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This research presents the results of the mechanical and microstructural evaluation of Portland composite (CPC-30R) that have exceeded its recommended storage period by more than 2 years. CubicCubic specimens of 5 × 5 × 5 cm were prepared using a water/cementCement ratio of 0.485, in order to compare its compressive strengthCompressive strength with respect to a recently produced cementCement. After 28 days of curing, the cementCement under optimal conditions reached an average strengthStrength of 298.5 kg/cm2, while the cementCement with extended storage time showed a significantly lower strengthStrength of 44.2 kg/cm2. In addition, both materials were characterized by X-ray diffraction (XRDX-Ray Diffraction (XRD)) and Elemental AnalysisElemental analysis with Digital Microscopes Using Laser-Induced Breakdown Spectroscopy (LIBS), identifying structural and morphological differences that explain the decrease in compressive strengthCompressive strength of the out-of-date cementCement.

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Mechanical and Microstructural Performance Evaluation of Portland Cement (CPC-30R) Out of Date

  • 会议论文

  • 发表日期：

    2026年

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  • Monserrat Villeda Flores,
  • Hugo García Ortiz,
  • Francisco Omar Lagarda García,
  • Elizabeth Lozada Amador,
  • Marco Antonio Escamilla García,
  • María del Rosario Dolores Mijangos

摘要

This research presents the results of the mechanical and microstructural evaluation of Portland composite (CPC-30R) that have exceeded its recommended storage period by more than 2 years. CubicCubic specimens of 5 × 5 × 5 cm were prepared using a water/cementCement ratio of 0.485, in order to compare its compressive strengthCompressive strength with respect to a recently produced cementCement. After 28 days of curing, the cementCement under optimal conditions reached an average strengthStrength of 298.5 kg/cm2, while the cementCement with extended storage time showed a significantly lower strengthStrength of 44.2 kg/cm2. In addition, both materials were characterized by X-ray diffraction (XRDX-Ray Diffraction (XRD)) and Elemental AnalysisElemental analysis with Digital Microscopes Using Laser-Induced Breakdown Spectroscopy (LIBS), identifying structural and morphological differences that explain the decrease in compressive strengthCompressive strength of the out-of-date cementCement.