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A platform for research: civil engineering, architecture and urbanism
Preparation and anti-icing properties of a hydrophobic emulsified asphalt coating
Highlights Hydrophobic anti-icing emulsified asphalt was prepared. The effect of hydrophobic agent roughness, dosage and incorporation method on hydrophobic effect was analyzed. Anti-icing and anti-skidding properties of hydrophobic coating were tested. An indoor simulated anti-icing test was designed and the evaluation criteria for anti-icing performance were proposed. The adhesion and durability between hydrophobic coating and asphalt pavement were improved by interfacial agent.
Abstract Icing on asphalt pavement may lead to potential hazards for driving safety. To reduce the security risk, this paper aims at preparing a hydrophobic emulsified asphalt coating on asphalt pavement by adding a hydrophobic agent (HPA, Polytetrafluoroethylene powder) to emulsified asphalt. Considering the factors influencing hydrophobic effect, such as roughness of hydrophobic agent, dosage and incorporation method, the ice-repellency of hydrophobic emulsified asphalt coating was characterized by means of contact angle. It was found the hydrophobic properties of emulsified asphalt were significantly affected by roughness, dosage and incorporation methods of HPA and the highest contact angle was 94.3° when the HPA with 1250 meshes and dosage of 15% was added by the external addition method. Through the interlayer shear test and the indoor anti-icing test, hydrophobic asphalt pavement could reduce the bond strength between pavement and ice so that the ice layer could be easily broken and cleared, and the bond strength could be reduced by about 40% at 0.3 kg/m2 dosage of hydrophobic emulsified asphalt. It was proved that the skid resistance performance of the hydrophobic emulsified asphalt coating could conform to the requirements of the specification. The addition of interfacial agent can significantly improve the adhesion between emulsified asphalt and aggregates. These findings demonstrated the potential of using hydrophobic emulsified asphalt coating on highways in adverse weather to provide better anti-icing performance and contribute to traffic safety in winter.
Preparation and anti-icing properties of a hydrophobic emulsified asphalt coating
Highlights Hydrophobic anti-icing emulsified asphalt was prepared. The effect of hydrophobic agent roughness, dosage and incorporation method on hydrophobic effect was analyzed. Anti-icing and anti-skidding properties of hydrophobic coating were tested. An indoor simulated anti-icing test was designed and the evaluation criteria for anti-icing performance were proposed. The adhesion and durability between hydrophobic coating and asphalt pavement were improved by interfacial agent.
Abstract Icing on asphalt pavement may lead to potential hazards for driving safety. To reduce the security risk, this paper aims at preparing a hydrophobic emulsified asphalt coating on asphalt pavement by adding a hydrophobic agent (HPA, Polytetrafluoroethylene powder) to emulsified asphalt. Considering the factors influencing hydrophobic effect, such as roughness of hydrophobic agent, dosage and incorporation method, the ice-repellency of hydrophobic emulsified asphalt coating was characterized by means of contact angle. It was found the hydrophobic properties of emulsified asphalt were significantly affected by roughness, dosage and incorporation methods of HPA and the highest contact angle was 94.3° when the HPA with 1250 meshes and dosage of 15% was added by the external addition method. Through the interlayer shear test and the indoor anti-icing test, hydrophobic asphalt pavement could reduce the bond strength between pavement and ice so that the ice layer could be easily broken and cleared, and the bond strength could be reduced by about 40% at 0.3 kg/m2 dosage of hydrophobic emulsified asphalt. It was proved that the skid resistance performance of the hydrophobic emulsified asphalt coating could conform to the requirements of the specification. The addition of interfacial agent can significantly improve the adhesion between emulsified asphalt and aggregates. These findings demonstrated the potential of using hydrophobic emulsified asphalt coating on highways in adverse weather to provide better anti-icing performance and contribute to traffic safety in winter.
Preparation and anti-icing properties of a hydrophobic emulsified asphalt coating
Han, Sen (author) / Yao, Tengfei (author) / Yang, Xiaofei (author)
Construction and Building Materials ; 220 ; 214-227
2019-06-03
14 pages
Article (Journal)
Electronic Resource
English