Dataset on hydration, microstructure, mechanical performance and environmental impacts of Portland cement incorporating waste-derived ferrous sulfate

This dataset contains raw and processed experimental data supporting the study of Portland cement systems incorporating waste-derived ferrous sulfate hydrates (FeSO₄·xH₂O) as a partial replacement for natural gypsum. The data were generated to characterize hydration behavior, phase evolution, microstructural development, mechanical performance, chromium reduction behavior, and environmental impacts associated with alternative sulfate regulation in ordinary Portland cement.

The dataset includes raw X-ray diffraction (XRD) patterns and Rietveld refinement outputs for identifying and quantifying hydration phases, thermogravimetric (TG/DTG) datasets for evaluating mass-loss events associated with AFt/AFm phases, portlandite, and carbonates, and scanning electron microscopy (SEM) images documenting microstructural features at early curing ages. Chemical composition data obtained by XRF and ICP-OES are provided for raw materials and unhydrated binders. Mechanical performance data include raw compressive strength results measured at 3, 7, 14, and 28 days, as well as Vicat initial and final setting-time measurements. Additional datasets include soluble Cr(VI) concentration measurements and life-cycle inventory data used for cradle-to-gate environmental assessment.

All data are organized into clearly labeled folders corresponding to each experimental technique. The dataset is intended to support reproducibility, enable reanalysis using alternative modeling or analytical approaches, and facilitate comparative studies on sulfate-regulating additives, waste-derived cement components, and low-carbon cement systems.