Now showing items 1-4 of 4

  • Collective versus hub activation of epidemic phases on networks 

    Ferreira, Silvio C.; Salvador, Renan; Pastor Satorras, Romualdo (AMER PHYSICAL SOC, 2016-03-14)
    Article
    Restricted access - publisher's policy
    We consider a general criterion to discern the nature of the threshold in epidemic models on scale-free (SF) networks. Comparing the epidemic lifespan of the nodes with largest degrees with the infection time between them, ...
  • Effect of cement composition on the reactivity of alkali-free accelerating admixtures for shotcrete 

    Salvador, Renan; Pialarissi Cavalaro, Sergio Henrique; Rueda Alba, Angel Julian; Domingues de Figueiredo, Antonio (2014)
    Conference report
    Restricted access - publisher's policy
    The evolution of mechanical strength in cement matrices is strongly dependent on cement properties and on the admixtures used. Limestone additions and accelerators, used in shotcrete, alter the hydration mechanisms of the ...
  • Influence of spraying on the early hydration of accelerated cement pastes 

    Salvador, Renan; Pialarissi Cavalaro, Sergio Henrique; Cano, Miguel; Domingues de Figueiredo, Antonio (2016-10)
    Article
    Open Access
    In practice, most of the studies about the interaction between cement and accelerators is performed with hand-mixed pastes. However, in many applications mixing occurs through spraying, which may affect accelerators ...
  • Parameters controlling early age hydration of cement pastes containing accelerators for sprayed concrete 

    Salvador, Renan; Pialarissi Cavalaro, Sergio Henrique; Cincotto, Maria Alba; Domingues de Figueiredo, Antonio (2016-11)
    Article
    Open Access
    The objective of this work is to parametrize the early age hydration behavior of accelerated cement pastes based on the chemical properties of cement and accelerators. Eight cements, three alkali-free and one alkaline ...