THE INFLUENCE OF A SHRINKAGE REDUCING ADMIXTURE ON THE LONG-TERM DEVELOPMENT OF DYNAMIC PROPERTIES IN ALKALI-ACTIVATED SLAG

Authors

  • Martin Alexa
  • Dalibor Kocáb
  • Barbara Kucharczyková
  • Jan Kotrla

DOI:

https://doi.org/10.14311/APP.2019.22.0001

Keywords:

alkali-activated slag, dynamic modulus of elasticity, ultrasonic pulse velocity test, resonance method

Abstract

The paper investigates the way a shrinkage-reducing admixture affects the long-term development of dynamic properties in mortars made with alkali-activated slag (AAS). Two AAS mortars were tested - one contained a shrinkage-reducing admixture, the other did not. The specimens (prisms of 40 × 40 × 160mm) were observed for changes in the dynamic modulus of elasticity at ages of 3 days through 2 years using the ultrasonic pulse velocity test and the resonance method. Even though the statistical analysis of the results gave no proof that the shrinkage-reducing admixture affected the final values, the development of the elastic modulus appeared to follow a very interesting trend which is completely different from trends commonly observed in cement-based composites.

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Published

2019-07-25

Issue

Vol. 22 (2019): SPECIAL CONCRETE AND COMPOSITES 2018

Section

Articles

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