Preparation method of asphalt concrete

A technology of asphalt concrete and modified asphalt, which is applied in the field of asphalt concrete, can solve the problems that the compressive capacity of asphalt concrete cannot be applied for a long time, the compressive strength of asphalt concrete is limited, and the compressive strength of asphalt concrete is optimized, so as to improve the efficiency of laying work, Reduce the number of repeated repairs and increase the effect of stress resistance

Active Publication Date: 2022-01-11
内蒙古高建路桥工程有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] Asphalt concrete, commonly known as asphalt concrete, is artificially selected mineral materials with a certain gradation, crushed stone or crushed gravel, stone chips or sand, mineral powder, etc., and a certain proportion of road asphalt materials, under strict control conditions The mixture made by mixing; the preparation of asphalt concrete needs to heat the asphalt, then mix it with materials such as mineral aggregates and sand and gravel, and then lay it on the damaged part of the road, and then flatten it with a road roller to complete the preparation; the asphalt pavement is compared with the cement pavement The advantage lies in the driving comfort and easy maintenance. Asphalt concrete is widely used on the road surface; engineering construction and transportation are inseparable from the road transportation of heavy trucks. In the process of time transportation and driving, great pressure will be exerted on the road surface, and the strength of the existing asphalt concrete pavement in the northern dry area is limited, which makes the asphalt pavement deformed after the pressure of heavy trucks, resulting in the phenomenon of potholes on the asphalt concrete pavement, resulting in Damage to asphalt concrete pavement
[0003] For example, a Chinese patent with the application number CN202011431276.7 discloses a preparation method of an asphalt concrete layer and modified asphalt. The asphalt concrete layer is laid on the treated cement road or old asphalt road. The asphalt The concrete layer comprises a bonding layer and an overlay, the bonding layer is laid on the cement pavement or the old asphalt pavement, and the overlay is laid on the bonding layer; this technical scheme does not apply to asphalt concrete The compressive strength of the asphalt concrete is optimized, so that the compressive strength of the asphalt concrete is limited, so that the compressive capacity of the asphalt concrete is not suitable for the rolling of existing heavy trucks for a long time. Afterwards, breakage will occur, which in turn causes the limitation of the scheme

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  • Preparation method of asphalt concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The asphalt concrete preparation method is as follows:

[0046] S1: Preparation: prepare 30 parts of 10mm coarse aggregate, 20 parts of 0.01mm fine sand, 10 parts of organic binder, 15 parts of zirconia powder, 5 parts of modified asphalt oil stone ratio of 7.5%, 0.5 part of mineral powder, minus 0.2 parts of water agent, 6 parts of steel slag and 0.4 parts of carbon black;

[0047] S2: Melting and stirring: the staff weighs 10mm coarse aggregate, 0.01mm fine sand and steel slag in sequence by weight, puts them into the mixer, stirs them evenly, and obtains material 1 as a spare; then the staff mixes the modified asphalt, oil stone ratio 7.5% and heated to 170°C to obtain the required melted modified asphalt, kept warm to 150°C, and set aside; at this time, the staff then added zirconia powder to material 1 and stirred and mixed evenly, and then added to the evenly mixed asphalt Add water reducing agent and carbon black to the material, stir well and set aside; finally...

Embodiment 2

[0053] The asphalt concrete preparation method is as follows:

[0054] S1: Preparation: Prepare 35 parts of 13mm coarse aggregate, 35 parts of 2.5mm fine sand, 20 parts of organic binder, 20 parts of zirconia powder, 7 parts of modified asphalt oil stone ratio, 0.6 part of mineral powder, 0.3 parts of water agent, 8 parts of steel slag and 0.6 parts of carbon black;

[0055] S2: Melting and stirring: the staff weighs 13mm coarse aggregate, 2.5mm fine sand and steel slag in sequence by weight, puts them into the mixer, stirs them evenly, and obtains material 1 as a spare; then the staff mixes the modified asphalt, asphalt 8% and heated to 175°C to obtain the required melted modified asphalt, kept warm to 155°C, and set aside; at this time, the staff then added zirconia powder to material 1 and stirred and mixed evenly, and then added to the evenly mixed asphalt Add water reducing agent and carbon black to the material, stir well and set aside; finally, the staff pours the melt...

Embodiment 3

[0061] The asphalt concrete preparation method is as follows:

[0062] S1: Preparation: Prepare 40 parts of 15mm coarse aggregate, 30 parts of 5mm fine sand, 30 parts of organic binder, 25 parts of zirconia powder, 8 parts of modified asphalt oil stone ratio, 0.7 part of mineral powder, water reducing 0.4 parts of agent, 10 parts of steel slag and 0.8 parts of carbon black;

[0063] S2: Melting and stirring: the staff weighs 15mm coarse aggregate, 3mm fine sand and steel slag in sequence by weight, puts them into the mixer, stirs them evenly, and obtains material 1 as a spare; 8.5% is heated to 180°C to obtain the required melted modified asphalt, which is kept warm to 160°C for standby; at this time, the staff adds zirconia powder to material 1 and mixes them evenly, and then pours them into the evenly mixed material Add water reducing agent and carbon black to the mixture, stir well and set aside; finally, the staff pours the melted modified asphalt into the well-stirred ma...

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Abstract

The invention relates to the technical field of asphalt concrete, in particular to an asphalt concrete preparation method which comprises the following steps: S1, preparing; S2, melting and stirring; S3, laying; and S4, pressing; wherein in the process of installing the bowl-shaped keels in the step S3, the bowl-shaped keels are connected through iron wires, and the iron wires are in sliding connection with the bowl-shaped keels; after the bowl-shaped keels are installed, the iron wire is pulled out; according to the preparation method of the asphalt concrete, the bowl-shaped keel is placed at the damaged part of the road, and the molten and stirred asphalt concrete pre-material is poured at the damaged part of the road for matching, so that the purpose of improving the pressure resistance of the asphalt concrete is achieved, and the asphalt concrete is prevented from being deformed after being pressed by a heavy truck. the condition that potholes occur on asphalt concrete pavement can be avoided, therefore, the service life of the asphalt concrete is prolonged, and the repeated repair frequency of the asphalt concrete is reduced.

Description

technical field [0001] The invention relates to the technical field of asphalt concrete, in particular to a method for preparing asphalt concrete. Background technique [0002] Asphalt concrete, commonly known as asphalt concrete, is artificially selected mineral materials with a certain gradation, crushed stone or crushed gravel, stone chips or sand, mineral powder, etc., and a certain proportion of road asphalt materials, under strict control conditions The mixture made by mixing; the preparation of asphalt concrete needs to heat the asphalt, then mix it with materials such as mineral aggregates and sand and gravel, and then lay it on the damaged part of the road, and then flatten it with a road roller to complete the preparation; the asphalt pavement is compared with the cement pavement The advantage lies in the driving comfort and easy maintenance. Asphalt concrete is widely used on the road surface; engineering construction and transportation are inseparable from the ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26E01C23/09E01C19/10C04B111/72
CPCC04B26/26E01C23/09E01C19/1013C04B2111/72C04B2111/0075C04B14/00C04B14/06C04B2103/0091C04B14/306C04B18/141C04B2103/302C04B18/142C04B14/022C04B32/02Y02W30/91
Inventor 魏仁高刘茂发唐克
Owner 内蒙古高建路桥工程有限公司
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