Farfan Salas, Yhon, and Tulio Edgar Guillén Sheen. 2025. “Analysis of the Compressive Strength of Concrete f´c=210kg Cm2 With the Addition of Natural Polymer Ash (CBCA)”. LACCEI 1 (12). https://doi.org/10.18687/LACCEI2025.1.1.1013.