Quality Control parameters for on-site evaluation of pumped Self-Compacting Concrete Articles uri icon

authors

  • BARLUENGA, G.
  • GIMENEZ, M.
  • RODRIGUEZ LOPEZ, ANGEL JOSE ALFREDO
  • RIO, O.

publication date

  • November 2017

start page

  • 1112

end page

  • 1120

volume

  • 154

International Standard Serial Number (ISSN)

  • 0950-0618

abstract

  • An experimental study comprising laboratory and real scale tests was carried out to evaluate the usefulness of several pumping, early age and hardened parameters for pumped Self-Compacting Concrete (SCC) quality control. Two pumped SCC, with fly ash and limestone filler, were tested. Pumpability was controlled online by real-time measuring of pumping pressure and discharge rate. Temperature, capillary pressure, dimensional stability and P-wave ultrasonic pulse transmission (UPV) were measured simultaneously to monitor microstructure evolution at early age (EA). UPV (P- and S-waves) were also used as non-destructive testing method for hardened quality control. Pumping reduced compressive strength between 12 and 16% and changed air permeability, although did not modify porosity accessible to water. These Quality Control Parameters (QCP) showed their ability to detect the changes on material"s pumping, EA and hardened performance. Accordingly, they can be used to establish acceptance limits and to identify potential issues arising from undesired changes in material"s properties.

keywords

  • quality control; pumping; self-compacting concrete; full scale test; early age; ndt