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Medium temperature asphalt mixture and process for preparing same

A kind of asphalt mixture, medium temperature technology, applied in the field of materials, can solve the problems of hot mix asphalt mixture development restrictions, etc., to achieve the effect of low aging degree of asphalt, prolong service life, and low mixing temperature

Inactive Publication Date: 2011-11-16
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the development of hot mix asphalt is limited

Method used

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  • Medium temperature asphalt mixture and process for preparing same
  • Medium temperature asphalt mixture and process for preparing same
  • Medium temperature asphalt mixture and process for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Taking 1000g of the aggregate used to prepare the medium-temperature asphalt mixture of the present invention as an example, the raw materials used and their mass ratios are as follows:

[0053] Aggregate 1000g

[0054] AH-70# Korean SK asphalt 46g

[0055] Liquid anti-stripping agent 0.138g

[0056] Slaked lime 20g

[0057] water 12g

[0058] The mass ratio of the above-mentioned aggregates is as follows:

[0059] Coarse aggregate 620g

[0060] Fine aggregate 300g

[0061] Mineral powder 80g

[0062] The penetration of above-mentioned asphalt is 60~80 when 100g at 25 ℃, 5 seconds; The model of liquid anti-stripping agent is AST-4, is sold by Xi'an Haiwei Chemical Technology Co., Ltd.; 16mm stone chips; fine aggregates are stone chips with a particle size of 0.075-2.36mm; mineral powder is a mineral powder with calcium carbonate as the main component and a particle size of less than 0.075mm obtained by grinding limestone.

[0063] Its preparation method is as foll...

Embodiment 2

[0085] Taking 1000g of the aggregate used to prepare the medium-temperature asphalt mixture of the present invention as an example, the raw materials used and their mass ratios are as follows:

[0086] Aggregate 1000g

[0087] AH-70# Korean SK asphalt 46g

[0088] Liquid anti-stripping agent 0.138g

[0089] Slaked lime 0g

[0090] water 12g

[0091] The above-mentioned aggregate ratio is as follows:

[0092] Coarse aggregate 620g

[0093] Fine aggregate 300g

[0094] Mineral powder 80g

[0095] The specifications of the used coarse aggregate, fine aggregate, mineral powder, and asphalt in this embodiment are the same as in Example 1, and the used liquid anti-stripping agent is the same as in Example 1.

[0096] Its preparation method is identical with embodiment 1. Prepare medium temperature asphalt mixture.

[0097] The prepared medium-temperature asphalt mixture has been subjected to immersion Marshall test and rutting test. The various test conditions are as follow...

Embodiment 3

[0108] Taking 1000g of the aggregate used to prepare the medium-temperature asphalt mixture of the present invention as an example, the raw materials used and their mass ratios are as follows:

[0109] Aggregate 1000g

[0110] AH-70# Korean SK asphalt 46g

[0111] Liquid anti-stripping agent 0g

[0112] Slaked lime 20g

[0113] water 12g

[0114] The above-mentioned aggregate ratio is as follows:

[0115] Coarse aggregate 620g

[0116] Fine aggregate 300g

[0117] Mineral powder 80g

[0118] The specifications of coarse aggregate, fine aggregate, mineral powder, and asphalt used in this embodiment are the same as in Example 1.

[0119] Its preparation method is identical with embodiment 1. Prepare medium temperature asphalt mixture.

[0120] The prepared medium-temperature asphalt mixture has been subjected to immersion Marshall test and rutting test. The various test conditions are as follows:

[0121] 1. Water immersion Marshall test

[0122] The prepared medium-t...

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Abstract

A medium temperature asphalt mixture and process for preparing same comprises the following raw materials: 100 parts by mass of aggregates, 3.6-5.6 parts by mass of asphalt, 0-0.0238 part by mass of liquid anti-stripping agents, 0-3 parts by mass of lime hydrate and 0.3-1.5 part by mass of water, wherein the aggregates comprise 59-71 parts of coarse aggregate, 20-35 parts of fine aggregate and 6-10 parts of mineral powder. The process for preparing the medium temperature asphalt mixture comprises the steps of aggregate screening, fine aggregate wetting, asphalt and coarse aggregate heating, preliminary stirring and restirring. Compared the medium temperature asphalt mixture with conventional hot-mixing mixtures, the process for preparing the medium temperature asphalt mixture is simple, the stirring temperature of the asphalt mixture is low, the paving and compacting are easy, the pollution on environment is small, the gradation of the prepared medium temperature asphalt mixture is excellent, the property thereof is equal to or better than the properties of the conventional hot-mixing mixtures, moreover, the aging degree of asphalt is low, and the life time of pavements is prolonged. The process for preparing the medium temperature asphalt mixture of the invention can be further used for preparing medium temperature asphalt mixtures with other mineral aggregate gradations.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a medium-temperature asphalt mixture. Background technique [0002] Hot mix asphalt mixture HMA (Hot Mix Asphalt) is widely used in road construction due to its excellent performance. However, the heating temperature of hot mix asphalt mixture for asphalt and mineral materials is high, the unit energy consumption is large, the asphalt aging is serious during the heating process, and a large amount of CO is emitted during the production and construction process. 2 , dust and other harmful substances, seriously affecting the surrounding environment and the health of construction workers; at the same time, the hot-mix asphalt mixture wears the mixing pot during the mixing process, reducing the service life of the equipment. The adverse effects of hot mix asphalt mixture include waste of energy, pollution of the environment and shrinking of the living circle of people,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B14/02C04B18/12
CPCY02W30/91
Inventor 裴建中高文阳刘靖邢向阳张久鹏常明丰
Owner CHANGAN UNIV