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Environment-friendly warm-mixed asphalt mixture

A technology for asphalt mixture and warm mix asphalt, applied in the field of asphalt mixture, can solve problems such as practical application inconvenience, influence of comprehensive performance of asphalt mixture, thermal aging, etc. The effect of improving the ability of shear deformation

Active Publication Date: 2021-04-13
长春建业集团股份有限公司
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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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  • Environment-friendly warm-mixed asphalt mixture
  • Environment-friendly warm-mixed asphalt mixture

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-mixed asphalt mixture and a preparation method thereof. The asphalt mixture comprises the following raw materials in parts by weight: 10-15 parts of pretreated 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 mix agent, 8-12 parts of a first additive and 8-10 parts of a second additive. The invention discloses an environment-friendly warm-mixed asphalt mixture and a preparation method thereof, the environment-friendly warm-mixed asphalt mixture is reasonable in process design and proper in component proportion, a warm-mixing agent and SBS modified asphalt are pretreated to synergistically improve the mixing performance and stability of the asphalt mixture, the mixing and construction temperature of the modified asphalt mixture can be obviously reduced, the bonding force between the modified asphalt and the aggregate is improved, the mechanical properties and aging resistance of the asphalt mixture are effectively improved, and the asphalt mixture has excellent high-temperature rutting resistance, low-temperature fatigue resistance and water damage resistance, and has high practicability.

Description

technical field [0001] The invention relates to the technical field of asphalt mixture, in particular to an environment-friendly warm asphalt mixture. 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 asphalt mixture and bring inconvenien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B38/02C04B20/02
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 长春建业集团股份有限公司
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