DE2013476A1 - Reinforcing material for asphalt layers based on synthetic textile material and process for the manufacture of a binder which is used when manufacturing such a reinforcing material - Google Patents

Description

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Reinforcement material for asphalt layers

on the basis of synthetic textile material and process for the production of one

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Binder that is used when making

produces such a reinforcing material

The present invention relates to reinforcement material for Asphalt layers based on. synthetic textile material. . '

It is known to use synthetic textile material as reinforcement material in asphalt layers that are used in road construction and also in construction and hydraulic engineering. An important problem here is sufficient adhesion

009.040 / Uta

- 2 to effect between the reinforcement material and the asphalt.

The present invention provides a reinforcement material the basis of synthetic textile material, which adheres perfectly to asphalt when the latter is used in road construction, when Construction and hydraulic engineering is used.

The reinforcing material according to the invention consists of synthetic Material impregnated with a mixture of aromatic hydrocarbon resin and bitumen.

By the term "bitumen" is meant products identified as such in "The Petroleum Handbook", published 1948 by "The Shell Petroleum Company Limited", page 549. It is also believed that mineral wax is to be equated with bitumen.

Preferably the bitumen and the aromatic resin are in a weight ratio in the reinforcing material according to the invention of at least 1:12 available.

The synthetic textile material can be of various types. It can e.g. consist of polypropylene, polyethylene, a polyamide, glass, polyesters and the like. It can be in the form of filaments, loose fibers, multifilaments, narrow stripes, knitwear, fabrics, etc.

The present invention also relates to a binder which is used in the production of the reinforcing material according to the invention is used.

According to the present invention, such a binder can be prepared by adding an aromatic hydrocarbon together with bitumen in an organic solvent] dispersed using an emulsifier.

009840/1482

It is preferred to use an aromatic hydrocarbon resin with an aromatic content of over 90 % ₁ a naphthene content of less than 5%, the molecules of the aromatic constituents comprising ring systems containing an average of 3 to 4 condensed rings, the ring systems being a few short distances alinhc =! * -wearing s ^ ited chains.

An aromatic hydrocarbon resin can be obtained, for example, as a residue when cracking crude mineral oil.

An example of an aromatic hydrocarbon resin that which can be successfully applied in accordance with the present invention is a resin having the following properties:.

Ratio between the number of carbon atoms and the number of hydrogen atoms: 1.06

Color according to the "coaltar scale" 22

specific weight 1.4

Acid number, maximum 1

Saponification number, maximum 1

F about 100 ^° C

A bitumen with a permeability value is preferably used as the bitumen (penetration value) between 50 and 220 is used, when choosing the bitumen, one will also consider the type of asphalt, in which the reinforcement material is to be used.

Vieri "it. Ξ η sin eirxiricuncii ^ eniiifiss"i.ri'jüH'ix.'ce! iitii si.fl.Xi. v ^ jlv ^ uO ¹ ?! one preferably uses a non-ionic emulsifier, e.g. Emulan AF from BASF (this is an ethoxylated fatty acid alcohol of medium molecular weight, which is known as an emulsifier for oil-in-water emulsions and dispersions of organic material in organic solvents) and / or Emulphor EL from BASF (ether: cylated castor oil).

009840/1482 "", " _mPECrED

When preparing a binder according to the invention, ethyl acetate is preferably used as the solvent. A very suitable one. Binder is a mixture consisting of 10 to 60% by weight of an aromatic hydrocarbon resin and more than 30% by weight of organic solvent and at least 5% bitumen and at least 1 % emulsifier.

This is the preferred way to go when making the binder. suggest that the resin and the bitumen are melted together, whereupon the ethyl acetate and then the emulsifier W are added and the whole is allowed to cool while stirring vigorously. The bitumen and the resin are melted together, for example, before adding the ethyl acetate at a temperature of 130 ⁰ C, then allowed to cool to below lOO ° C. The emulsifier is then added at a temperature between, for example, 40 and 90 ° C., whereupon the whole is allowed to cool while stirring vigorously. This gives a homogeneous mixture that does not change. lower temperatures, for example 5 ° C, separates again.

A binder so produced can be applied to textile material, e.g., a woven fabric, at any desired temperature are made by dipping the textile material in the binder or by spraying it. The threads of the textile material hold in generally 35% by weight of the binder (dry weight).

example

15 parts by weight of bitumen having a permeation value of were mixed with 35 parts by weight of the aromatic hydrocarbon resin mentioned above, melted at a temperature of 130 ⁰ C. The melt was cooled to below 100 ° C with stirring, followed by 45 parts by weight of ethyl acetate hinzugab., Then was oie The mixture was cooled to below 90 ° C. with stirring, whereupon 5 parts by weight of Emulan AF were added "

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, The mixture was cooled with stirring, whereby a • received homogeneous mixture.

