High-performance cold patch asphalt mixture and preparation method thereof

A technology for cold patching asphalt and mixtures, which is applied to building thermal insulation materials, building components, buildings, etc., can solve the problems of shortening service life, poor early strength and low strength of cold patching asphalt mixtures, and achieves low mass loss rate, Good low temperature cracking resistance, not easy to loosen

Active Publication Date: 2022-01-07
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the characteristics of cold-patch asphalt mixture, after pothole repair, the strength of the mixture gradually increases with the volatilization of the diluent, and the strength formation process is a slow process. At the same time, due to the dilution of the asphalt, it will cause The early strength of the mixture is poor
Under the action of traffic load, the strength of early cold-patch asphalt mixture is not high, and it is easy to be damaged again, which shortens its service life

Method used

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  • High-performance cold patch asphalt mixture and preparation method thereof
  • High-performance cold patch asphalt mixture and preparation method thereof
  • High-performance cold patch asphalt mixture and preparation method thereof

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preparation example Construction

[0064] Such as figure 1 Shown, the present invention also provides a kind of preparation method of high-performance cold patch asphalt mixture, comprises the following steps:

[0065] Step S1, selecting and weighing aggregates, mineral powder, and cold-patched asphalt liquid with different particle sizes according to the mass parts, from 100 parts of aggregate, 2.5-3.5 parts of mineral powder, and 4.5-5.5 parts of cold-patched asphalt liquid;

[0066] Step S2, put the weighed aggregate and mineral powder in an oven at 85°C for 3-4 hours; put the weighed cold asphalt liquid in an oven at 70°C for 1 hour; keep the mixing pot at 80°C ℃; aggregate and mineral powder heat preservation is to dry the water in them, and cold-patch asphalt liquid heat preservation is to keep it in a flowing state for easy mixing; aggregate and mineral powder are solid, and the temperature rises slowly, so as to fully dry the water and make it It is heated evenly, with a high temperature and a long tim...

Embodiment 1

[0078] Step S1, weighing aggregates, mineral powder, and cold patched asphalt liquid according to the mass parts as 100 parts of aggregate, 3 parts of mineral powder, and 5 parts of cold patched asphalt liquid;

[0079] Step S2, put the weighed aggregate and mineral powder in an oven at 85°C for 3-4 hours; put the weighed cold asphalt liquid in an oven at 70°C for 1 hour; keep the mixing pot at 80°C ℃;

[0080] Step S3, first add the heat-preserved aggregate into the heat-preserved mixing pot, and stir for 90 seconds; then add the heat-preserved cold patching asphalt liquid into the stirring pot, and stir for 90 seconds; finally, add the heat-preserved mineral powder into the stirring pot, Stir for 90s to obtain the cold-patch asphalt mixture;

[0081] Step S4, bagging and sealing the cold-patch asphalt mixture prepared in step S3 for storage.

[0082] Wherein the preparation method of the cold asphalt liquid is as follows:

[0083] Step S11, select and weigh the coumarone ...

Embodiment 2

[0088] On the basis of Example 1, the components of the cold-patched asphalt mixture are adjusted to be composed of 100 parts of aggregate, 2.5 parts of mineral powder, and 5 parts of cold-patched asphalt liquid in parts by mass; the components of cold-patched asphalt liquid are adjusted to The mass ratio of asphalt, diluent and additive is 100:22:7; other parameters remain unchanged to prepare cold patch asphalt liquid and cold patch asphalt mixture.

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Abstract

The invention provides a high-performance cold patch asphalt mixture and a preparation method thereof. The high-performance cold patch asphalt mixture is prepared from the following components in parts by mass: 100 parts of aggregate, 2.5-3.5 parts of mineral powder and 4.5-5.5 parts of a cold patch asphalt liquid. The preparation method comprises the following steps: preparing an additive from a coumarone resin, a terpene resin and an ethylene-vinyl acetate copolymer according to a formula; selecting matrix asphalt, a diluent and the additive according to a mass ratio of 100: (22-25): (6-8), heating the matrix asphalt, adding the diluent, dispersing under a high-speed dispersion instrument, cooling, adding the additive, and dispersing to obtain a cold patch asphalt liquid; and selecting and weighing aggregate, mineral powder and the cold patch asphalt liquid according to the mass parts, carrying out heat preservation development at different temperatures respectively, putting into a mixing pot, and mixing to obtain the cold patch asphalt mixture. According to the high-performance cold patch asphalt mixture provided by the invention, the storage stability, the construction workability, the Marshall stability, the water stability and the adhesive property of the cold patch asphalt mixture can be remarkably improved, and the purpose of prolonging the service life of the cold patch asphalt mixture is achieved.

Description

technical field [0001] The invention belongs to the technical field of road maintenance materials, in particular to a high-performance cold patch asphalt mixture and a preparation method thereof. Background technique [0002] There are mainly two types of pavement in my country: asphalt pavement and cement concrete pavement. Compared with the two, asphalt pavement has more advantages. Mechanical properties and durability, widely used in road construction. However, under the repeated action of the environment and vehicle loads, the asphalt pavement will loosen and peel off the surface material, which is prone to threshing, pockmarks and other diseases. After continuous impact and rolling by driving vehicles, the damaged surface will gradually increase. Large pits appear. Pothole disease will reduce the performance of the road surface, causing problems such as driving bumps and slowing down of vehicle speed, affecting driving safety and road appearance. If not treated in time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C08L95/00C08L45/02C08L45/00C08L23/08C04B111/72
CPCC04B26/26C08L95/00C04B2201/10C04B2111/0075C04B2111/72C04B14/14C04B14/28C08L45/02C08L45/00C08L23/0853
Inventor 韦慧张虎李崛张宇豪
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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