WER-SBR复合改性乳化沥青的微表处性能及机理研究

Micro-surfacing Performance and Mechanism of WER-SBR Composite Modified Emulsified Asphalt

摘要:

为提升微表处混合料的整体性能，采用水性环氧树脂（WER）与丁苯橡胶（SBR）复配制备了高性能改性乳化沥青并研究了其传统物理性能、相容性及微观改性机理，探讨了微表处混合料的耐久性。结果表明：WER和SBR的协同效应提高了乳化沥青的传统物理性能，三者之间具有良好的相容性；WER与SBR的最佳掺量分别为15%和3%；复合改性微表处混合料的抗水损、耐磨耗及抗剪性能均显著优于单一改性混合料，表明WER协同SBR充分发挥了其互补增效的优势；复合改性乳化沥青未出现新的吸收峰，表明WER体系、SBR以及乳化沥青之间为物理共混。

Abstract:

To enhance the overall performance of micro-surfacing mixtures， a high-performance modified emulsified asphalt was prepared through the compounding of waterborne epoxy resin（WER） and styrene-butadiene rubber（SBR）. Its traditional physical properties， compatibility， and microscopic modification mechanism were studied， along with an exploration into the durability of the micro-surfacing mixture. The results indicate that the synergistic effect of WER and SBR improves the traditional physical properties of emulsified asphalt， demonstrating good compatibility among the three components. The optimal dosages of WER and SBR are 15% and 3%， respectively. The compound-modified micro-surfacing mixture exhibites significantly superior resistance to water damage， wear， and shear compared to single-modified counterparts， suggesting that WER synergistically combined with SBR fully leverages their complementary and synergistic advantages. No new absorption peak appears in the composite modified emulsified asphalt， indicating that WER system， SBR， and emulsified asphalt are physically blended.