Method for preparing expanded asphalt

A technology of expanded asphalt and asphalt, which is applied in the field of preparation of expanded asphalt, can solve the problems of poor foam stabilization performance of expanded asphalt, poor product bonding strength, poor mechanical properties, etc., and achieve good viscoelasticity, improved mechanical properties, and increased cohesion Effect

Inactive Publication Date: 2018-08-14
周荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is: aiming at the disadvantages of poor foam stabilization performanc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020]Mix chitosan and water at a mass ratio of 1:15 and pour it into the No. 1 beaker, stir and mix with a glass rod for 15 minutes, and then stand for 5 hours at room temperature to swell, and then add a shell with 0.08 times the mass of chitosan. Glycanase, then move the No. 1 beaker into a digital-display speed-measuring constant temperature magnetic stirrer, under the conditions of a temperature of 35 °C and a rotation speed of 500 r / min, constant temperature stirring for enzymatic hydrolysis for 60 min, and then at a temperature of 90 °C, the enzyme was inactivated by heat preservation. After 15 minutes, transfer the material in the No. 1 beaker to a rotary evaporator, under the conditions of a temperature of 85 °C and a pressure of 550 kPa, concentrate under reduced pressure for 2 hours to obtain a concentrated solution, and then transfer the concentrated solution to an oven, at a temperature of 110 °C Under conditions, dry to constant weight to obtai...

Example Embodiment

[0021] Example 2

[0022] Mix chitosan and water at a mass ratio of 1:15 and pour it into the No. 1 beaker, stir and mix with a glass rod for 15 minutes, and then stand for 5 hours at room temperature to swell, and then add a shell with 0.08 times the mass of chitosan. Glycanase, then move the No. 1 beaker into a digital-display speed-measuring constant temperature magnetic stirrer, under the conditions of a temperature of 35 °C and a rotation speed of 500 r / min, constant temperature stirring for enzymatic hydrolysis for 60 min, and then at a temperature of 90 °C, the enzyme was inactivated by heat preservation. After 15 minutes, transfer the material in the No. 1 beaker to a rotary evaporator, under the conditions of a temperature of 85 °C and a pressure of 550 kPa, concentrate under reduced pressure for 2 hours to obtain a concentrated solution, and then transfer the concentrated solution to an oven, at a temperature of 110 °C Under conditions, dry to constant weight to obta...

Example Embodiment

[0023] Example 3

[0024] Mix chitosan and water at a mass ratio of 1:15 and pour it into the No. 1 beaker, stir and mix with a glass rod for 15 minutes, and then stand for 5 hours at room temperature to swell, and then add a shell with 0.08 times the mass of chitosan. Glycanase, then move the No. 1 beaker into a digital-display speed-measuring constant temperature magnetic stirrer, under the conditions of a temperature of 35 °C and a rotation speed of 500 r / min, constant temperature stirring for enzymatic hydrolysis for 60 min, and then at a temperature of 90 °C, the enzyme was inactivated by heat preservation. After 15 minutes, transfer the material in the No. 1 beaker to a rotary evaporator, under the conditions of a temperature of 85 °C and a pressure of 550 kPa, concentrate under reduced pressure for 2 hours to obtain a concentrated solution, and then transfer the concentrated solution to an oven, at a temperature of 110 °C Under conditions, dry to constant weight to obta...

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PUM

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Abstract

The invention discloses a method for preparing expanded asphalt, and belongs to the technical field of materials for paving pavements. The method comprises the following steps: performing a heat insulation reaction on a functional assistant, a sodium silicate solution, water and crushed asphalt at a lower temperature, rising the temperature, performing heat insulation foaming, lowering the temperature to room temperature, adding isocyanate, and continuously performing stirring and reacting to obtain the expanded asphalt, wherein the functional assistant is obtained by mixing a self-made emulsified dispersion, polyethyleneimine and a crosslinking agent, and carbon dioxide is continuously introduced into the system in the mixing process; and the emulsified dispersion is formed by octenyl succinic acid modified starch, enzymatically hydrolyzed chitosan, water and linoleic acid. The expanded asphalt prepared in the invention has the characteristics of excellent mechanical properties, prolonged foam stabilizing time and effectively improved bonding strength.

Description

technical field [0001] The invention discloses a preparation method of expanded asphalt, which belongs to the technical field of road surface paving materials. Background technique [0002] The increase in the price of asphalt materials and the reduction in the availability of high-quality aggregates have prompted the road sector to carry out research and application of recycled pavement materials. Pavement regeneration can be divided into cold regeneration and hot regeneration, and these two methods have their own methods of factory-mixed construction and on-site construction. From the perspective of saving energy and transportation costs, on-site cold regeneration is the most suitable way. Foamed asphalt, as a regeneration agent and stabilizer for on-site cold regeneration of road materials, has its outstanding characteristics. In recent years, foamed asphalt has once again attracted the attention of researchers and road departments. [0003] Foamed asphalt is also call...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L33/26C08L79/02C08L5/08C08L3/06C08K13/02C08K3/28C08K3/34C08J9/08C08J9/12C08J3/24
CPCC08J9/08C08J3/246C08J9/0061C08J9/0066C08J9/122C08J2203/02C08J2203/06C08J2203/184C08J2395/00C08J2403/06C08J2405/08C08J2433/26C08J2479/02
Inventor 周荣许永博黄浩
Owner 周荣
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