DE2024321A1 - Process for the production of an insulating layer for the sealing of buildings - Google Patents

Description

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Meynadiey & Cie .. Aktlengesellsphaft, Zurich (Switzerland)

Method for producing an insulating layer for sealing

of structures

Bitumen, coal tar and the like have long been used used as a material for the waterproof insulation of structures. These insulation layers are applied using so-called hot or cold processes. While the former especially The insulation processes with cold asphalt are relatively time-consuming and complicated due to the content of flammable materials and harmful solvents are very limited in their use.

The hydro-insulation process brought a real simplification and improvement. The Austrian " Patent No. 252 24? and the Czech patent no. 104 564, a bitumen emulsion and an aqueous precipitant simultaneously and separately from one another on the one to be isolated! Base sprayed on. When the two Kom-j components takes place through immediate and complete coagulation the formation of a cohesive! Insulating layer. As a precipitant In this process, weakly acidic water or dilute solutions of mineral salts are used, preferably * wise calcium chloride «is used. The disadvantages of this waterproofing method are obvious. .

109039/0966 originally inspected

By weakly acidic water or soluble mineral salts can cement-bound subsoil are attacked. '

In the commonly used dilute solution of calcium chloride there is a risk that existing steel fittings or reinforcements will be attacked.

The addition of aqueous precipitants (solids content usually J5 to 6 $) reduces the amount of water that occurs greatly increased and the drying times accordingly lengthened, which significantly inhibits the progress of construction.

Those that occur during coagulation by aqueous precipitants Disadvantages are avoided by the method according to the invention.

The invention accordingly relates to a method of production an insulating layer for sealing structures by simultaneous Application of a bitumen / polymer emulsion and a coagulant, which is an oppositely charged emulsion and / or dispersion or a finely dispersed substance, as well as the insulating layer produced by the method according to the invention and the application of the method in civil engineering.

An insulating layer according to the invention can be produced by coagulation the disperse or emulsified phases of bitumen * tar * rubber or polymer dispersions or emulsions and the like are produced, the two components being opposite Have particle charges and are separated from each other *, but at the same time to be sprayed on to be isolated, i

Can the following combinations be used?

Underlay

Anionic bitumen emulsion + Katiönische "bitumen emulsion

109839/0 966 ORiGiWAt INSPECTED

Anionic bitumen emulsion + modified with polymer Cationic bitumen emulsion

Anionic bitumen emulsion + cationic polymer modified bitumen emulsion

Anionic bitumen emulsion + cationic polymer emulsion (latices)

Cationic bitumen emulsion + anionic polymer emulsion (Latices).

The insulating layer according to the invention can also be produced by precipitation the disperse phase of bitumen, tar and polymers modified bitumen or tar dispersions or emulsions by simultaneous but separate spraying or dusting of finely ground, finely dispersed solids on the substrate to be isolated.

The following are particularly suitable as powdery precipitants Groups of substances used alone or mixed together can be:

1. Solids that partially or completely bind the emulsion or dispersion water by chemical reaction how: ·

Cements (Portland cements, blast furnace cements, pozzolana cements, high-alumina cements, etc.) Hydraulic lime
plaster

Anhydrite
quick lime.

2. Solids that make up the emulsion or dispersion water able to partially or completely bind physically

109839/0966

Bentonite
Bleaching earth
Kaolin.

3. Solids with a large specific surface on which the emulsifiers and stabilizers of the emulsions or dispersions are bound adsorptively such as:

submicroscopic finely divided silica ("Aerosils")

natural pozzolans such as kieselguhr, trass artificial pozzolans such as finely ground blast furnace slag or brick flour slate flour
Activated carbon
Russ.

The process according to the invention shows a comparison with the hydro-insulation process the great advantage that no corrosion due to electrolysis (mineral salts) can occur and that the Total water content of the freshly sprayed insulating layer is lower. (See examples).

