Dataset: Mechanical, chemical, and thermal performance of concrete incorporating CO₂ and supplementary cementitious materials (FA and GGBS)

The dataset contains experimental data from an investigation into the combined effects of carbon dioxide (CO₂) incorporation and supplementary cementitious materials (SCMs) on concrete properties.

Six concrete mix designs were evaluated: ordinary Portland cement (OPC) control, OPC with 15% fly ash (FA) replacement, OPC with 50% ground granulated blast-furnace slag (GGBS) replacement, and their CO₂-treated counterparts. The dataset includes: - Compressive strength development data at 1, 3, 5, 7, 14, 28, and 150 days - Fresh concrete properties (slump and flow table test results) - pH evolution measurements for fresh and hardened concrete - High-temperature mass loss data (25°C to 1000°C) - Visual crack length measurements after elevated temperature exposure - Scanning electron microscopy (SEM) micrographs - Raw experimental measurements and calculated values This data supports findings on early-age strength enhancement, workability changes, thermal performance, and microstructural characteristics of CO₂-modified concrete containing SCMs.