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SBS (styrene-butadiene-styrene triblock copolymer) and liquid rubber composite modified emulsified asphalt and preparation method thereof

A compound modified asphalt and liquid rubber technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of limited road performance improvement, poor product stability, and difficult emulsification of modified emulsified asphalt with high solid content.

Active Publication Date: 2015-04-01
TIANJIN HI TECH ENVIRONMENT DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of high emulsification difficulty of modified emulsified asphalt with high solid content, limited improvement of road performance, and poor product stability, the present invention provides a technology for compounding modified emulsified asphalt with SBS and liquid rubber. Firstly, the rubber powder is prepared into Paste liquid rubber, which is compounded with SBS as asphalt modifier to prepare compound modified asphalt, and then emulsified to make SBS liquid rubber modified emulsified asphalt, can effectively overcome the technical problem of poor stability of rubber powder emulsified asphalt, At the same time, the material performance is significantly improved

Method used

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  • SBS (styrene-butadiene-styrene triblock copolymer) and liquid rubber composite modified emulsified asphalt and preparation method thereof
  • SBS (styrene-butadiene-styrene triblock copolymer) and liquid rubber composite modified emulsified asphalt and preparation method thereof
  • SBS (styrene-butadiene-styrene triblock copolymer) and liquid rubber composite modified emulsified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 118.4g homemade paste liquid rubber and 23.6g solid linear SBS to 592g

[0027] SK90 # In the hot asphalt, the temperature is controlled at 180℃, the stirring is developed for 40 minutes, the stirring speed is 300 rpm, the shearing is 20 minutes, the shearing speed is 3500 rpm, and the 0.63g crosslinking agent is added under rapid stirring, the stirring speed is 500 rpm, and the stirring After 4 hours, SBS and liquid rubber composite modified asphalt were prepared; in addition, 16.1g of cationic emulsifier of MedVistvac, 6.3g of nonionic surfactant, 3.8g of calcium chloride, 2.0g of magnesium chloride, and the mixture was added to After mixing 248g of water at 60°C evenly, adjust the PH value to 3.0 with hydrochloric acid to prepare emulsified soap; then take 513g of the modified asphalt and 276.2g of emulsified soap prepared above and cut in a high-speed shearing machine for 25 minutes , The shear speed is 4500 min, and the SBS liquid rubber compound modified emulsifi...

Embodiment 2

[0036] Take 78g of homemade pasty liquid rubber and 15.6g of solid linear SBS and add them to 520g SK70. # In the hot asphalt, the temperature is controlled at 180℃, the stirring is developed for 40 minutes, the stirring speed is 300 rpm, the shearing is 20 minutes, the shearing speed is 3500 rpm, and the 0.62g crosslinking agent is added under rapid stirring. In 4 hours, SBS and liquid rubber composite modified asphalt were prepared; in addition, 13.2g of cationic emulsifier, 5.0g of non-ionic surfactant, 2.3g of ammonium chloride and 2.0g of calcium chloride were added to After mixing 268g of 60℃ water evenly, adjust the PH value to 3.0 with hydrochloric acid to prepare emulsified soap; then take 500g of the modified asphalt and 290g of emulsified soap prepared above and cut in a high-speed shearing machine for 25 minutes, The SBS liquid rubber compound modified emulsified asphalt can be prepared at a shear speed of 4500 rpm.

[0037] The preparation of the above-mentioned past...

Embodiment 3

[0044] Take 40g of homemade paste liquid rubber and 10g of solid linear SBS and add them to 400g SK90. # In the hot asphalt, the temperature is controlled at 180℃, the stirring is developed for 40 minutes, the stirring speed is 300 rpm, shearing is 20 minutes, the shearing speed is 3500 rpm, and 0.48g of crosslinking agent is added under rapid stirring, and the stirring speed is 500 rpm, stirring After 4 hours, SBS and liquid rubber composite modified asphalt were prepared; in addition, 12.4g of cationic emulsifier, 4.8g of nonionic surfactant, 3.0g of calcium chloride and 1.0g of ferric chloride were added to After mixing 490g of water at 60°C evenly, adjust the PH value to 3.0 with hydrochloric acid to prepare emulsified soap; then take 410g of the modified asphalt and 269g of emulsified soap prepared above and cut in a high-speed shearing machine for 25 minutes, The SBS liquid rubber compound modified emulsified asphalt can be prepared at a shear speed of 4500 rpm.

[0045] Th...

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Abstract

The invention provides SBS (styrene-butadiene-styrene triblock copolymer) and liquid rubber composite modified emulsified asphalt and a preparation method thereof. The composite modified emulsified asphalt is prepared from the following components in parts by weight: 45-75 parts of SBS and pasty liquid rubber composite modified asphalt, 22-45 parts of water, 0.01-1.6 parts of a crosslinking agent, 2.5-13 parts of a cationic asphalt emulsifying agent, 0.5-3.0 parts of a stabilizing agent and 0.1-2.5 parts of a pH value regulator. By adopting the SBS and liquid rubber composite modified emulsified asphalt provided by the invention, the technical problem that rubber powder modified asphalt is difficult to emulsify can be solved, prepared liquid rubber can be subjected to emulsification more easily, and composite SBS is added to ensure that the pavement performance of the composite modified emulsified asphalt can be greatly improved, and wider application ranges in road maintenance and engineering construction of roads under construction can be achieved. In addition, by applying the pasty liquid rubber, good economical performance can be achieved, and waste tires can also be effectively used.

Description

Technical field [0001] The invention relates to the technical field of pavement asphalt materials, in particular to a composite modified emulsified asphalt of SBS and liquid rubber and a preparation method thereof. Background technique [0002] In the current technical field of modified emulsified asphalt, the existing modified emulsified asphalt mainly includes SBS, SBR polymer modified emulsified asphalt, and rubber powder modified emulsified asphalt. SBS and SBR are high-molecular polymer modifiers, which are divided into solid modification and emulsion modification. Generally, the asphalt is modified first, and then the modified asphalt is emulsified, but the polymer modified asphalt has a high solid content Emulsification is very difficult and the product quality is unstable. SBS or SBR latex is also mixed into ordinary emulsified asphalt for modification, but the improvement of road performance of the modified latex is limited, and the separation of latex and emulsified as...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L21/00C08J3/03C08J11/10C08K3/06
CPCC08J3/005C08J3/03C08J2395/00C08J2419/00C08K2003/162C08K2003/166C08L95/00C08L2205/025C08L2205/035C08L19/003C08L53/02C08L91/00C08K3/16Y02W30/62
Inventor 刘力余强
Owner TIANJIN HI TECH ENVIRONMENT DEV CO LTD
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