In addition to the port case, the corrosion effect and the lower water content of the fresh insulation layers show after the Insulations produced by powder coagulation methods have significantly improved mechanical properties, especially larger ones Stability and less vulnerability. By combining it with other substances, such as plasticizers, rubber waste, Asbestos, solid plastic powders etc., can change the properties the insulation layer produced in this way in almost any Quality range can be varied, especially with regard to their dimensional stability and tear resistance. For example, through Spraying appropriate amounts of cement and fine sand impact-resistant Layers are generated that make the mortar protection layer of the insulation, which is required in many cases today, superfluous do. 109839/09 66

example 1

Component A; Anionic emulsion of bitumen B 200 60% component B; dilute aqueous solution of calcium chloride

Mixing ratio A: B = 100: 15 water content 1 hour after spraying (10 ° C, 65 % rel.

Humidity): $ 45.1.

Example 2

Component A: Anionic emulsion of bitumen B 200 component B; Cationic emulsion of bitumen B 200

Mixing ratio A: B = 100: 100 water content 1 hour 3 humidity): 36.2 %,

Water content 1 hour after spraying (10 ⁰ C, 65 # rel.

Example 3

Component A: Anionic bitumen polymer emulsion A (6o

(Polymer: bitumen 14:86) Component B: dilute aqueous solution of calcium chloride

Mixing ratio A: B = 100: 12 water content 1 hour after spraying (-10 ⁰ C, 65 $ rel.

Humidity): 33.3 %

Example 4

Component A: Anionic bitumen polymer emulsion B (60

(Polymer: Biturnen 28:72) Component B: Cationic emulsion of bitumen

Mixing ratio A: B = 100: 100 water content of 1 hour after the spraying (10 ⁰ C, 65% RH): 28.856.

Example 5

Component A: Anionic bitumen polymer emulsion C

(Polymer: Biturnen 14:86) Component B: dilute aqueous solution of calcium chloride

109 839/0 96 6 ■■■■. ■, ■ <. &%

Mixing ratio A: B = 100: 12 water content 1 hour after spraying (10 ⁰ C, 65 % rel.

Moisture): 30.2%, softening point (ring and ball) after drying for 48 hours at 130 ⁰ C: 104 ° C

Needle penetration 25 ° C (not dried): 89 1/10 mm.

Example 6

Component A: Anionic bitumen H polymer emulsion C (βθ J & lg)

(Polymer: bitumen 14:86) Component B: Portland cement

Mixing ratio A: B = 100: 32 water content 1 hour after spraying (10 ° C, 65 % rel.

Humidity): 17.5 # softening point (ring and ball) after drying for 48 hours

Needle penetration 25 ° C (not dried): 32 1/10 mm.

Example 7

Component A: Anionic bitumen polymer emulsion C (60

(Polymer: Bitumenl4: 36) Component B: Bentonite

Mixing ratio A: B = 100: 25 water content 1 hour after spraying (10 ° C, 65 % rel.

Humidity): 24.9 % softening point (ring and ball) after drying 48 hours at 130 ° C: 125 ° C needle penetration 25 C (not dried): 66 1/10 mm.

Example 8

Component A: Anionic bitumen polymer emulsion C (βθ

(Polymer: Biturnen 14:86) Component B: Slate flour (90 ^ <0.06 mm)

Mixing ratio A: B = 100: 54

109839/0 96

Water content 1 hour after spraying (10 C, 65 % rel.

Humidity): 6.4 %

Softening point (ring and ball) after drying 48 hours at 150 ° C: 146 ° e

Needle penetration 25 ° C (not dried): 36 1/10 mm.

Example 9

Component A: Anionic bitumen polymer emulsion C (60 $ ig)

(Polymer: bitumen 14:86) Component B: Rheinisches Trassmehl (DIN 51 043)

Mixing ratio A: B = 100: 46

Water content 1 hour after spraying (10 ° C, 65 # rel.

Humidity): 21.8 %

Softening point (ring and ball) after drying for 48 hours at 150 ° C: 162 ⁰ C.

Needle penetration 25 ⁰ C (not dried): 30 1/10 mm.

Example 10

Component A: Anionic bitumen polymer emulsion C (60 #ig)

(Polymer: bitumen 14:86) Component B: Portland cement / snowflake 1: 1

Mixing ratio A: B = 100: 40

Water content 1 hour after spraying (10 ° C, 65 % rel.

