Easily-prepared anti-adhesive emulsified asphalt achieving normal-temperature rapid demulsification and preparation method thereof
An emulsified asphalt and adhesion technology, which is applied in building thermal insulation materials, building components, buildings, etc., can solve the problems of reduced construction efficiency, difficulty in emulsification, and shortened service life of pavement, so as to improve construction efficiency, shorten construction time, and improve service life. Effect
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Embodiment 1
[0035] The following raw materials were used to prepare emulsified asphalt: AH-70 asphalt was selected as the heavy traffic road asphalt; the softening point of deoiled asphalt was 135°C; the interface modifier was ammonium salt cationic surfactant; the polymer latex was selected as evaporation residue with a solid content of 60 % of styrene-butadiene latex; the cationic fast-cracking emulsifier E4819 was selected as the asphalt emulsifier; the auxiliary agent was hydroxyethyl cellulose;
[0036] Concrete preparation method comprises the following steps:
[0037] (1) Dissolving and diluting the auxiliary agent with water to obtain an auxiliary agent-water solution, then adding asphalt emulsifier, auxiliary agent-water solution, polymer latex and acid-base regulator into water at a temperature of 50-60°C and stirring to prepare a soap liquid, The pH value of the soap solution is adjusted to 2.0 to 3.5, and the temperature of the soap solution is controlled at 50°C to 60°C.
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Embodiment 2
[0043] The emulsified asphalt was prepared by using the following raw materials: AH-70 asphalt was selected as the heavy traffic road asphalt; the softening point of deoiled asphalt was 135°C; the interface modifier was ammonium salt cationic surfactant; the polymer latex was selected as the evaporation residue with a solid content of 52 % of ethylene-propylene latex; the asphalt emulsifier uses cationic fast-cracking emulsifier EM620; the auxiliary agent is carboxymethyl cellulose; the pH regulator is hydrochloric acid, and the mass percentages of the above components are shown in Table 1.
[0044] Concrete preparation method is with embodiment 1.
[0045] Prepare the emulsified asphalt according to 0.6Kg / m 2 The amount is spread on the rut plate, and the indoor temperature is 25°C. The surface drying test results are shown in Table 2. The emulsified asphalt prepared in this example breaks into shape and becomes surface-dry within 15 minutes, while the surface-drying time of...
Embodiment 3
[0048] The emulsified asphalt was prepared using the following raw materials: AH-70 asphalt was selected as the heavy traffic road asphalt; the softening point of deoiled asphalt was 135°C; the interface modifier was ammonium salt cationic surfactant; the polymer latex was selected as evaporation residue with a solid content of 50 % of isoprene latex; cationic fast-cracking emulsifier EM620 was selected as the asphalt emulsifier; the auxiliary agent was hydroxyethyl cellulose;
[0049] Concrete preparation method is with embodiment 1.
[0050] Prepare the emulsified asphalt according to 0.6Kg / m 2 The amount is spread on the rut plate, and the indoor temperature is 25°C. The surface drying test results are shown in Table 2. The emulsified asphalt prepared in this example breaks into shape and becomes surface-dry within 15 minutes, while the surface-drying time of ordinary sticky layer emulsified asphalt and SBS modified emulsified asphalt exceeds 40 minutes.
[0051] After th...
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