1. Introduction to slow cracking and fast setting asphalt emulsifier

Slow cracking and fast setting asphalt emulsifier is a special type of asphalt emulsifier mainly used for the preparation of emulsified asphalt. Its characteristic is that the demulsification speed is slow, but the molding speed of the mixture is fast, hence the name "slow cracking and fast solidification". This emulsifier reduces the surface tension of asphalt and water, allowing them to mix under mechanical action to form a water in oil liquid. It is widely used in processes such as micro surfacing, slurry sealing, and pit repair in road maintenance and construction. Slow cracking and fast setting asphalt emulsifier (R5521) is a cationic amide asphalt emulsifier with excellent asphalt emulsification ability and wide applicability to asphalt. It can be used in low doses for the emulsification production of base asphalt and modified asphalt. Can be used for low-temperature and tunnel micro surface construction. It can also be used to produce BCR and SBS modified emulsified asphalt cold mix and cold lay ultra-thin surface.

2. Chemical composition and synthesis method of slow cracking and fast setting asphalt emulsifier

Slow cracking and fast setting asphalt emulsifiers are usually synthesized from raw materials such as nonylphenol polyoxyethylene ether, epichlorohydrin, and trimethylamine. The specific synthesis method includes reacting nonylphenol polyoxyethylene ether with epichlorohydrin to generate a polyoxyethylene cationic asphalt emulsifier N - [2-hydroxy-3-nonylphenol polyoxyethylene ether (15)] propyl trimethylammonium chloride. By adjusting various factors such as emulsifier dosage, aqueous solution pH value, and colloid mill speed, the stability and particle uniformity of emulsified asphalt can be optimized.

3. Performance characteristics of slow cracking and fast setting asphalt emulsifier

(1) Slow cracking: The demulsification speed is slow, which is beneficial for uniform mixing during the construction process.

(2) Fast setting: The mixture has a fast molding speed and can quickly meet the construction requirements.

(3) Good storage performance: Emulsified asphalt has good storage stability and is suitable for long-term storage.

(4) Good mixing performance: evenly mixed with stone materials, excellent construction effect.

4. Usage method of slow cracking and fast setting asphalt emulsifier

At room temperature, it is a light red viscous liquid. Before use, heat it with an electric heating belt to above 40 ° C and pour or pump it. When using, adjust the soap solution pH to 2.0-2.5 with hydrochloric acid.

5. Main technical indicators of slow cracking and fast setting asphalt emulsifier

(1) Appearance: Light red transparent viscous liquid

(2) Active ingredient content: 70%

(3) PH value: 8.0~10.0

(4) Dosage: 1.5% -1.8% (physical addition amount, base asphalt), 1.8% -2.5% (physical addition amount, modified asphalt)

(5) Packaging: 200kg/drum

6. Application fields of slow cracking and fast setting asphalt emulsifier

Slow cracking and fast setting asphalt emulsifiers are suitable for various road construction processes, such as slurry sealing, micro surfacing, and pit repair. Its excellent storage and mixing properties make it perform well under high temperature and rainy construction conditions, allowing it to quickly solidify and open to traffic, usually within 1 hour.