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A kind of preparation method of high-strength cold paved asphalt mixture

A technology of cold-laying asphalt and mixture, which is applied to building insulation materials, building components, buildings, etc., which can solve the problems of slow strength formation rate, complicated preparation process, and low strength, and improve the early strength formation speed and road performance. Excellent, high molding strength effect

Active Publication Date: 2017-10-13
BEIJING MUNICIPAL ENG RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a method for preparing high-strength cold-paved asphalt mixture, which solves the technical problems of low strength and slow strength formation rate of the existing cold-paved asphalt mixture at room temperature; and solves the current problems of complicated preparation process and high cost

Method used

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  • A kind of preparation method of high-strength cold paved asphalt mixture
  • A kind of preparation method of high-strength cold paved asphalt mixture
  • A kind of preparation method of high-strength cold paved asphalt mixture

Examples

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Effect test

specific Embodiment

[0027] Specific Examples The preparation method of room temperature modified asphalt is:

[0028] Step 1: Heat Shell A-grade 70# asphalt to 130 ℃, stir at 500 r / min, and add reactive diluent at the same time, stir for 15-30 minutes until the asphalt is evenly mixed with it;

[0029] Step 2: Add the asphalt flame retardant and modifier to the mixed solution prepared in Step 1 at 100°C according to the ratio, stir and shear at a speed of 3000 r / min to a uniform state without particles, and continue stirring for 10 ~20min;

[0030] Step 3: Add the diluent to the mixed solution prepared in Step 2 at 90°C, stir at a speed of 1000r / min to a uniform state, continue stirring for 10-20 minutes, and store in a sealed container.

[0031] Specific Examples The preparation method of room temperature modified asphalt mixture is:

[0032] Step 1: Pour the aggregate and room temperature modified asphalt into the mixing pot to spread the room temperature modified asphalt evenly on the surface of the ag...

Embodiment 1

[0040] The room temperature modified asphalt is composed of the following raw materials by weight:

[0041]

[0042] In this embodiment, the reactive diluent is plant polyol, the diluent is n-heptane, the flame retardant is DS-ZR asphalt flame retardant, and the modifier is styrene-butadiene-styrene block copolymer . In this example and the following examples, the petroleum pitch is Shell A grade 70# pitch.

[0043] The test results of various indexes of the normal temperature modified asphalt prepared in Example 1 are as follows.

[0044]

[0045] The proportions of the raw material components of the room temperature modified asphalt mixture in parts by weight are as follows:

[0046] 4.7 parts of room temperature modified asphalt;

[0047] 94.5 parts of aggregate and mineral powder;

[0048] Highly active direct throw strength adjustment additive 0.8 parts.

[0049] The ratio of the room temperature modified asphalt and the strength adjustment additive is determined so that the number...

Embodiment 2

[0055] The room temperature modified asphalt is composed of the following raw materials by weight:

[0056]

[0057] In this embodiment, the reactive diluent is 1,2-butanediol, the diluent is tetrahydrofuran, the flame retardant is DS-ZR asphalt flame retardant, and the modifier is styrene butadiene rubber.

[0058] The test results of various indexes of the normal temperature modified asphalt prepared in Example 2 are as follows.

[0059]

[0060] The proportions of the raw material components of the room temperature modified asphalt mixture in parts by weight are as follows:

[0061] 4.8 parts of room temperature modified asphalt;

[0062] 94.5 parts of aggregate and mineral powder;

[0063] Highly active direct throw type strength adjusting additive 0.7 parts.

[0064] The performance of the mixture formed by mixing the liquid asphalt prepared according to Example 2 and AC-13 type aggregate (according to the above-mentioned weight ratio) is as follows.

[0065]

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Abstract

The invention relates to normal-temperature-modified asphalt for a high-strength cold-laid asphalt mixture and a preparation method of normal-temperature-modified asphalt. The normal-temperature-modified asphalt for the high-strength cold-laid asphalt mixture comprises the following components in parts by weight: 58-64 parts of petroleum asphalt, 21-30 parts of a reactive diluent, 11-14 parts of a diluents, 0.01-1 part of a flame retardant and 0.01-1 part of a modifier. The normal-temperature-modified asphalt is small in viscosity at normal temperature and has good construction workability; the softening point of the normal-temperature-modified asphalt is higher than that of ordinary petroleum asphalt and the normal-temperature-modified asphalt has the advantages of large elastic recovery rate, short surface drying time, high curing-molding rate and strong coating force with an aggregate. The cold-laid asphalt mixture prepared from the normal-temperature-modified asphalt has the advantages of high early strength forming speed after paving, high molding strength and short open transportation time compared to the conventional cold-mixing asphalt mixture and meanwhile, the high temperature performance, water stability and the low-temperature performance can reach the technical requirements of the hot-mixing asphalt mixture and the preparation method is simple, economic, environmentally friendly and energy-saving.

Description

Technical field [0001] The invention relates to a room-temperature modified asphalt, a preparation method of the room-temperature modified asphalt, and a method for preparing a cold-laid asphalt mixture by using the room-temperature modified asphalt. Background technique [0002] As of the end of 2013, the total mileage of my country's highway network reached 3.984 million kilometers, with an increase of 639,000 kilometers in five years. Among them, the expressway added 33,000 km, ranking second in the world. Almost all highways that have been built are asphalt concrete pavements. Asphalt pavement has many advantages such as excellent road performance, comfortable driving, low driving noise, convenient maintenance, fast construction speed, and low dust pollution. It has become the main form of roads and urban roads in my country. [0003] Nowadays, the asphalt pavement in road construction mainly uses hot-mix asphalt mixture, but the hot-mix asphalt mixture has high construction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08L9/06C08K5/3492C08K3/32C04B26/26
Inventor 文龙张汎胡芃李凯王晓江孙文龙王贯明李佩夏春蕾崔丽杨秀峰周立成傅鑫姜伟
Owner BEIJING MUNICIPAL ENG RES INST
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