Surface modification of fire-retardant asphalt with silane coupling agent |
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Authors: | Huiqiang Chen Boming Tang |
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Affiliation: | 1. School of Civil Engineering & Architecture, Chongqing Jiaotong Univeisity, Chongqing, 400074, China
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Abstract: | The theory and approach of the surface modified of asphalt fire-retardant with silane coupling agent were introduced. The optimum silane dosage was determined, and the structure and properties of the asphalt fire-retardant before and after the surface modification were characterized by infrared spectrum and thermo gravimetric analysis. The dispersion effect of asphalt fire-retardant was studied. The influence of the surface modification on the hydrophilicity and lipophilicity of the asphalt fire-retardant was analyzed. The experimental results showed that there were physical and chemical interactions between the silane coupling agent and the asphalt fire-retardant, which reduced the surface polarity of the asphalt fire retardant. The optimum silane coupling agent dosage was 0.95% of the asphalt fire retardant. The surface modification improved the thermal stability, dispersibility and lipophilicity of the asphalt fire retardant, which enhanced the compatibility between asphalt fire retardant and asphalt. |
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Keywords: | silane asphalt fire-retardant coupling agent surface modification |
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