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Temporary oil adding device applicable to hard asphalt mixture and construction method of temporary oil adding device

A technology of adding devices and hard asphalt, which is applied in the direction of roads, road repairs, roads, etc., can solve problems such as easy loosening, lower road service level, and molding effects that do not meet the requirements, and achieve the effect of improving crack resistance

Active Publication Date: 2019-01-04
吉林建筑科技学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the asphalt has hardened before the asphalt mixture is fully compacted, the compaction and shaping of the asphalt will be greatly reduced
[0004] Engineering experience in recent years has also fully proved this point. Although hard asphalt can significantly reduce technical problems such as rutting of asphalt pavement in southern high-temperature areas, compaction is common in the process of paving and rolling asphalt mixture. The degree does not meet the requirements, and the molding effect does not meet the requirements
Due to the early hardening of asphalt, there are significant technical defects in both compaction and molding, resulting in some engineering defects of low strength and easy loosening of hard asphalt mixture during service, which reduces the service level of the road and restricts the hard asphalt mixture. Rational application of high-quality asphalt mixture in hot southern regions

Method used

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  • Temporary oil adding device applicable to hard asphalt mixture and construction method of temporary oil adding device
  • Temporary oil adding device applicable to hard asphalt mixture and construction method of temporary oil adding device
  • Temporary oil adding device applicable to hard asphalt mixture and construction method of temporary oil adding device

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Experimental program
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Effect test

preparation example Construction

[0040] The preparation link of the temporary oil content adding device of the present invention is:

[0041] (1) Since the temperature of the hard asphalt mixture in the compaction and molding stages is about 150 degrees, in order to avoid the melting of the device under high temperature conditions, the hollow oil pipe 1 ( Plastic products made of PP or PET can be selected), and the length of the oil pipe 1 ranges from 0.5m to 5m (determined reasonably according to the paving width or road width during the project). The inner diameter of the oil pipe 1 ranges from 5 mm to 10 mm.

[0042](2) Make circular holes 3 with a diameter of 2-4 mm at intervals of 3-5 mm on the wall of the oil pipe 1 . Under the pressure of the road roller, the oil in the lumen of the oil pipe 1 can be sprayed out through the hole 3 and enter the pores of the hard asphalt mixture, thereby softening the asphalt, improving the working performance of the asphalt, and delaying the formation of the hard asph...

Embodiment 1

[0056] The length of the temporary oil addition device is 4.5m, the inner diameter is 7mm, the hole interval is 3mm, and the hole diameter is 2mm. The oil in the lumen is specifically diesel oil, the pipe wall material is PP plastic, and the surrounding soft plastic is UPVC material. . The interval between two temporary oil addition devices is 40cm. It is set at the middle depth of the lower layer of the road surface, and the thickness of the lower layer is 8cm. One-time paving width is 4.5m.

[0057] The construction condition is hard 30# asphalt mixture, the on-site paving temperature is 150°C, and the initial roller is 10 tons. Comparing the compactness and splitting strength of the asphalt pavement with this technology and the mixture without this technology, the following technical parameters are obtained

[0058] Table 1 Comparison of compaction splitting strength

[0059] Mixture category

Embodiment 2

[0061] The length of the temporary oil addition device is 3m, the inner diameter is 5mm, the hole interval is 5mm, and the hole diameter is 3mm. The oil in the tube cavity is divided into filtered waste oil. The material of the tube wall is PET plastic, and the surrounding soft plastic is UPVC. material. The interval between two temporary oil adding devices is 45cm. Set on the surface layer of the road surface, the thickness of the surface layer is 6cm, and the device is set at the middle depth of the surface layer. The one-time paving width is 6m, and two basic devices are installed within the paving width at the same time.

[0062] The construction condition is hard 50# asphalt mixture, the on-site paving temperature is 150°C, and the initial roller is 10 tons. Comparing the compactness and splitting strength of the asphalt pavement with this technology and the mixture without this technology, the following technical parameters are obtained

[0063] Table 2 Comparison of ...

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Abstract

The invention relates to a temporary oil adding device applicable to a hard asphalt mixture and a construction method of the temporary oil adding device. The temporary oil adding device comprises an oil pipe and an oil pipe film wrapped around the oil pipe; a plurality of holes are formed in the oil pipe; a pipe cavity of the oil pipe is filled with oil; the oil pipe film can be melted in a shorttime after being in contact with the hard asphalt mixture; and the oil in the pipe cavity of the oil pipe can be injected into pores of the hard asphalt mixture when a road roller performs a roller compaction process. With the adoption of the device provided by the invention, the oil injected into the pores of the asphalt mixture has an effect of temporarily softening asphalt, thereby facilitatingthe compaction and molding of the mixture. A plastic material stored inside the asphalt mixture acts as a cheap rebar and has a significant influence on improving the technical performances such as crack resistance and the like of the asphalt mixture.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a temporary oil addition device suitable for hard asphalt mixture and a construction method thereof. Background technique [0002] The existing engineering experience has fully proved that the application of low-grade hard asphalt in high-temperature areas is feasible, and the asphalt mixture prepared by using this kind of asphalt can significantly reduce the probability of high-temperature rutting of asphalt mixture in hot seasons. Negative temperature does not appear in winter in some areas in southern my country, so the low temperature disease of the mixture is not obvious. These objective external environmental factors have improved the application feasibility of hard asphalt. Hard asphalt is widely used in the lower layer and middle surface layer, and even in some projects on the surface layer, hard asphalt can also be used in order to obtain good high temperature s...

Claims

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Application Information

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IPC IPC(8): E01C19/10
CPCE01C19/1077
Inventor 李丹丹李健李彦雷
Owner 吉林建筑科技学院
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