Composite fiber emulsified asphalt mixture and preparation method thereof

A technology for emulsified asphalt and composite fibers, which is applied in the field of preparation of asphalt mixtures, can solve the problems of non-volatile, insufficient strength, and many bifurcations, and achieves the effects of improving fatigue resistance, high temperature performance, and many bifurcations.

Inactive Publication Date: 2020-11-27
郑州市路通公路建设有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to overcome the problem that the early moisture of the emulsified asphalt is not easy to volatilize and the early strength is not enough, the inventor uses the hollow fiber capillary phenomenon, uses the fiber as a stabilizer, and uses the hollow organic fiber not to be corroded by common acid-base solvents, with many branches and easy to disperse , can significantly improve the high temperature performance of the mixture, and prevent the advantages of asphalt leakage

Method used

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  • Composite fiber emulsified asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4 and comparative example 1

[0036] The percentages of various substances involved in the examples refer to mass percentages unless otherwise specified.

[0037] The determination of void ratio is calculated according to the formula described in "Test Regulations for Asphalt Asphalt Mixtures in Highway Engineering" JTG E20-2011" (T0705-4).

[0038] The determination of dynamic stability is tested according to the test standard of "Test Regulations for Asphalt Asphalt Mixtures in Highway Engineering" JTG E20-2011 (T0719-2011).

[0039] The determination of the freeze-thaw splitting strength ratio is carried out in accordance with the test standard JTG E20-2011 (T0729-2000) of "Test Regulations for Bituminous Asphalt Mixtures in Highway Engineering".

[0040] The compressive strength is tested by a computer-controlled electronic universal testing machine model CMT5305 at a loading speed of 50mm / min±5mm / min.

[0041] The composite fiber emulsified asphalt mixture of embodiment 1-4 adopts the following steps...

Embodiment 1

[0056] The preparation method of the composite fiber emulsified asphalt mixture of the present embodiment comprises the following steps:

[0057] Step S1: Weigh 5kg of aggregates according to the proportioning ratio. The gradation of the aggregates is selected as follows: aggregates with a particle size of 0-3 mm account for 16% of the total mass of the aggregate, and aggregates with a particle size of 5-10 mm account for 16% of the total mass of the aggregate. The mass percentage of the total mass of the aggregate is 36%, the mass percentage of the aggregate with a particle size of 10-15mm is 38%; the mass percentage of the mineral powder is 7.75% of the total mass of the aggregate, Pour 2.25% of the total mass of calcium hydroxide into the asphalt mixer, start the machine, and mix the aggregate with calcium oxide for 90 seconds;

[0058] Step S2: Then add 60g of water, start the machine, and stir evenly;

[0059] Step S3: Weigh 320g of emulsified asphalt and 14.6g of curing...

Embodiment 2

[0062] The preparation method of the composite fiber emulsified asphalt mixture of the present embodiment comprises the following steps:

[0063] Step S1: Weigh 5kg of aggregates according to the proportioning ratio. The gradation of the aggregates is selected as follows: aggregates with a particle size of 0-3mm account for 15% of the total mass of the aggregate, and aggregates with a particle size of 5-10mm account for 15% of the total mass of the aggregate. The mass percentage of the total mass of the aggregate is 40%, the mass percentage of the aggregate with a particle size of 10-15mm accounts for 35% of the total mass of the aggregate, the mass percentage of mineral powder accounts for the total mass of the aggregate is 7.5%. Pour 2.5% of the total mass of calcium hydroxide into the asphalt mixer, start the machine, and mix the aggregate with calcium oxide for 90 seconds;

[0064] Step S2: Then add 70g of water, start the machine, and mix well;

[0065] Step S3: Weigh 34...

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Abstract

The invention discloses a composite fiber emulsified asphalt mixture. The composite fiber emulsified asphalt mixture comprises emulsified asphalt, aggregate, a curing agent, calcium hydroxide and fibers, wherein the emulsified asphalt accounts for 6-8% of the aggregate in percentage by mass; wherein the content of calcium hydroxide is 2-3% of the mass of the aggregate; the mineral powder accountsfor 6.5-8.5% of the mass of the aggregate; the curing agent accounts for 3-5% of the mass of the emulsified asphalt; and the fiber accounts for 0.2-0.3% of the mass of the aggregate. In addition, theinvention further discloses a preparation method of the composite fiber emulsified asphalt mixture. The composite fiber emulsified asphalt mixture is high in shear resistance, cracks and track diseases of an asphalt pavement can be reduced, the capillary phenomenon of fibers is adopted, moisture on the surface and inside the mixture can be rapidly volatilized, and the early strength of the mixtureis improved.

Description

technical field [0001] The invention relates to an asphalt mixture and a preparation method thereof, in particular to the preparation of an asphalt mixture with strong anti-rutting ability, remarkable high-temperature performance, easy volatilization of early water, high early pavement strength, environmental protection and water permeability . Background technique [0002] With the development of the transportation industry, heavy loads and overloads have increased sharply, and road cracks and rutting problems have emerged one after another, which puts forward higher requirements for the shear performance of asphalt pavement. In order to delay the occurrence of cracks, rutting and other diseases on the asphalt pavement, and prolong the service life of the asphalt pavement. Epoxy resin can significantly increase the strength of asphalt, thereby improving the rutting resistance of the mixture. [0003] Since now, in the production of asphalt mixture, hot mix asphalt mixture...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10C04B16/06C04B14/38C04B26/26
CPCC04B28/10C04B16/0683C04B16/0633C04B14/386C04B26/26C04B2201/50C04B24/36C04B14/28C04B14/14C04B14/005C04B24/121C04B22/002C04B22/064
Inventor 郭孟涛李子云李运富马国强张宏伟严云飞李虎马博吴迪马志峰赵悠悠蒋云鹏张乔熊坤班中阳
Owner 郑州市路通公路建设有限公司
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