Effect of Fibre and Microsilica Incorporation on High Temperature Resistance of Cementitious Complex Binder

  • Regina KALPOKAITĖ-DIČKUVIENĖ Lithuanian Energy Institute
  • Kristina BRINKIENĖ Lithuanian Energy Institute
  • Jūratė ČĖSNIENĖ Lithuanian Energy Institute
  • Algis MAKŠTYS Lithuanian Energy Institute
Keywords: microfibre, cold crushing strength, binder, XRD, shrinkage, density


Complex binder reinforced with microfibre produced from waste catalyst was investigated. Influence of 1, 3 and 5 % of fibre as well as 5 % of microsilica on the mechanical strength of complex binder after thermal treatment at 600, 800 and 1000 °C temperature was analyzed. According to the experimental results reinforcement with 1 % of fibre had advantage on mechanical strength of complex binder up to 800 °C, meanwhile 5 % of fibre resulted in the lowest values of strength in all firing temperature range. The strength of dry samples was improved with microsilica incorporation. But above 800 °C temperature cold crushing strength as well as thermal shrinkage of binder reinforced with fibre and microsilica was lower in comparison with ordinary complex binder at 1000 °C.