The article is focused on spun concrete made with different chemical admixtures under long-term exposure to aggressive salt-saturated ground water and a cyclic temperature gradient. Over a long-term experimental investigation, 64 prismatic spun concrete specimens were subjected to multicycle (75-120) processing under combined aggressive ambient conditions. Prismatic specimens were soaked in water or saline and dried at a temperature of 45-50 °C. The long-term multi-cycle effect of the temperature gradient and physical salt attack on the compressive strength, Young's modulus and durability of concrete was found to be negative. Chemical admixtures, though, improved the structure of spun concrete, thus having a significant positive effect on its physical-mechanical properties and durability.
Keywords: PSA; chemical admixtures; cyclic wetting-drying; durability; spun concrete; temperature.