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劉    海

（ 河南交投鄭平高速公路有限公司 ，河南 鄭州 450000)

摘   要 ：為研究納米 TiO₂、TLA 對(duì) SBS 改性瀝青及其混合料性能的影響，確定最優(yōu)組合方案，通過(guò)針入度、軟化點(diǎn)、延度、黏度 、剪切流變及彎曲流變等試驗(yàn)，研究復(fù)合改性瀝青的常規(guī)性能及高低溫流變性能，并對(duì)復(fù)合改性瀝青混合料的路用性能進(jìn)行評(píng)價(jià)分析。結(jié)果表明：TLA 或納米 TiO₂ 摻入后會(huì)降低 SBS 改性瀝青針入度和延度，提高軟化點(diǎn)和黏度，其中 TLA 影響較大，且 TLA 摻量不宜大于25% ;  納米 TiO₂ 可提高瀝青膠結(jié)料的高溫抗剪切變形能力，但同時(shí)降低瀝青膠結(jié)料低溫流變性能，其摻量不宜超過(guò) 2% ;  TLA 和納米 TiO₂ 在提高瀝青混合料抗高溫車(chē)轍能力和抗水損害性能方面效果顯著，但同時(shí) TLA 會(huì)明顯降低其低溫性能，納米 TiO₂ 影響很小。考慮綜合性能推薦2% 納米 TiO₂ 、25% 的 TLA 的組合為最優(yōu)方案。

關(guān)鍵詞：納米 TiO₂ ;  湖瀝青  (TLA) ;  SBS 改性瀝青 ；瀝青混合料 ；路用性能

中圖分類(lèi)號(hào)：U414           

文獻(xiàn)標(biāo)志碼：A            

文章編號(hào)： 1005- 8249   (2024)  05- 0121- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.05 .022

LIU Hai

(Henan Jiaotou Zhengping Highway Co. ，Ltd. ，Zhengzhou 450000 ,  China)

Abstract: In order to study the effect of nano-TiO2 and TLA on the performance of SBS modified asphalt and its mixture, and determine the optimal combination scheme, the conventional performance and high and low temperature rheological properties of composite modified asphalt were studied by using penetration, softening point, ductility, viscosity, shear rheology and bending rheology tests, and the road performance of composite modified asphalt mixture was evaluated and analyzed. The results show that the incorporation of TLA or nano-TiO2 will reduce the penetration and ductility of SBS modified asphalt, and increase the softening point and viscosity. Among them, TLA has a great influence, and the content of TLA should not be more than 25 %. Nano-TiO2 can improve the high temperature shear deformation resistance of asphalt binder, but at the same time reduce the low temperature rheological properties of asphalt binder, and its content should not exceed 2 %. TLA and nano-TiO2 have significant effects on improving the high temperature rutting resistance and water damage resistance of asphalt mixture, but at the same time, TLA will significantly reduce its low temperature performance, and nano-TiO2 has little effect. Considering the comprehensive performance, the combination of 2% nano-TiO2 and 25 % TLA is recommended as the optimal solution.

Keywords: nano TiO2; lake asphalt (TLA); SBS modified asphalt; asphalt mixture; road performance

作者簡(jiǎn)介：劉    海  (1979—) , 男，本科，高級(jí)工程師，研究方向：路橋施工。

收稿日期：2023- 03- 14