Foam-induced viscosity reduction
Synergistic modification of asphalt via SAP water-release micro-foaming and WCO oil film delay improves rheological performance across high, intermediate, and low temperatures, with a controllable foaming process.
Qiao, Qicai · Gao, Yang · Zhang, Xiao · Gao, Yang · Zhang, Wenju · Su, Jinfeng · Xue, Yao
Construction and Building Materials 2025
SAP reduces viscosity via water-release-induced micro-foaming, WCO delays foaming due to oil film, synergistic viscosity reduction
At high temperatures, SAP significantly increases complex shear modulus G* and rutting factor G*/sinδ, with more pronounced improvement at higher SAP dosages
At intermediate temperatures, SAP improves fatigue factor and extends fatigue life based on LAS testing, WCO further enhances fatigue resistance
At low temperatures, WCO improves thermal cracking resistance, combined with SAP shows synergistic enhancement