A warm-mixed high-viscosity modified asphalt and its preparation and application

A modified asphalt, high-viscosity technology, used in building thermal insulation materials, roads, road repair and other directions, can solve the problems of lack of improvement in dynamic viscosity and Brookfield viscosity of asphalt materials, affecting the health of construction workers, and low dynamic viscosity of asphalt materials. To achieve the effect of being conducive to the development of the ecological environment, cost-effective, and good high temperature stability

Active Publication Date: 2021-03-16
ZHONGLU HI TECH (BEIJING) HIGHWAY TECHNOLOGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN105585854A "An easy-to-construct high-viscosity modified asphalt and its preparation method" improves the high and low temperature performance of high-viscosity modified asphalt materials, reduces the construction mixing temperature, but the dynamic viscosity of the asphalt material is relatively low, and the preparation process complex
Chinese patent CN102276993A "A High Viscosity and Toughness Composite SBR Modified Asphalt and Its Preparation Method for Warm Mix Asphalt Technology" discloses a technology of alkyl condensate and SBR composite modified asphalt, which improves the viscosity and toughness of asphalt materials and toughness, but no improvement in kinematic and Brookfield viscosities of asphalt materials
Due to the high temperature in the production and mixing of hot mix asphalt mixture, it usually reaches 160-180 ℃, and a large amount of fuel will be consumed during the heating process, and more CO will be released at the same time. 2 Such waste gas will increase the environmental burden while reducing the quality of the construction environment, which will affect the health of construction workers. In addition, in view of its temperature requirements, there are also requirements for the construction season. After autumn, the ambient temperature is low, and construction operations are basically impossible. Construction Schedule

Method used

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  • A warm-mixed high-viscosity modified asphalt and its preparation and application
  • A warm-mixed high-viscosity modified asphalt and its preparation and application
  • A warm-mixed high-viscosity modified asphalt and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0032] Preparation of Warm Mix High Viscosity Modified Asphalt

[0033] Step 1: Add 90 parts of base asphalt (SK90#) at 150°C and add 3 parts of rubber oil and stir for 15 minutes, heat up to 180°C and add 6 parts of SBS (791H, Yueyang Petrochemical) and 1 part of SBR at high speed for 30 minutes while shearing. get the mixture;

[0034] Step 2: Add 2 parts of ethylene bis stearic acid amide, 0.5 part of sodium stearate, and 0.5 part of polyethylene wax (polymer wax) to the mixture obtained in step 1 at a temperature of 175° C., and stir for 10 minutes. Slowly add 0.25 parts of stabilizer at 180°C to shear for 10 minutes, and finally develop at 175°C for 4 hours.

Embodiment 2

[0036] Preparation of Warm Mix High Viscosity Modified Asphalt

[0037] Step 1: Add 86 parts of base asphalt (SK70#) at 145°C and add 4 parts of rubber oil and stir for 20 minutes, then add 5 parts of SBS (791H, Yueyang Petrochemical) and 0.5 parts of SBR for 30 minutes at high speed while heating to 180°C. get the mixture;

[0038] Step 2: Add 6 parts of rubber powder particles to the mixture obtained in Step 1 at a temperature of 180°C and cut for 20 minutes, add 1 part of ethylene bis stearic acid amide and 1 part of sodium stearate at 180°C , 0.5 parts of polyethylene wax, stirring for 15 minutes, slowly adding 0.2 parts of stabilizer at 180°C, shearing for 15 minutes, and finally developing at 175°C for 3 hours.

[0039] In this embodiment, the colloids are made of waste rubber powder. The high molecular polymer SBS is expensive, and the high-volume SBS modified asphalt is easy to stick during the production process, which affects the production of high-viscosity modifie...

Embodiment 3

[0041] Preparation of Warm Mix High Viscosity Modified Asphalt

[0042] Step 1: Add 3 parts of rubber oil to 82 parts of base asphalt (Shuanglong 70#) at 165°C and stir for 20 minutes, then add 4 parts of SBS (791H, Yueyang Petrochemical) and 1 part of SBR at high speed for 30 minutes while heating up to 180°C , to get a mixture;

[0043] Step 2: Add 6 parts of rubber powder particles (same as in Example 2) to the mixture obtained in Step 1 at a temperature of 180°C for 20 minutes, and add 1 part of ethylene bis-stearamide at 175°C. 1 part of sodium stearate, 0.5 part of polyethylene wax, stir for 20 minutes, slowly add 0.2 parts of stabilizer at 180°C, cut for 10 minutes, and finally develop at 175°C for 4 hours.

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Abstract

The invention provides a warm-mix high-viscosity modified asphalt, and is prepared from the following raw materials in parts by mass: 80-90 parts of matrix asphalt, 0-3 parts of N,N'-ethylenebis(stearamide), 0-2 parts of stearic acid or stearate, 0-1 part of high-molecular wax, 3-8 parts of styrene-butadiene-styrene block copolymer, 0-2 parts of styrene butadiene rubber, 2-5 parts of rubber oil, 0-8 parts of colloidal particles and 0.1-0.3 part of a stabilizer. According to the warm-mix high-viscosity modified asphalt provided by the invention, the production and mixing temperature of the mixture is reduced while the performance index is not influenced; the power viscosity of the warm-mix high-viscosity modified asphalt at 60 DEG C reaches 100000 Pa.s or above; the Brookfield viscosity at135 DEG C is 2000 mPa.s or below; the mixing temperature and the compaction temperature required by the high-viscosity asphalt mixture are reduced; and compared with the mixing temperature of the heat-mix asphalt mixture, the mixing temperature is reduced by about 20-30 DEG C. The fuel consumption can be reduced, the waste gas emission can be reduced, and the operation environment of a constructorcan be improved.

Description

technical field [0001] The invention belongs to the field of asphalt material composition, and in particular relates to a high-viscosity modified asphalt and a preparation method thereof. Background technique [0002] Drainage pavement, colored pavement and permeable pavement of sponge city asphalt pavement have higher requirements on the viscosity of asphalt materials. High-viscosity and high-elasticity modified asphalt requires higher mixing temperature and compaction temperature, and requires more fuel consumption in engineering applications. [0003] Chinese patent CN105585854A "An easy-to-construct high-viscosity modified asphalt and its preparation method" improves the high and low temperature performance of high-viscosity modified asphalt materials, reduces the construction mixing temperature, but the dynamic viscosity of the asphalt material is relatively low, and the preparation process complex. Chinese patent CN102276993A "A High Viscosity and Toughness Composite ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08L51/00C08L9/06C08L23/06C08K5/20C08K5/098E01C19/08
CPCC08L95/00C08L2201/08C08L2205/035E01C19/08C08L53/02C08L51/006C08L9/06C08L23/06C08K5/20C08K5/098
Inventor 曹东伟张海燕夏磊卜冠军卢杰王召灿
Owner ZHONGLU HI TECH (BEIJING) HIGHWAY TECHNOLOGY CO LTD
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