The modulus of elasticity Ec, the specified compressive strength fc', the ultimate concrete strength, fcr', and the axial deformation of the concrete at peak strength εc0 are key parameters for the analysis, design, and construction of reinforced concrete (RC) structures. These parameters require precise laboratory control, which makes routine testing and consistent reporting in the literature challenging. Therefore, in some developing countries, numerical modeling for RC structural analysis relies on results or equations proposed by international building codes as reference values, ignoring the mechanical contribution of locally available materials. This study used five gravel sources from different mineralogical origins in Colombia to present the mechanical properties of twenty concrete mixtures at four water/cement ratios (0.60, 0.55, 0.49, 0.35). The variables of interest include aggregate properties, modulus of elasticity, and compressive strength of the concrete. Statistical analysis was conducted to develop expressions that characterized the behavior of concrete produced with local aggregates in Colombia and were also compared against results for other countries with similar aggregate types. The results suggest that the concrete modulus equation of the local building code underestimates the results obtained with local aggregates by approximately 13% calculate with fcr' and 18% with fc'.