Surface Modification of Fire retardant Asphalt with Silane Coupling Agent
CHEN Hui qiang and HAO Pei wen
DOI:10.11835/j.issn.1674-4764.2009.03.025
Received January 15, 2009,Revised , Accepted , Available online July 01, 2015
Volume ,2009,Pages 136-141
- Abstract
The theory and method of asphalt fire retardant surface modified with silane coupling agent is introduced and the optimum silane dosage is determined. The structure and performance of asphalt fire retardant before and after the surface modification is characterized through infrared spectrum and thermo gravimetric analysis. Dispersion effect of asphalt fire retardant before and after the surface modification is studied and the influence of surface modification on the hydrophilicity and lipophilicity of asphalt fire retardant is analysed contrastively. It is shown that obvious physical and chemical action occur between silane coupling agent and asphalt fire retardant, which reduce the surface polarity of asphalt fire retardant with the optimum dosage of 0.95% for the asphalt fire retardant. And Surface modification strengthens the thermal stability, dispersibility and lipophilicity of asphalt fire retardant so as to improve compatibility of asphalt and asphalt fire retardant.