Self-consolidating concrete homogeneity

Authors

  • M. O. Valcuende Universidad Politécnica de Valencia (Valencia)
  • C. Parra Universidad Politécnica de Cartagena (Cartagena)
  • J. C. Jarque Instituto de Tecnología Cerámica. Universidad Jaime I de Castellón (Castellón)

DOI:

https://doi.org/10.3989/mc.2007.v57.i287.55

Keywords:

self-consolidating concrete, segregation, porosity, absorption, permeability

Abstract


Concrete instability may lead to the non-uniform distribution of its properties. The homogeneity of self-consolidating concrete in vertically cast members was therefore explored in this study, analyzing both resistance to segregation and pore structure uniformity. To this end, two series of concretes were prepared, self-consolidating and traditional vibrated materials, with different w/c ratios and types of cement. The results showed that selfconsolidating concretes exhibit high resistance to segregation, albeit slightly lower than found in the traditional mixtures. The pore structure in the former, however, tended to be slightly more uniform, probably as a result of less intense bleeding. Such concretes are also characterized by greater bulk density, lower porosity and smaller mean pore size, which translates into a higher resistance to pressurized water. For pore diameters of over about 0.5 μm, however, the pore size distribution was found to be similar to the distribution in traditional concretes, with similar absorption rates.

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Published

2007-08-30

How to Cite

Valcuende, M. O., Parra, C., & Jarque, J. C. (2007). Self-consolidating concrete homogeneity. Materiales De Construcción, 57(287), 37–52. https://doi.org/10.3989/mc.2007.v57.i287.55

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Section

Research Articles