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Emulsifying regenerant with workability and preparation method thereof

A technology of emulsifying regenerant and emulsifier, which is applied in building components, building insulation materials, buildings, etc. It can solve the problems of poor construction workability and high heating temperature, and achieve the improvement of construction workability, improvement of interface state and good performance recovery effect of effect

Active Publication Date: 2021-06-25
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: In view of the poor construction workability of recycled asphalt mixture in the prior art, and the high heating temperature when the regenerant is used, the present invention provides an emulsified regenerant with construction workability and its preparation method. The emulsified rejuvenator has low viscosity at normal temperature (20°C), has good fluidity and permeability, can be sprayed, can improve the ease of construction of RAP, and reduce the construction temperature

Method used

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  • Emulsifying regenerant with workability and preparation method thereof
  • Emulsifying regenerant with workability and preparation method thereof
  • Emulsifying regenerant with workability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation of emulsified regenerant A, the steps are as follows:

[0024] (1) Heat 55.8 parts by mass of minus four-line extraction oil to 130°C, add 2.4 parts by mass of SBS modifier, and cut with a shearing machine for 60 min. Then, at 80 °C, add 1.2 parts by mass of silane coupling agent KH 550, and after ultrasonic dispersion for 60 min, add 1.2 parts of sulfur powder at 120 °C and stir for 120 min to prepare component A.

[0025] (2) Heat 39.2 parts by mass of water to 50°C, add 0.4 parts by mass of slow-breaking and fast-setting cationic emulsifier PRAC417 and 0.4 parts by mass of dilute hydrochloric acid with a mass fraction of 20%, stir until the flocs disappear, and adjust the pH to 2 , formulated as Emulsion B.

[0026] (3) Heat component A to 100 °C, then add emulsion B, emulsify and shear at 3500 rpm for 45 min at 80 °C to obtain an emulsification regenerant, such as figure 1 shown.

Embodiment 2

[0028] The preparation of emulsified regenerant B, the steps are as follows:

[0029] (1) Heat 48.3 parts by mass of minus three-line extraction oil to 110°C, add 0.9 parts by mass of SBR modifier, and cut with a shearing machine for 75 min. Then at 90°C, add 0.6 parts by mass of chelating titanate coupling agent QX-311W, and after ultrasonic dispersion for 45 minutes, add 0.2 parts of polyisobutylene at 110°C and stir for 140 minutes to prepare component A.

[0030] (2) Heat 49.5 parts by mass of water to 60°C, add 0.3 parts by mass of slow-splitting and fast-setting cationic emulsifier MQ65 and 0.2 parts by mass of dilute hydrochloric acid with a mass fraction of 20%, stir until the flocs disappear, and adjust the pH to 2.2 , formulated as Emulsion B.

[0031] (3) Heat component A to 90 °C, then add emulsion B, emulsify and shear at 3000 rpm for 60 min at 70 °C, and obtain emulsification regenerant B.

Embodiment 3

[0033] The preparation of emulsified regenerant C, the steps are as follows:

[0034] (1) Heat 62 parts by mass of rubber oil to 140°C, add 3 parts by mass of EVA modifier, and cut with a shearing machine for 45 minutes. Then at 70 °C, add 3 parts by mass of aluminum-zirconium coupling agent LD 139, ultrasonically disperse for 75 min, add 2 parts of polyphosphoric acid at 140 °C and stir for 100 min to prepare component A.

[0035] (2) Heat 27.5 parts by mass of water to 30°C, add 0.5 parts by mass of slow-splitting and fast-setting cationic emulsifier PRAC417, 0.5 parts by mass of slow-splitting and fast-setting cationic emulsifier MQ65 and 1.5 parts by mass of 30% dilute cationic emulsifier. Sulfuric acid, stir until the flocs disappear, pH is adjusted to 1.8, and emulsion B is prepared.

[0036] (3) Heating component A to 100°C, then adding emulsion B, emulsifying and shearing at 90°C at a speed of 4000 rpm for 30 minutes, to obtain emulsification regenerant C.

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Abstract

The invention discloses an emulsifying regenerant with workability and a preparation method thereof. The emulsifying regenerant is prepared from the following raw materials in parts by mass: 0.3-1 part of an emulsifier, 0.2-2 part of a stabilizer, 27.5-49.5 parts of water, 0.2-1.5 part of acid, 0.9-3 part of a modifier, 0.6-3 part of a coupling agent and 48.3-62 parts of light oil. The emulsifying regenerant with construction workability can well recover the performance of aged asphalt and improve the utilization rate of waste pavement materials, has the viscosity of 100-300 mPa.s at the normal temperature (20 DEG C), has good fluidity and permeability, is easy to spray, and can improve the construction workability of a regenerated asphalt mixture and reduce the mixing temperature of 5-16 DEG C. The invention has great significance in promoting recycling and sustainable development of waste resources.

Description

technical field [0001] The invention relates to asphalt pavement maintenance materials, in particular to an emulsified regenerant with workability and a preparation method thereof. Background technique [0002] By the end of 2017, my country's total highway mileage has reached 4.7735 million kilometers, of which 136,500 kilometers are expressways, ranking first in the world in terms of mileage. With the basic formation of my country's highway construction network and the increase in the number of years of operation, there are more and more large and medium repair and reconstruction and expansion projects. The annual maintenance of waste asphalt pavement material (RAP) alone produces more than 20 million tons, and this number every year Also growing at a rate of 15%, how to deal with this waste is a huge problem. [0003] The plant mixing hot recycling technology can not only reuse RAP, save costs, protect the environment, and conform to the concept of recycling and sustain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L9/06C08L23/20C08L23/08C08K5/544C08K3/06C08K5/00C08K3/32
CPCC08L95/00C08K2003/329C08L53/02C08L9/06C08L23/22C08L23/0853C08K5/544C08K3/06C08K5/0091C08K3/32
Inventor 董夫强马辉唐伟李宁祝争艳秦成林詹贺于新
Owner HOHAI UNIV