DD213678A1 - BITUMINOESES MIXTURE FOR STREETS - Google Patents

Abstract

The invention relates to a bituminoeses mix for Straßenbelaege, which is used in admixture with aggregates for the execution of bituminous construction layers and for the maintenance, care and maintenance of bituminous cover layers. The bituminous mix is based on deasphalting residues from the propane deasphalting of heavy petroleum products and contains, according to the invention, 1.5 to 12.0 mass% bleacher debris from the adsorptive refining of mineral oils and / or from the adsorptive refining of vegetable fats and oils , 2.5 to 9Ma .-% deasphalting residues from the propane deasphalting of heavy petroleum products and 79 to 96Ma .-% aggregates.

Description

Bituminous mix for road surfaces

Field of application of the invention

The invention relates to a bituminous mixture for road surfaces, which can be used in a mixture with other aggregates for the execution of bituminous construction layers and in the context of the maintenance, care and maintenance of bituminous surface layers.

Characteristic of the known technical solutions

It is known that bituminous mix for the production, maintenance and care of aggregates based aggregates on the basis of stone chips of different grain sizes, rock flour in particle sizes <· 0.09 mm, which act as filler, and a bituminous binder is constructed. In order to obtain a road surface according to the requirements of road construction, a number of quality requirements must be placed on the bituminous binder, the u. a · a relatively wide range of plasticity determined by the softening and breaking point, a corresponding ductility characterized by penetration, and a sufficiently high ductility. These requirements are met primarily by distillation residues from petroleum vacuum distillation, which are used as road construction bitumen (distillation bitumen). It is also known that by blowing of. Soil petroleum distillation residues with air are recovered such suitable bituminous binders. Furthermore are

Mixtures of these can be used as binders. Not suitable are extraction residues from the propane deasphalting of heavy petroleum products, since these products have too high brittleness due to the lack of oil. Improving poor processability, a road surfacing material that provides for the exclusive use of deasphalting residues as a bituminous binder would have as a further disadvantage completely inadequate low temperature performance and extremely low splitting tensile, transverse, flexural and flexural properties.

Another crucial factor in the use of such deasphalting residues as a binder in bituminous mix for road surfaces is that at the same time by art processes related, oil-containing products, such as petroleum distillates or soft Erdöldestillationsrückstände must be supplied, which are thus no longer available for a higher refinement. At the same time, the amount of petroleum and tar products needed to produce bituminous road surface mix is limited from an economic point of view, so that extremely stringent criteria and limitations apply to the bituminous road construction. and in the maintenance and repair of traffic areas.

Object of the invention

The aim of the invention is a bituminous mix for road surfaces, which eliminates the disadvantages of the prior art and with the economically important Erdöldestillationsrückstände, petroleum distillates, tar products from the Steinbzw. Brown coal tar processing and Haturasphalte can be substituted. The bituminous mixture, which is mixed with other aggregates for the construction of bituminous construction layers and for the maintenance, servicing and maintenance of bituminous layers.

should be reversible, measure while possessing all the advantageous quality properties of a Straßenbelagatsrials. They should be built using secondary raw materials while eliminating the environmental impact of pollutants due to the no longer required deposition of these used secondary raw materials in landfills.

Explanation of the essence of the invention

The invention is based on the object, a bituminous mix on the basis of deasphalting residues from the propane deasphalting of heavy petroleum products using material unused substances.

According to the invention the object is achieved by a combination 2 ₉ 5 to 9 »0 Ma .- # Deasphalting residue from the propane deasphalting of heavy petroleum products, 1.5 to 12.0 Ma .- # bleach residues from the adsorptive refining of mineral oils and / or from Adsorptive refining of vegetable fats and oils and 79 to 96 Ma. -% aggregates dissolved.

It has surprisingly been found that the combination of aggregates in the form of rock chip and rock dust with deasphalting residues from the propane deasphalting yields a suitable bituminous mixture for road surfaces when this mixture according to the invention bleach residues from the adsorptive refining of mineral oils and / or vegetable fats and oils adds.

According to a further feature of the invention, the same effect is achieved when the proposed mixture still contains up to 5% fat and / or Altvaseline and or or higher molecular weight chlorinated paraffin and / or a boiling above 300 ⁰ C mineral oil component.

