Long-Term Deformation Properties of a Carbon-Fiber-Reinforced Alkali-Activated Cement Composite

• Published in: Mechanics of composite materials 2020-03, Vol.56 (1), p.85-92
• Main Authors: Gailitis, R., Sliseris, J., Korniejenko, K., Mikuła, J., Łach, M., Pakrastins, L., Sprince, A.
• Format: Article
• Language: English
• Subjects: Activated carbon; Analysis; Carbon; Carbon fiber reinforced concretes; Cement; Cement reinforcements; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Composite materials; Composites; Concrete; Creep (materials); Fiber composites; Glass; Materials Science; Modulus of elasticity; Natural Materials; Portland cements; Properties (attributes); Solid Mechanics; Tensile stress; Time dependence
• ISSN: 0191-5665; 1573-8922
• DOI: 10.1007/s11029-020-09862-w

The aim of this study was to experimentally determine the creep and shrinkage properties of plain geopolymer and carbon-fiber-reinforced geopolymer concretes. The creep properties of concrete specimens were determined by loading them by 20% of their ultimate stress. The specific creep of the geopolymer concrete was in the same range as that of the ordinary Portland cement — 0.00065 1/MPa. New information on the time-dependent elastic modulus of the concretes was also obtained. The elastic modulus of the plain geopolymer concrete reached, on the average, 32.03 GPa on day 30, 36.29 GPa on day 62, and 45.73 GPa on day 158, but that of the carbon-fiber-reinforced one — 30.12 GPa on day 30, 37.79 GPa on day 62, and 53.35 GPa on day 158 after the production of their specimens.