DD213679A1 - BITUMINOESES MIXTURE FOR STREETS - Google Patents

Abstract

The invention relates to a bituminous mix for the manufacture, repair, maintenance and care of Straßenbelaengen on the basis of waste products. It is based on road break-up material and according to the invention contains 70 to 99.8Ma .-% aged bituminous Aufbruchmaterialien and 0.1 to 20 Ma .-% bleacher residues from the absorptive refining of mineral oils and / or from the adsorptive refining of vegetable fats and oils and 0.1 to 10% by weight of furs with a particle size <equal to 0.09 mm.

Description

Bituminous mix for road surfaces

Field of application of the invention

The invention relates to a bituminous mix for the manufacture, repair, maintenance and care of road coverings based on waste products.

Characteristic of the known technical solutions

It is known to produce a bituminous mixture based on minerals of different particle sizes and road bitumen, cut bitumen, cold bitumen, bitumen emulsions or tars.

In the renovation of road surfaces, as a by-product, aged bituminous road-breaking material, which is usually discarded, is produced. In addition to economic losses, severe environmental pollution also occurs. A tilting or landfill of these waste materials is not responsible for reasons of global oil shortage. Therefore, there have been concrete and well-founded demands for a reuse of the aged bituminous roadbreaking material for some years.

Asphalt recovery processes have been proposed for regeneration of asphalt wastes used in maintenance and repair operations.

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In principle, a distinction is made between the following reuse methods that can be used:

1. The milling of old surface layers and the installation of the crushed material with the addition of bitumen emulsion or cement with sand on base courses or fastenings for subordinate traffic areas.

2. The breaking up or milling of the old road structure and its restoration by processing and incorporating the crushed material at the point of departure, with or without the addition of related aromatic oils.

3 · The breaking up or milling of old road construction layers and recycling of the crushed material into the production cycle of bituminous mixtures.

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As a binder, the break-up materials contain bitumen, which is embrittled by the action of air, light and water as well as mechanical stress. This embrittlement is also evident in the change in the ingredients of the bitumen. The hardening and embrittlement of the bitumen is caused by a decrease in the oils and an increase in the concentration of asphaltenes. For regeneration, related non-paraffinic high aromatics oils are used which exert a softening effect on the binder. The large-scale utilization of roadworking material is so far only in the production of mastic asphalt, with relatively small amounts are added when mixing the new Gußasphalts for reasons of quality reduction. Such mixtures are used only for repair work in the context of maintenance.

The reuse of the accruing bituminous demolition material presupposes that either-the material has not aged too much and the defects in the cracked surface layer are not due to insufficient bearing capacity of the construction or expensive blends available and not available in the required quantities Road bitumen, cut-backs bitumen, cold bitumen, bitumen emulsions, tars, other binders or aromatic substances

related, non-paraffinic oils must be used. Use of such expensive and unavailable regenerant does not sufficiently improve the economics of such materials.

Object of the invention

The aim of the invention is a bituminous mixture based on aged bituminous road-breaking materials and additives for the manufacture, repair, maintenance and care of road surfaces, which eliminates the disadvantages of the prior art and substituted the previously used for regeneration binders or aromatic oils can. This mix rope meet the quality requirements imposed on a bituminous road tree material. The mix should be constructed using secondary raw materials. In the process, secondary raw materials, which have hitherto only been used in an extremely low degree of handling and in a very special combustion furnace, are not used in terms of their energy and material. This should make it possible to replace the previously used for regeneration road construction bitumen and aromatic oils and to provide elsewhere for a more meaningful use.

At the same time to eliminate the environmental impact of the pollutants contained in these products by eliminating the no longer, compliant dump storage of bituminous road-breaking material and other waste products.

Explanation of the essence of the invention

The invention has for its object to develop a bituminous mix for the manufacture, repair, maintenance and care of road surfaces based on aged bituminous roadbreaking materials, such substances being used as a regenerating agent

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which are not yet used and sometimes discarded as waste products.

According to the invention by a combination of up to 99.3 Ma. -% aged, bituminous road-breaking materials, 0.1 to 20 Ha .- $ bleach residues from the adsorptive refining of vegetable fats and oils and 0.1 to 10 Ma .- $ fillers with a grain size ^ 0.09 cam dissolved.

