed.

In the presence of bitumen preheated to 110-120 ° C, the mixture is mixed with conventional propeller-type mixers with a rotation speed of 70-120 rpm.

The prepared mastic (sealant) is poured into a container with hermetically sealed lids for storage. Sealant (mastic) is applied under pressure with the help of special devices to expansion joints and joints of structures without heating, which reduces energy consumption and laboriousness of work.

Table 1-3 shows the composition of the sealant and the test results of its properties.

Table 1 Components The content of components, wt.% one 2 3 four 5 6 7 8 9 10 eleven Famous one 2 3 four 5 6 7 8 9 10 eleven 12 13 Bitumen BN 90/10 5 twenty 21 21 5 twenty thirty thirty twenty thirty thirty 85 Ethylene propylene rubber 5 10 8.7 8.4 5 9.2 fifteen fifteen 10 fifteen fifteen fifteen SKEP-60 LacKhP-734 75 40 40 40 74 40 twenty twenty 40 twenty twenty - The bottom residue of the rectification column of the return isopentane-isoprene fraction in the production of isoprene rubber based on isoprene oligomer mol. weighing 200-300 (toluene solution of isoprene oligomer) 5 twenty twenty twenty 5 twenty 14.5 fourteen 19.2 13.3 12.8 - Asbestos chrysotile 7 grades 5 5 5 5 5 5 10 10 5 10 10 - Grinding dust 5 5 5 5 5 5 10 10 5 10 10 10 N, N′-Diphenyl-paraphenylenediamine (technical diafen FF-T) - - 0.3 - - - 0.5 - - 0.5 - - VAT residue of synthetic grade B fatty acids - - - - - - - - 0.8 1,2 1,2 - Naftam-2 - - - 0.3 - - - 0.5 - - 0.5 - Tiuram D - - - 0.3 - - - 0.5 - - 0.5 - Technical sulfur (sulfur oxide) - - - - 1,0 0.8 - - - - - -

table 2 Sealant properties Indicators for the composition one 2 3 four 5 6 7 8 9 10 eleven Famous The relative elongation of the sealant under tension in accordance with GOST 26589-94,%: - at + 25 ° C 360 350 345 340 357 348 325 323 351 320 318 230 - at -20 ° C fifty 41 35 34 52 38 33 32 40 31 thirty 2 Water absorption according to GOST 4650-80 *, wt.% 0.05 0.06 0,07 0,07 0.05 0.06 0.08 0.08 0.06 0.08 0.08 0.35 Heat resistance (fluidity) of the sealant at an inclined angle angle of 60 ° to 0 0 0 0 0 0 0 0 0 0 0 four horizontal plane at a temperature of 60 ° C, mm (a single technique)