Aasführungsbeispiele:

1. In a twin wave agitated mixer, 18.7 Ma. - crushing grit of 0-2 mm grain size, 46.8 ha .-- stone chip 2-8 mm, 18.7 Ma · - Hatorsand 0-2 mm and 7.7 Ma.-JS limestone meal at a temperature of 185 ⁰ C submitted. 4.9% by mass of propane bitumen and 3.2% by mass are mixed with this rock mixture. -% bleach residue from the adsorptive refining of mineral oils added with constant stirring. The stirring process is continued until the rock is completely enveloped. The hot mix with the characteristics

Density / 3 G 2.287 g / cm ³

Void content 4.6 %

Water absorption 1.4% by volume

^ Marshall Stability 10.2

47mm * 10

Stiffness 2.02 kN / mm

Splitting tensile strength 1.3 IT / mm

Transverse tensile deformation 0.32 mm

dynamic stamp impression - 2.1 mm deep

(at 60 G, after 60 min.)

suitable for the execution of bituminous construction layers up to class 4 and for the production of bituminous mixtures in the context of maintenance uxn care of bituminous surface layers.

2 · In a motor cooker, 8.0 Ma * - # extraction bitumen, 32.0 Ma .- $ rock chip of grain size 2-8 mm, 30.0 Ma .-% Hura sand 0-2 mm, 12.6 Ma. -% crushing sand 0-2 mm and 12.0 Ma. -% limestone powder submitted. At a temperature of 200 ⁰ G • 2.7 Ma. -% bleach residue from the adsorptive refining of mineral oils and vegetable pills and oils added and the mixture for 60 min. touched. The binder-rock mixture has the following characteristics:

Density / 3 5 2.344 g / cm ³

Static impression depth 3, S mm

(40 ° 0, 52.5 kp load, 30 min test time)

Compressive strength 8.2 H / mm ²

Tensile strength b. 0 ⁰ C 12.2 N / mm ²

^ o

Deflection b. 0 C 0 ^ 54 mm

Bending tensile strength b. -15 ⁰ C 13.9 U / mm ² deflection b. -15 ⁰ C 0.24 mm

The hot mix is suitable for the production of poured asphalt for bridge coverings.

A mixture of 35.0 Ma ..- # rock chips of grain size 2-8 mm, 29.4 Ma .- # crushing sand 2-8 mm, 20.5 Ma .- $ 6 0 0 mm sand, 0 7 0 Ma. - # Limestone meal and 4.9 Ma. -% propane bitumen at 180 ⁰ C with continuous stirring 3.2 Ma added .-% of a bleaching earth residue from the adsorptive refining vegetable fats and oils, laughing of the complete wrapping of the rock, the hot mix following characteristic values:

Density / 3 G 2.364 g / cm ³

Void content 3.1 %

Water absorption 0.8 VoI · -%

Marshall Stability 8,6

Flow value 37 mm _β 10 ~ ¹

Stiffness 2.3 kH / mm

Split tensile strength 2.4 N / mm ²

Transverse tensile deformation 0.38 mm

dynamic stamp impression - 2.4 mm deep

(at 60 C, after 60 min.)

The hot mix is suitable for the extraction of bituminous cover and bonding layers up to the stress class and for the production of bituminous mixtures in the context of the maintenance and care of bituminous surface layers.

In an engine cooker, 8.0 Ma _e % asphalt deasphalting residue from the propane deasphalting, 36.0 Ma. -fa Rock chip of grain size 2-8 mm, 27,0 Ma «-% natural sand 0-2 min, 12,6 Ma, -% crushing sand 0-2 mm and 11,8 Ma. -% limestone powder submitted. At a temperature of 210 ^° C., 1.8% by mass of a bleach residue from the adsorptive refining of vegetable fats and oils, ie 1.2% by mass of a rolling fat, is added and the mixture is stirred for 60 min. touched. The binder-rock mixture has the following characteristics:

Density / 3 G 2.295 g / cm ³

Static impression depth 4.3

Compressive strength 6.7 H / mm ²

Bending tensile strength b. 0 ⁰ C 10.8 U / mm ² deflection b. 0 ⁰ O 0.42 mm

Bending tensile strength b. -15 ⁰ G 11.7 U / mm ² deflection b. -15 ⁰ C 0.18 mm

The mix is suitable for the production of poured asphalt for road surfaces ♦

Claims (2)

invention claim Bituminous mix for the manufacture, repair, maintenance and servicing of bituminous binders and aggregates based on road surfaces, characterized by 1.5 to 12.0 Ma .- # bleaching earth residues from the adsorptive refining of mineral oils and / or from Adsorptive refining of vegetable fats and oils, 2.5 to 9% by weight of deasphalting residues from the propane deasphalting of heavy petroleum products and 79 to 96% by weight of aggregates. 2. A bituminous paving mix according to item 1, characterized by an addition of up to 5 mA · -JS used grease, and or or higher molecular weight chlorinated paraffin and or · or 300 ⁰ C boiling petroleum component.