A fabric made of polyester multifilament with a mesh size of 10 10 mm was immersed in the binder produced in this way, taking up about 90 g of binder (after drying) per m. After removal from the binder bath was allowed to dry the binder at 40 to 5O ⁰ C, wherein the ethyl acetate evaporated "

To explain the effect of the reinforcing material according to the invention, the following comparative tests were carried out:

Test pieces were made from an asphalt mixture containing 42% by weight of fine sand with a maximum grain size of 3 mm, 53% coarse sand with a grain size of 3 to 8 mm, 5% limestone powder and 6% bitumen (based on the total mineral) with a Penetration value of 80/1000, these test pieces being compacted in a Marshall compactor after being shaped to have a length of 35 cm, a width of 5 cm and a thickness of 7 cm after compacting . A test piece without reinforcement was compared with a test piece with a reinforcement made of a polyester multifilament fabric with a mesh size of 10 χ IQ mm and with a test piece with a reinforcement which had been treated according to the example given above. When a reinforcement was applied, a layer of the. AsDhalt mixture in a form in the earning device at a temperature of 140 ¹ ^ C compacted to a thickness of 2.8 cm, whereupon the fabric material was applied to the asphalt layer at about 30 C and whereupon an upper layer! was cast onto the fabric material at 140 ⁰ C and is also compressed diefee layer, namely cm to a thickness of 4.2. Twenty-four hours later, the test pieces "which had been kept in water for the last 2 hours" were examined for flexural strength in a Marshall press with an electronic writing device, the press being adapted for the purpose

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Points supported that were 24.5 cm apart. The piece became like this between the two support points loaded that the bending speed in mm / minute constant was.

The maximum load force required for this was measured. The tensile strength is determined by the formula:

1/4 PL

1/6 hour ²

k P = maximum measured load, I »= distance between the support points, B = width of the test piece, h = height of the test piece,

Furthermore, the deflection was measured at the moment when the piece breaks (then the load has dropped to essentially zero ).

The following results were obtained in the investigations:

a) For the asphalt piece * without reinforcement, flexural strength:

2
4.9 kg / cm; maximum deflection: 6.5 mm,

b) for a piece with a reinforcement without the binder: k flexural strength: 4.8 kg / cm; maximum deflection: 5.9 mm,

c) for the piece with a reinforcement with a reinforcement according to the invention Binder was impregnated using a bitumen with a penetration value of 80

was made: flexural strength: 6.2 kg / cm; maximum deflection · 'more than 22 mm.

d) for a piece with a reinforcement that has a reinforcement according to the invention Binder was impregnated that produced

• was made using a bitumen with a permeable

2 strength value of 180: flexural strength: 5.5 kg / cm; maximum Deflection: more than 22 mm.

009840/1482

From this it can be seen that when a binder according to the invention is used, the reinforced asphalt is much stronger and is more elastic than using a reinforcement without applying this binder.

A good measure of the degree of adhesion of the asphalt to the Reinforcement material is He.

This size is determined as follows:

In the stress test, the test piece is stressed so that a constant deflection of 2 mm per minute occurs. The loading pressure is measured for every minute. The product the sum of the stresses and the duration of the load until the piece breaks is a measure of the energy that is transferred to the piece of asphalt must be dispensed for it to break, and this product is reported as He.

For the pieces examined above, the following values were obtained for he received:

Asphalt piece without reinforcement 30.4

Asphalt piece with reinforcement, but not

impregnated with binder 60.5

Asphalt piece with reinforcing, treated with • a binder was prepared using a bitumen having a D value of _u rchdrinqungs 80,619

Piece of asphalt with reinforcement that has been impregnated with the binder that has been made was named under "firv.'endtsnc! by ^! tunnii! ü'ifc t * ii! *: ··! Durchdrinounas value of 180 520.

The great effectiveness of the use of a binder according to the invention in reinforcement for asphalt layers is can be seen from the above.

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Claims (8)

2013Λ76 claims 1.) Reinforcement material based on synthetic textile material , characterized in that the synthetic Tp-xt j lna + - ^ ri al with ^ ιγ ° γ mix ans see a grnmi ti Kohl pnv / fiprp'-Ri; -of fharz and Bi j -jmen jmpräaniert. 2.) reinforcement material according to claim 1, characterized in that that the bitumen and the Roman resin in one vessel weight ratio of at least 1:12 are available. 3.) Process for the preparation of a binder that is used to make a. Reinforcement material according to the claims 1 or 2 to produce, characterized in that an aromatic Carbon resin with bitumen: \ n an organic one solvent is dispersed using an emulsifier. 4.) The method according to claim 3, characterized in that an aromatic hydrocarbon resin is used with an aromatic content of over 90% and a naphthene content of less than 5%, the molecules of the aromatic constituents f containing ring systems, which on average 3 to 4 condensed hinge include, the ring systems a few - "short aliphatic side chains t ^ agen. 5.) Method qemäß claims 3 or 4, characterized in that that a nonionic emulsifier is used. 6.) Process according to claims 3, 4 or 5, characterized in that that ethyl acetate is used as a solvent .tel will. • AD ORIGINAL 0098A0 / H82 7.) Method according to one of claims 3 to 5, characterized in that that a mixture is prepared consisting of 10 to 60% by weight of aromatic hydrocarbon resin and more than 30% by weight organic solvent and at least 5% bitumen and at least 1% emulsifier contains. 8.) Method according to one of claims 3 to 6, characterized in that that the resin and the bitumen are melted together, after which the organic solvent and then the emulsifier is added and the whole is allowed to cool while stirring vigorously. SAD ORIGINAL 009840/1482 ^;