A kind of warm mix asphalt additive and preparation method thereof

A technology of warm-mix asphalt and additives, applied in building insulation materials, building components, climate change adaptation, etc., can solve the problems of large-scale road paving, high energy consumption, excessive emission of harmful gases, etc., and achieve obvious economical Social benefits, energy saving and environmental protection, and the effect of reducing mixing temperature

Inactive Publication Date: 2011-12-07
杭州市城市建设科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, problems such as thermal aging, high energy consumption and excessive emission of harmful gases will occur in the process of mixing, transportation and paving of hot-mix asphalt mixture. The existence of these problems limits the comprehensive promotion and application of hot-mix asphalt mixture technology. , and has drawn strong attention from countries to its application
[0003] The cold-mix asphalt mixture process uses emulsified asphalt and mixes it with stone materials at room temperature to obtain asphalt mixture. The paveme...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0054] A preparation method of any one of the above-mentioned warm-mix asphalt additives, which comprises the following steps:

[0055] (1) Add a certain amount of solvent and alkoxysilane into the three-necked flask according to the proportioning weight, and heat to 80°C;

[0056] (2) Add a mixture of acid catalyst, base catalyst and deionized water, and react at a constant temperature of 80°C for 90 minutes;

[0057](3) Heat up to 100°C, condense and reflux for 120 minutes, and collect about 55ml of fraction;

[0058] (4) Add an acid catalyst and a certain amount of polyether into the flask, and heat up the esterification reaction for 180 minutes;

[0059] (5) Vacuumize, condense and reflux for 30 minutes, cool down to room temperature, add a certain amount of melamine formaldehyde resin and stir evenly, add an appropriate amount of alkali catalyst to adjust the pH to about 8, and the finished product is obtained.

Embodiment 1

[0060] Example 1: Accurately weigh 12 parts of methyltriethoxysilane, 2 parts of dimethyldimethoxysilane and 50 parts of methanol in a three-necked flask, heat to 80°C, and pre-mix 0.5 parts of acetic acid and 0.2 parts Add 30% ammonia water and 3 parts of deionized water to the reactor at one time, and react at a constant temperature of 80°C for 90 minutes. Raise the temperature to 100°C, condense and reflux for 120 minutes, collect about 50ml of distillate, add 0.1 part of concentrated sulfuric acid and polyethylene glycol 2 with a molecular weight of 1000 Put a portion in a flask, heat up for esterification reaction for 180 minutes, vacuumize, condense and reflux for 30 minutes, cool down to room temperature, add 0.3 parts of highly methylated melamine formaldehyde resin, stir well, add sodium hydroxide to adjust pH = about 8, and the finished product is obtained.

Embodiment 2

[0061] Example 2: Accurately weigh 12 parts of methyltrimethoxysilane and 30 parts of isopropanol in a three-necked flask, heat to 80°C, pre-mix 0.5 parts of formic acid, 0.1 parts of aminosilane and 4 parts of deionized water, once Put it into the reaction kettle, and react at a constant temperature of 80°C for 60min. Raise the temperature to 110°C, condense and reflux for 90min, collect about 60ml of fraction, add 0.1 part of p-toluenesulfonic acid and 3 parts of polyethylene glycol with a molecular weight of 600 in the flask, and heat up for esterification reaction After 180 minutes, vacuumize, condense and reflux for 30 minutes, cool down to room temperature, add 0.2 parts of partially methylated melamine formaldehyde resin, stir evenly, add ammonia water to adjust pH=7.5, and the finished product is obtained.

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PUM

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Abstract

A warm-mix asphalt additive machine preparation method, the additive is formed by reacting the following components in parts by weight: 4-15 parts of alkoxysilane, 1-8 parts of polyether, 0-1 part of melamine formaldehyde resin, and 0 parts of acid catalyst -1 part, 0-1 part of alkali catalyst, 2-10 parts of deionized water, 30-100 parts of solvent; the preparation method comprises the following steps: (1) adding a quantitative amount of solvent and Alkoxysilane, heated to 80°C; (2) Add a mixture of acid catalyst, base catalyst, and deionized water, and react at a constant temperature of 80°C for 90 minutes; (3) Heat up to 100°C, condense and reflux for 120 minutes, and collect about 55ml of distillate; ( 4) Add an acid catalyst and a certain amount of polyether into the flask, heat up the esterification reaction for 180 minutes; (5) evacuate, condense and reflux for 30 minutes, cool down to room temperature, add a certain amount of melamine formaldehyde resin and stir evenly, add an appropriate amount of alkali catalyst to adjust the pH = 8 or so, the finished product is obtained.

Description

technical field [0001] The invention relates to a warm-mix asphalt additive and a preparation method thereof, belonging to the technical field of highway pavement construction. Background technique [0002] At present, the asphalt mixture used in the construction of highway pavement is usually carried out in two forms: hot mix and cold mix. Hot mix asphalt mixture road construction technology is widely used in road construction due to its excellent performance, and after decades of development, the technology has been quite mature. However, problems such as thermal aging, high energy consumption and excessive emission of harmful gases will occur in the process of mixing, transportation and paving of hot-mix asphalt mixture. The existence of these problems limits the comprehensive promotion and application of hot-mix asphalt mixture technology. , and arouse the strong attention of various countries to its application. [0003] The cold-mix asphalt mixture process uses e...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L61/28C08L71/08C08L71/02C08K5/5419C08K5/42C08K5/09C08K3/22C08K5/17C08K5/5445C08K5/19
CPCY02A30/30
Inventor 俞方英
Owner 杭州市城市建设科学研究院
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