Table 3 Components GOST, TU, technological regulations Component Feature one 2 3 Bitumen: BN 90/10 GOST 6617-76 * Obtained by oxidation of residual products of direct distillation of oil and their mixtures with asphalts and extracts of oil production. The penetration depth of the needle at 25 ° C, OD 5-20 mm, the softening temperature of the ring and ball ≥90 ° C, extensibility at 25 ° C, ≥1 cm, solubility in benzene ≥99%, weight change after heating ≥1%, flash point ≥240 ° С, content of water-soluble compounds ≤0.3%, water content - traces Varnish HP-734 TU 6-02-11-52-81 A solution of chlorosulfonated polyethylene (CSPE) in solvent, xylene or toluene. Mass fraction of non-volatiles ≥17%; mass fraction of chlorine in terms of KhSPE 26-34%, mass fraction of sulfur in terms of KhSPE 1.3-2.2%.
Resistant to virtually any aggressive environment, ozone-resistant and temperature-resistant material. It is used for corrosion protection of deformable building structures in a complex chemically resistant coating with enamels HP-799 and independently, as well as for priming and filling the surface of protected structures. Conditional viscosity at 20 ± 2 ° С no more than VZ-1 with a nozzle diameter of 5.4 mm is 70-90 s. Drying time, ≤5 h. The bottom residue of the rectification column of the return isopentane-isoprene fraction in the production of isoprene rubber based on isoprene oligomer mol. weighing 200-300 (toluene solution of isoprene oligomer) The technological regulation of the rectification of the return isopentane-isoprene fraction VAT residue column 526 in the production of isoprene rubber. Like weight 200-300. Composition, wt.%: Toluene 29.7-69.1; isopentane 0.05-0.50; trimethylene 7.5-19.1; isoprene oligomer 20.35-38.00; trimethylcarbinol 3-12.17 Asbestos chrysotile 7 grades GOST 12871-93 * The chemical composition approximately corresponds to the theoretical formula 3MgO-2SiO ₂ -2H ₂ O. So pl. 1450-1500 ° C, heat resistance (loss of constitutional water and strength) with long-term continuous heating of 500 ° C, with short-term heating of 700 ° C, alkali resistance is high, the content of soluble substances in 25% KOH when boiling for 4 hours ≤5%, acid resistance weak. Grinding dust TU-38.3146-78 Waste production plant asbestos industrial products. The bulk density of 0.4-0.6 g / cm ³ . It is obtained by grinding autoformed parts, consisting of a mixture of vulcanized rubber, asbestos, barite, iron minium, alumina, cryptocrystalline graphite and others. Chemical composition, wt.%: Butadiene rubber 14.0-16.3; iron oxide 1.2-11.6; magnesium oxide 4.0-19.7; zinc oxide 0.4-3.1; zinc dioxide 0.4-3.1; silica 4.0-5.5; sulfur 1.0-2.2; carbon black 15-23; acetone extract (solid residue) after evaporation of acetone used in technological the process of manufacturing auto-molded parts. 1.4-2.6; Barium sulfate 16.0-59. Mass fraction of fraction <0.25 mm ≥95%,> 1 mm ≤1%. N, N′-Diphenylparaphenylene-diamine (technical di-athene FF-T) TU 6-14-10-173-85 It is intended as an antioxidant for rubber SKI-3.
Appearance - black paste, mass fraction. %: secondary amines ≥6.6: impurities insoluble in alcohol-toluene mixture ≤7.0; ash ≤8.5; volatiles and water ≤50; fractions of size ≤0.8 mm ≥75. fraction> 2.0 mm in size is absent. VAT residue of synthetic fatty acids (grade B) OST 38.01182-80 VAT residue of synthetically fatty acids is obtained by reactivation or distillation of crude fatty acids. VAT residue is a mixture of higher fatty acids C ₂₁ and higher, mainly saturated monocarbolic, as well as unsaponifiable substances and resinous products of condensation and polymerization. Acid number 70-90 mg; mass fraction of fatty acids not less than 77 wt.%; mass fraction of water not more than 0.5 wt.%, flash point 270 ° C; autoignition temperature 290 ° С. Technical sulfur (sulfur oxide) GOST 127-76 * E Vulcanizing additive Naftam-2 GOST 39-79 * E Antioxidant - Antioxidant Tiuram D GOST 740-76 ** E Stabilizer

From the data presented in Tables 2-3, it follows that the proposed sealant composition, mainly for sealing joints and expansion joints of monolithic and prefabricated concrete and reinforced concrete antifiltration linings of channels and ponds, has higher physical and mechanical properties compared to the known sealant composition ( prototype).

Thus, the research results (see table 2) indicate that the proposed invention achieves the indicated technical result, namely: an increase in elongation under tension and heat resistance of the sealant, a decrease in its water absorption compared to the known sealant (prototype).

Claims (5)

1. Sealant mainly for sealing joints and expansion joints of monolithic and prefabricated concrete and reinforced concrete antifiltration linings of channels and ponds, including bitumen and ethylene-propylene rubber, characterized in that it additionally contains varnish KP-734 based on chlorosulfonated polyethylene, chrysotile asbestos, and grinding dust - waste from the production of asbestos technical products, bottoms from the rectification column of the isopentane-isoprene fraction rectification column in the production of isoprene rubber based on isoprene Vågå oligomer mol. weighing 200-300 (toluene solution of isoprene oligomer) in the following ratio of components, wt.% .: bitumen 5-30 ethylene propylene rubber 5-15 HP-734 varnish based on chlorosulfonated polyethylene 20-75 distillation column residue return isopentane-isoprene fraction when based isoprene rubber production isoprene oligomer with mol. weighing 200-300 (toluene solution of isoprene oligomer) 5-20 chrysotile asbestos 5-10 grinding dust-waste production of asbestos industrial products 5-10 2. The sealant according to claim 1, characterized in that when it contains bitumen in excess of 20 wt.%. N, N′-diphenylparaphenylenediamine technical (Diafen FF-T) in the amount of 0.3-0.5 wt.% is additionally introduced into the sealant. 3. The sealant according to claim 1, characterized in that when it contains bitumen in excess of 20 wt.%. the antioxidant naphtham-2 is additionally introduced into the sealant in an amount of 0.3-0.5 wt.%. and the stabilizer is thiuram D in an amount of 0.3-0.5 wt.%. 4. The sealant according to claim 1, characterized in that it further comprises a vulcanizing additive - technical sulfur (sulfur oxide) in an amount of 0.8-1.0 wt.%. 5. The sealant according to claim 1, characterized in that in its composition is additionally included bottoms of synthetic fatty acids of grade B in an amount of 0.8-1.2 wt.%.