It has surprisingly been found that an aged bituminous road-breaking material by Zumischong of completely alien substances, such as bleaching residues from the adsorptive en! Refining of vegetable fats and oils and fillers results in a bituminous mix, which is used for the manufacture, maintenance, servicing and care of road surfaces can be.

Sowing a further feature of the invention, the same effect is achieved when the mixture up to 6 Ε & • -% of a deasphalting ungsrückstandes from the propane deasphalting of heavy petroleum products and / or a boiling above 300 ⁰ C mineral oil component and / or used fat and or "Altvaseline and / or a high molecular weight chlorinated paraffin with a chain length distribution of C ₁₂ to Cp- and a chlorine content between 30 to 42 Ma, -% are added.

EXAMPLES

1. In a motor cooker 423 kg of a bleach residue from the adsorptive refining of mineral oils 4000 kg of an aged bituminous road-breaking material with a binder content of 8.2 Ma -% and 178 kg of limestone powder at a temperature of 210 ⁰ C are mixed until homogenization.

The following table shows the characteristics of the used aged bituminous road-breaking material and the resulting hot mix.

characteristic value

aged regenerated bit.A break-away material

Density / 3 G

static impression depth compressive strength

Bending tensile strength at ⁰ ° C

Deflection at ⁰ ° C

Bending tensile strength at -15 ⁰ C deflection at -15 ⁰ C

g / car 2,369 2,385 mm. 13.6 5.4 ΪΤ / mm ² 4.7 15.2 H / mm ² 10.7 13.2 mm 0.15 0.39 N / mm 12.1 13.7 mm, 0.14 0.22

The regenerated breaking material obtained is suitable for the production of poured asphalt for road surfaces.

2. A mixture of 7 kg of a bleach residue from the adsorptive refining of vegetable fats and oils, 1 kg of propane bitumen, 1 kg of a vacuum distillate resulting from vacuum distillation of petroleum bottoms with the characteristics

Initial boiling point density at 70 ⁰ C viscosity at 70 ⁰ C Flash point oT

380 ⁰ C 0.918 g / cm ^3, 170 cm ² / s 294 ⁰ C.

1 kg stacking fat, 1 kg Altvaseline, 1 kg of a previously no longer usable high molecular weight chlorinated paraffin with a chain length of CL. to CLg, a chlorine content of 35% by mass and the other characteristics

Density at 100 ^° C

Viscosity at

water content

pour point

Flash point

coking

Benzolunlösliches

1.018 g / cm ³

1 > 1 8th ο ⁰ E ⁰ C .- 0 * 9 5 96 VoI Ma. -2C » 1 C Ma. 8th 4 -% 0

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750 kg of an aged "bituminous Straßenaufbruchmateriala that has .-% over a Bindemitteigehalt of 6.2 Ma and 11 kg of limestone powder -is homogenized in a twin-shaft positive mixer at a temperature of 200 ⁰ C until uniform Yerteilung all components. Is The following table given a comparison of the characteristics of the aged bituminous road-breaking material and the regenerated road-breaking material.

characteristic value g / cnr aged Mt. • breakmat. Regenerated departure material Density / 3 G /O 2,285 2,291 void content VoI .-% 9.0 3.9 water uptake kil 4.7 1.3 Marshall stability mm * 10 5.4 8.75 flow value kH / mm 25 46 rigidity Έ / mm ² 2.2 1.9 splitting tensile strength mm 1.05 1.84 Querzugsverformung mm 0.1 0.28 dynamic stamp impression depth (at 60 C, after 60 min.) 4.9 2.0

The regenerated material is suitable for the execution of bituminous construction layers up to load class 3 ·

Claims (2)

Invented by san san rucb. Bituminous mix for the manufacture, repair, maintenance and servicing of road surfaces based on aged bituminous road break - up materials, characterized by 70 to 99.3 Ma - aged bituminous demolition materials and 0.1 to 20 Ma -% bleach residues adsorptive refining of mineral oils and / or from the adsorptive refining of vegetable pills and oils and 0.1 to 10 Ma .- # filler with a particle size = 0.09 mm. 2. Bituminous mix according to item 1, characterized by an addition of up to β Ma. -% of a Entasphaltierungsrückstandes from propane deasphalting of heavy petroleum products and or or about 300 ⁰ G-boiling petroleum component and or or waste grease and or or Altvaseline and or or a higher molecular weight chlorinated paraffin having a chain length distribution of C "to CPQ and a chlorine content from 30 to 42 Ma. SS.