Investigating the influence of calcium sulfate whiskers as mineral admixtures on the fatigue properties of asphalt mortar under ultraviolet aging conditions
Source abstract
Abstract
The performance degradation of asphalt mortar under ultraviolet radiation leads to asphalt pavement diseases such as cracking and potholes. In this paper, Calcium Sulfate Whiskers (CSW) was adopted to enhance the fatigue properties of asphalt mortar under ultraviolet (UV) aging conditions. Two types of asphalt (70# matrix asphalt and SBS-modified asphalt) after UV aging (5 T, 10 T, and 15 T) were adopted to prepare asphalt mortar, and three CSW content levels (10%, 30%, and 50%) were choice to substitute the mineral powder. Linear amplitude sweep test was used to evaluate the mechanical properties and damage evolution of CSW-asphalt mortar. The results showed that the effect of CSW on the damage change of mechanical properties of two asphalt mortars is different under ultraviolet aging conditions, and when the substitution rate of CSW is 50% and 10%, the mechanical properties of 70# asphalt mortar and SBS modified asphalt mortar are remarkably increased. The critical strain and critical stress are the effective indicators to assess the ultraviolet aging resistance performance of asphalt mortars. In the 0~0.05% strain levels, the damage change of CSW-70# asphalt mortar is followed the decay power function model, and that of CSW-SBS modified asphalt mortar is suitable for the viscoelastic continuum damage model. In addition, the model parameters of CSW-70# asphalt mortar and CSW-SBS modified asphalt mortar are strongly correlated with the substitution rates of CSW and UV aging times respectively.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Asphalt Pavement Performance Evaluation · Infrastructure Maintenance and Monitoring · Concrete and Cement Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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