Humidity): 6.9 56.

Softening point (ring and ball) after drying for 48 hours at 130 ° C: 135 ° C

Needle penetration 25 ⁰ C (not dried): 35 1/10 mm.

Example 11

Component A: Anionic bitumen polymer emulsion C (60

(Polymer: Biturnen 14:86) Component B: cement / bentonite 1: 1

Mixing ratio A: B = 100: 28

Water content 1 hour after spraying (10 ^° C., 65 % rel.

Humidity): 19.1 %

109839/0966

Softening point (ring and ball) after drying 48 hours at

Needle penetration 25 ° C (not dried): 40 1/10 mm.

Example 12 ,

Component A: Anionic bitumen polymer emulsion C (60 follow)

(Polymer: bitumen 14:86).

Component Bi Portland cement

Mixing ratio A: B = 100: 100

Water content 1 hour after spraying (10 C / 65 $ rel.

Moisture): 10.2 %

Softening point (ring and ball) after drying for 48 hours at 120 ⁰ C:> l80 ° C

Needle penetration 25 ⁰ C (not dried): 14 l / lO mm.

Example 13

Component A: Anionic bitumen polymer emulsion C (60

(? olymer: bitumen 14:86) Component B: Portland cement / quartz sand (0-1.2 mm) 1: 3

Mixing ratio A: B = 100: 150

Water content 1 hour after spraying (10 C, 65 % rel.

Humidity): 16.2 #

Softening point (ring and ball) after drying for 48 hours at 130 ⁰ Ci 170 ° C.

As such, emulsions and dispersions of virtually any concentration can be used. For economic reasons, you will always choose the emulsion or dispersion with the highest solids content that can just be sprayed. The concentration is suitably between 30 and 70% ₉ preferably 50 to 70%.

The mixing ratio between emulsion on the one hand and powdery Precipitant, on the other hand, is included for insulation

103839/0966

100: 5 to 100: 60, preferably 100: 10 to 50, for protective layers at 100: 200 to 1000.

The inventive method can be used for the isolation of Buildings in civil engineering, in particular for tunnels, ceilings, galleries, caverns, troughs and foundations as well as for insulation of foundation and retaining walls and flat roofs, as well as for insulation against gases.

109839/0966

Claims (11)

Patent claims: 1. Process for the production of an insulating layer for sealing concrete structures by simultaneously applying a bitumen / polymer emulsion and a substance which breaks the emulsion, characterized in that the coagulant an oppositely charged emulsion and / or dispersion or finely dispersed substances are used. 2. The method according to claim 1, characterized in that one has an anionic bitumen or tar emulsion or one with polymer modified anionic bitumen or tar emulsion with a cationic bitumen or tar and / or polymer emulsion falls. 3. The method according to claim 1, characterized in that one a cationic bitumen or tar emulsion or a cationic bitumen or tar emulsion modified with polymer an anionic bitumen or tar and / or polymer emulsion falls. . 4. The method according to claim 1, characterized in that finely divided solids are used simultaneously with the bitumen emulsion sprayed or dusted on the surface to be insulated. 5. The method according to claim 1, characterized in that one substances used as coagulants that chemically or physically bind the water. 6. The method according to claim 1, characterized in that substances are used as coagulants on their surface the emulsifiers and stabilizers of the emulsions or dispersions are bound by adsorption. 7. The method according to claims 1 and J>, characterized in that 109839/0966 net that one can use cements, hydraulic coagulants Lime, gypsum, anhydrite or quick lime are used. 8. The method according to claim 1 or J5, characterized in that that bentonite, bleaching earth or kaolin are used as coagulants. 9. The method according to claim 1 or 3 *, characterized in that that submicroscopically distributed silica, natural pozzolans such as kieselguhr, trass, and artificial ones are used as coagulants Pozzolans such as finely ground blast furnace slag or brick dust, Slate flour, activated charcoal or soot are used. 10. Insulating layers produced according to claim 1. 11. Application of the method according to claim 1 in civil engineering. 109839/0966