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Environment-friendly warm mix asphalt mixture and preparation method thereof

A technology of asphalt mixture and warm asphalt, which is applied in the field of asphalt mixture, can solve the problems of asphalt mixture comprehensive performance impact, thermal aging, practical application inconvenience, etc., to improve the anti-aging performance and the ability to resist shear deformation , The effect of improving high temperature stability

Active Publication Date: 2020-08-07
SHANDONG HUITONG CONSTR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Today's asphalt mixture will undergo rapid thermal aging in a short period of time during the mixing process, which will have a great impact on the comprehensive performance of asphalt mixture and bring inconvenience to our practical application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] S1: Prepare materials;

[0046] S2: Preparation of Modified Warm Mixing Agent:

[0047] Take zeolite, dissolve it in sodium hydroxide solution, stir for 1 hour, filter, dry at 80°C, place in ethanol solution of octadecylamine, continue stirring for 30 minutes, and dry at 80°C to obtain modified zeolite;

[0048] Take the surfactant and the warm mix, mix and stir for 10 minutes at a stirring temperature of 120°C, then add a stabilizer, a viscosity reducer and an anti-aging agent, continue stirring for 10 minutes at a stirring temperature of 180°C, and obtain material A;

[0049] Take material A, add modified zeolite and inorganic aluminosilicate, mix and stir for 20 minutes, and obtain modified warm mixing agent;

[0050] S3: Preparation of pretreated asphalt:

[0051] Take SBS modified asphalt, heat it to 170°C, add polyphosphoric acid after dehydration, the addition rate is 5g / s, mix and stir for 30min, the stirring rate is 500r / min, keep warm and swell for 25min, an...

Embodiment 2

[0060] S1: Prepare materials;

[0061] S2: Preparation of Modified Warm Mixing Agent:

[0062] Take zeolite, dissolve it in sodium hydroxide solution, stir for 1.1h, filter, dry at 81°C, put it in ethanol solution of octadecylamine, continue stirring for 35min, and dry at 83°C to obtain modified zeolite;

[0063] Take the surfactant and the warm mix, mix and stir for 11 minutes at a stirring temperature of 125°C, then add a stabilizer, a viscosity reducer and an anti-aging agent, continue stirring for 11 minutes at a stirring temperature of 185°C, and obtain material A;

[0064] Take material A, add modified zeolite and inorganic aluminosilicate, mix and stir for 25 minutes, and obtain modified warm mixing agent;

[0065] S3: Preparation of pretreated asphalt:

[0066] Take SBS modified asphalt, heat it to 172°C, add polyphosphoric acid after dehydration, the addition rate is 5g / s, mix and stir for 33 minutes, the stirring rate is 500r / min, heat preservation and swelling for...

Embodiment 3

[0075] S1: Prepare materials;

[0076] S2: Preparation of Modified Warm Mixing Agent:

[0077] Take zeolite, dissolve it in sodium hydroxide solution, stir for 1.2 hours, filter, dry at 82°C, place in ethanol solution of octadecylamine, continue stirring for 40min, and dry at 85°C to obtain modified zeolite;

[0078] Take the surfactant and the warm mix, mix and stir for 12 minutes at a stirring temperature of 130°C, then add a stabilizer, a viscosity reducer and an anti-aging agent, continue stirring for 12 minutes at a stirring temperature of 190°C, and obtain material A;

[0079] Take material A, add modified zeolite and inorganic aluminosilicate, mix and stir for 30 minutes, and obtain modified warm mixing agent;

[0080] S3: Preparation of pretreated asphalt:

[0081] Take SBS modified asphalt, heat it to 175°C, add polyphosphoric acid after dehydration, the addition rate is 5g / s, mix and stir for 35 minutes, the stirring rate is 500r / min, keep warm and swell for 30 min...

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Abstract

The invention discloses an environment-friendly warm mix asphalt mixture and a preparation method thereof. The asphalt mixture comprises the following raw materials in parts by weight: 10-15 parts ofpretreated asphalt, 80-90 parts of aggregate, 5-8 parts of mineral powder, 2-3 parts of silica fume, 2-3 parts of fly ash, 3-7 parts of a modified warm mixing agent, 8-12 parts of a first additive and8-10 parts of a second additive. The invention discloses an environment-friendly warm mix asphalt mixture and a preparation method thereof. . The preparation method has reasonable process design andproper component ratio; by pretreating a warm mixing agent and SBS modified asphalt, the mixing performance and the stability of the asphalt mixture are synergistically improved. According to the modified asphalt mixture, the mixing and construction temperature of the modified asphalt mixture can be obviously reduced, the bonding acting force between modified asphalt and aggregate is improved, themechanical property and aging resistance of the asphalt mixture are effectively improved, the high-temperature rutting resistance, low-temperature fatigue resistance and water damage resistance are excellent, and high practicability is achieved.

Description

technical field [0001] The invention relates to the technical field of asphalt mixture, in particular to an environment-friendly warm asphalt mixture and a preparation method thereof. Background technique [0002] Asphalt mixture is a general term for mixtures made by mixing mineral aggregates and asphalt binders. According to the composition and structure of materials, it can be divided into continuous graded mixtures and discontinuous graded mixtures. According to the mineral material gradation composition and porosity, it can be divided into dense gradation, semi-open gradation and open gradation mixture. According to the size of the nominal maximum particle size, it can be divided into extra-coarse, coarse-grained, medium-grained, fine-grained, and sand-grained asphalt mixtures. [0003] During the mixing process of today's asphalt mixture, thermal aging will occur rapidly in a short period of time, which will have a great impact on the comprehensive performance of asph...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B24/26C04B24/04C04B16/06C04B20/02C04B14/04C04B111/20
CPCC04B26/26C04B20/023C04B2111/0075C04B24/2694C04B40/0039C04B2111/20C04B14/047C04B24/00C04B24/085C04B14/00C04B14/104C04B22/085C04B24/045C04B22/068C04B2103/40C04B2103/0068C04B16/0658C04B2103/34C04B2103/60C04B14/041C04B18/141C04B18/146C04B18/08Y02A30/30
Inventor 赵俊
Owner SHANDONG HUITONG CONSTR GRP CO LTD
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