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Modified emulsified asphalt and preparation method thereof

A technology for emulsified asphalt and modified asphalt, which is applied in the direction of asphalt material adhesive, adhesive type, building components, etc. High problems, to achieve the effect of short demulsification curing time, simple and reliable method, and easy spraying

Pending Publication Date: 2018-12-28
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For modified emulsified asphalt, although the existing patents use a variety of modifiers and additives, the viscosity index of the prepared modified emulsified asphalt evaporation residue is not high (60 ° C dynamic viscosity is lower than 2000Pa s) , unable to meet the high waterproof performance and high bond strength performance requirements of special modified emulsified asphalt used for drainage pavement waterproof adhesive layer

Method used

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  • Modified emulsified asphalt and preparation method thereof
  • Modified emulsified asphalt and preparation method thereof
  • Modified emulsified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The invention provides a kind of preparation method of modified emulsified asphalt, the method comprises:

[0030] Take 55-65wt% of SBS modified asphalt heated to 168-180°C and 35-45wt% of soap liquid heated to 55-70°C and put them into emulsification equipment for shear emulsification to obtain the modified emulsified asphalt .

[0031] Further, the emulsification equipment is a colloid mill. The working pressure of the colloid mill is 0.18-0.25 MPa.

[0032] Further, the softening point of the SBS modified asphalt is not lower than 75°C, the penetration is not higher than 62 (0.1mm, 25°C), the elastic recovery is not less than 90% (25°C), and the viscosity at 135°C is not less than 1.6 Pa·s, storage stability segregation is not more than 2 ℃ (48 hours softening point difference).

[0033] Further, the pH value of the soap liquid is 1.5-2.5. The soap liquid is prepared by mixing 0.75-2.5wt% of alkyl imidazoline emulsifier, 1.75-3.5wt% of additives and 32.5-40wt% of...

Embodiment 1～5

[0039] The parameters of Examples 1 to 5 are shown in Table 1. The soap solution after heating and preheating the SBS modified asphalt shown in Table 1 is emulsified under a certain pressure through a colloid mill to prepare a sponge-type urban road drainage pavement. The special modified emulsified asphalt used for the waterproof adhesive layer, the preparation process and the parameters of the modified emulsified asphalt are shown in Table 1.

[0040] Table 1 Examples 1-5 The implementation conditions, asphalt performance and application performance of the special modified emulsified asphalt prepared for the waterproof adhesive layer of the sponge-type urban road drainage pavement.

[0041]

[0042]

Embodiment 6～10

[0044] The parameters of Examples 6 to 10 are shown in Table 2. The soap solution after heating and preheating the SBS modified asphalt shown in Table 2 is emulsified under a certain pressure through a colloid mill to prepare a sponge-type urban road drainage pavement. The special modified emulsified asphalt used for the waterproof adhesive layer, the preparation process and the parameters of the modified emulsified asphalt are shown in Table 2.

[0045] Table 2 Implementation conditions, asphalt performance and application performance of special modified emulsified asphalt prepared for sponge-type urban road drainage pavement waterproof adhesive layer in Examples 6-10.

[0046]

[0047]

[0048]

[0049] In the technical scheme provided by this application, SBS modified asphalt is used as the raw material, and at the same time, higher requirements are placed on the high temperature softening point, viscosity and 5°C ductility of the SBS modified asphalt raw material, ...

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Abstract

The invention discloses modified emulsified asphalt and a preparation method thereof. According to the method, SBS modified asphalt heated to 168-180 DEG C and liquid soap heated to 55-70 DEG C are added to emulsifying equipment together for shear emulsification, and the modified emulsified asphalt is obtained. The method is simple and reliable; ceiling temperature of the modified asphalt and theliquid soap is controlled, energy is saved, and manufacture cost is reduced. The prepared modified emulsified asphalt is stored stably, the demulsification speed being rapid breaking or medium breaking of the emulsified asphalt is taken into consideration, so that the asphalt is easy to spray in construction, the demulsification curing time is short, and follow-up construction is not affected. Waterproofness and bonding performance of the modified emulsified asphalt when applied to a bonding layer material are obviously higher than those of the modified emulsified asphalt material in the priorart. The prepared bonding layer material can have excellent ageing resistance, bonding performance, waterproofness and high-low-temperature stability.

Description

technical field [0001] The invention relates to the technical field, in particular to a modified emulsified asphalt with simple process, low cost and good storage stability and a preparation method thereof. Background technique [0002] With the national sponge city construction on the agenda, more and more attention has been paid to the construction of drainage pavements. [0003] The surface layer of the drainage pavement is usually graded asphalt concrete with a porosity of 15-25% and an asphalt content of about 4-5%. After rainwater enters the surface layer of the drainage pavement, it is stored or discharged laterally. Therefore, in addition to good bonding strength, the bonding layer material of the drainage pavement must also have high waterproof penetration function and mechanical strength, and be able to adapt to the actual conditions of the project. Under the high and low temperature stability, durability and ease of operation. [0004] The existing adhesive laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08J3/03C09J195/00C09J153/02
CPCC09J195/00C08J3/03C08L95/00C08J2395/00C08J2453/02C08L2201/08C08L53/02
Inventor 时敬涛李纯袁野李剑新赵磊刘瑾潼
Owner PETROCHINA CO LTD
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