Details

Autor(en) / Beteiligte

• Wang, Xiu-shan
• Fan, Tao-tao

Titel

Optimization in Process Parameters of Calcium Sulfate Whisker Modified Asphalt Using Response Surface Methodology

Ist Teil von

• Iranian journal of science and technology. Transactions of civil engineering, 2021-12, Vol.45 (4), p.2841-2851

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• To optimize the process parameters of calcium sulfate whisker (CSW) modified asphalt, the response surface methodology (RSM) was adopted to determine the optimum values of process parameters. Three influence factors, stirring time, stirring temperature, and development temperature (i.e., the temperature set by the forced-air oven to stabilize the internal structure of the modified asphalt sample after stirring), were selected to determine the process of modification. Three performances including high-temperature performance, low-temperature performance, and deformation resistance relating to the service of asphalt were analyzed as responses by testing in the Box–Behnken model. The results showed that, within the scope of this study, the optimum process parameters were stirring time of 32 min, stirring temperature of 175 °C, and development temperature of 175 °C, which have reliable accuracy compared with actual experimental results. In addition, the effect of three process parameters on asphalt performances was also researched, and it was found that stirring time has a more significant influence on the softening point, penetration at 25 °C and ductility at 10 °C interacting with other two factors.