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Cold-mixed and cold-laid asphalt mixture, and cold-mixed and cold-laid asphalt mixture wearing layer

A technology of cold-laying asphalt and mixture, which is applied to coagulating pavement, buildings, roads and other directions paved on site. It can solve the problems of reflective crack disease and weak performance of pending-reflective cracks, so as to prolong the expected life and improve construction production efficiency. , the effect of saving carbon emissions

Active Publication Date: 2018-06-08
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional thin-layer structure overlay scheme has weak performance in dealing with reflective cracks, and it is very easy to have reflective cracks in a short period of time after the implementation of the scheme

Method used

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  • Cold-mixed and cold-laid asphalt mixture, and cold-mixed and cold-laid asphalt mixture wearing layer
  • Cold-mixed and cold-laid asphalt mixture, and cold-mixed and cold-laid asphalt mixture wearing layer
  • Cold-mixed and cold-laid asphalt mixture, and cold-mixed and cold-laid asphalt mixture wearing layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]A cold-mixed asphalt mixture comprising the following components in parts by mass:

[0045] 60 parts of diabase coarse aggregate,

[0046] 40 parts of diabase fine aggregate,

[0047] 12 parts of SBS modified emulsified asphalt,

[0048] 1 part cement,

[0049] 3 parts water,

[0050] 0 parts of water-based coupling agent.

[0051] Among them, Portland cement is used for cement, pure water is used for water, the mass content of SBS modifier in modified emulsified asphalt is not less than 4%, and no water-based coupling agent is added. The particle size of the aggregate is 0-9.5 mm, and the gradation adopts the GT-7 type in the special gradation of coarse aggregate and fine aggregate shown in Table 1. The results of the aggregate screening test are shown in Table 2:

[0052] Table 2 Coarse aggregate and fine aggregate screening test results

[0053]

[0054] The construction method steps of cold-mixed and cold-laid asphalt mixture wear course are as follows:

[...

Embodiment 2

[0057] A cold-mixed asphalt mixture comprising the following components in parts by mass:

[0058] Granite coarse aggregate 80 parts,

[0059] Granite fine aggregate 20 parts,

[0060] 15 parts of SBS modified emulsified asphalt,

[0061] Mineral powder 0.5 part,

[0062] 0.5 parts of water,

[0063] 3 parts of water-based coupling agent.

[0064] Among them, the coarse aggregate and fine aggregate are acidic granite aggregates, the mass content of SBS modifier in the modified emulsified asphalt is not less than 4%, water-based coupling agent is added, and the particle size of the aggregate is 0-9.5mm. The GT-7 type in the special gradation of coarse aggregate and fine aggregate as shown in Table 1 is adopted, and the results of the aggregate screening test are shown in Table 3:

[0065] Table 3 Coarse aggregate and fine aggregate screening test results

[0066]

[0067] The construction method steps of cold-mixed and cold-laid asphalt mixture wear course are as follo...

Embodiment 3

[0070] A cold-mixed asphalt mixture comprising the following components in parts by mass:

[0071] Granite coarse aggregate 50 parts,

[0072] Granite fine aggregate 50 parts,

[0073] 10 parts of SBS modified emulsified asphalt,

[0074] 3 parts of cement,

[0075] 5 parts of water,

[0076] 1 part of water-based coupling agent.

[0077] Among them, the coarse aggregate and fine aggregate are acidic granite aggregates, the mass content of SBS modifier in the modified emulsified asphalt is not less than 4%, the particle size of the acidic aggregate is 0-9.5mm, and the gradation is as shown in the table The GT-5 type in the special gradation of coarse aggregate and fine aggregate shown in 1, the aggregate screening test results are shown in Table 4:

[0078] Table 4 Coarse aggregate and fine aggregate screening test results

[0079]

[0080] The construction method steps of cold-mixed and cold-laid asphalt mixture wear course are as follows:

[0081] Add the designed ...

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Abstract

The invention provides a cold-mixed and cold-laid asphalt mixture, and a cold-mixed and cold-laid asphalt mixture wearing layer, and belongs to the technical field of road engineering. The cold-mixedand cold-laid asphalt mixture comprises coarse aggregates, fine aggregates, high-performance modified emulsified asphalt, a mineral filler, water and a liquid additive. The asphalt mixture prepared from above cold-mixed and cold-laid material components according to a special mineral grading range can be closely bonded to an old asphalt pavement and a cement pavement; and compared with traditionalmicro-surfacing and super-sticky wearing layer materials, the mixture has higher resistance to crack, water and skid and lower driving noises.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a cold-mixed and cold-paved asphalt mixture and a cold-mixed and cold-paved asphalt mixture wear course. Background technique [0002] At present, the number of highways in my country is close to 5 million kilometers, and the main construction work of highways has changed from new construction to maintenance, upgrading and transformation. In today's society, with the further development of the social economy, the demand for roads is not limited to the increase in durability. Driving safety and road environmental protection issues have become key factors for new roads. The state vigorously advocates the development of road construction and maintenance in the direction of "low carbon, energy saving, and environmental protection". In response to the national strategic development goal of "green transportation", it is an inevitable trend to innovate the existing asphalt we...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B28/04C04B28/00E01C7/35
CPCC04B26/26C04B28/00C04B28/04C04B2111/0075C04B2201/50E01C7/351E01C7/353C04B14/04C04B24/36C04B14/048C04B14/02C04B2103/0068
Inventor 虞将苗陈丽娟莫广亮陈富达苏国城卢健元
Owner SOUTH CHINA UNIV OF TECH
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