Preparation of an SBS Latex–Modified Bitumen Emulsion and Performance Assessment
Preparation of an SBS Latex–Modified Bitumen Emulsion and Performance Assessment
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DOI：
10.1080/10916460902939436
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发表时间：
2010-05
影响因子：
1.5
通讯作者：
H. Cai;T. Wang;Jian Zhang;Yahe Zhang
中科院分区：
文献类型：
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作者：
H. Cai;T. Wang;Jian Zhang;Yahe Zhang
摘要 为解决苯乙烯-丁二烯-苯乙烯(SBS)改性沥青乳液稳定性与SBS浓度之间的矛盾，提出了一种SBS乳液的制备方法。结果表明，SBS乳液具有良好的稳定性能和性能。乳化剂浓度对储存稳定性的影响表明，当乳化剂重量浓度为1.0%时，SBS胶乳改性沥青乳液（SBS-LMBE）的稳定性达到最大，并且在沥青乳液中添加SBS胶乳增加了乳化难度。 SBS胶乳对沥青性能的影响表现为针入度降低，而5℃软化点和延度升高，这说明SBS胶乳对沥青性能起到了改善作用。与基础沥青相比，SBS-LMBE蒸发残渣的饱和度和芳香度有所降低。然而，树脂和沥青质增加。分析沥青的成分与性能的关系表明，SBS胶乳引起的成分变化有利于沥青的性能。胶体指数（CI）表明SBS乳胶还使胶体体系更加稳定。
Abstract For resolving the contradiction of the stability between styrene-butadiene-styrene (SBS)-modified bitumen emulsion and the concentration of SBS, a method of preparing SBS latex is provided in this article. Results showed that SBS latex had good stability properties and performance. The effect of emulsifier concentration on the storage stability showed that the maximum stability of SBS latex–modified bitumen emulsion (SBS-LMBE) was obtained at emulsifier weight concentration 1.0% and addition of SBS latex to bitumen emulsion enhanced the difficulty of emulsification. The effects of SBS latex on bitumen properties showed the penetration decreased, whereas the softening point and ductility at 5°C increased, which means that SBS latex plays a role in improving the properties of bitumen. Compared to the base bitumen, saturate and aromatic of evaporation residue of SBS-LMBE decreased. However, resin and asphaltene increased. Analysis of the relationship between the components and properties of bitumen showed that the components change caused by SBS latex was beneficial to the properties of bitumen. The colloidal index (CI) showed that SBS latex also made the colloidal system more stable.