Experimental and computational figure-source data for polyurethane prepolymer-modified asphalt and recycled asphalt mixtures

This dataset contains 21 Origin project files and CSV exports of 37 worksheets associated with the study of polyurethane prepolymer-modified asphalt and recycled asphalt mixtures. The files cover binder properties, rheological curves, FTIR spectra, reaction-energy profiles, and mixture performance results. The collection includes processed results, auxiliary analysis outputs, and image-digitized coordinates. It is not a complete archive of raw instrument measurements or primary simulation outputs. The accompanying README, file manifest, column dictionary, and audit documentation describe file contents, provenance, coverage, and known limitations. This version adds supplemental figures S1–S4, covering representative asphalt molecular structures, the base asphalt simulation cell, representative PUP–asphaltene-phenol reaction configurations, and storage and loss modulus master curves. The corresponding GitHub repository is currently private. Files in this Zenodo record are restricted during manuscript preparation and peer review. Access for editors and reviewers can be provided through a private sharing link.