Summary

On this paper, the consequences of partial alternative of cement by metakaolin (MK) and completely different supplementary cementitious supplies (SCMs) had been investigated on the compressive power and elasticity modulus of ultra-high-performance concrete (UHPC) at completely different ages, and the legal guidelines of the consequences of MK alone, MK and traditional SCMs on the mechanical properties of UHPC had been quantitatively analyzed on the macroscopic degree. The outcomes confirmed that the compressive power of UHPC reached the utmost worth when the MK doping quantity reached 10%, and its compressive power at 7, 28 and 90 days elevated by 21%, 28% and 18.2%, respectively. Moreover, the elasticity modulus of UHPC additionally confirmed an identical development. When MK and Blast furnace slag or Fly ash had been compounded, the mechanical properties (compressive power and elasticity modulus) of UHPC had been considerably enhanced within the later stage, exhibiting sound synergistic results. Based mostly on the experimental take a look at knowledge, a mannequin for predicting the elasticity modulus of UHPC based mostly on the change of time and SCMs was proposed with good reliability.