布敦岩沥青与SBR复合改性乳化沥青制备及性能研究

Research on Preparation and Properties of Buton Rock Asphalt and SBR Composite Modified Emulsified Asphalt

文章采用先改性后乳化、边乳化边改性和先乳化后改性三种不同方法制备布敦岩沥青与SBR复合改性乳化沥青,通过储存稳定性、蒸发残留物含量、粒度分析等试验确定三种不同制备方法对布敦岩沥青与SBR复合改性乳化沥青的适用性;选用最佳方法制备不同布敦岩沥青掺量的布敦岩沥青与SBR复合改性乳化沥青,并通过沥青基本性质、布氏黏度、DSR试验对采用低温蒸残方式获取的蒸发残留物进行性能评价,探索布敦岩沥青对SBR改性乳化沥青高温性能的提升效果及其最佳掺量。试验结果表明:通过边改性边乳化方法制备的布敦岩沥青与SBR复合改性乳化沥青沥青含量高、储存稳定性好、颗粒均匀,加入布敦岩沥青的SBR改性乳化沥青的高温性能显著提升,3%掺量时综合性能最佳。

This article respectively prepares Buton rock asphalt and SBR composite modified emulsified asphalt by three methods:modification before emulsification,emulsification while modification,and emulsification before modification,and conducts the storage stability,evaporation residue content and particle size analysis experiments to determine the suitability of three different preparation methods for Buton rock asphalt and SBR composite modified emulsified asphalt;it selects the best method to prepare Buton rock asphalt and SBR composite modified emulsified asphalt with different Buton rock asphalt content,and evaluates the performance of evaporation residue obtained by low temperature residue evaporation method through the basic asphalt properties,Brookfield viscosity and DSR test,and discusses the improvement effect of Buton rock asphalt on high temperature performance of SBR modified emulsified asphalt as well as its optimum dosage.The test results show that Buton rock asphalt and SBR composite modified emulsified asphalt prepared by the method of modification while emulsification have high asphalt content,with good storage stability and uniform particles,and the high temperature performance of SBR modified emulsified asphalt after adding the Buton rock asphalt is significantly improved,with the best comprehensive performance at 3% dosage.