Effect of superplasticizer on the strength of fly ash based geopolymer concrete

Authors

  • Rhem Leoric Cantos Dela Cruz De La Salle University, Gokongwei College of Engineering, Department of Civil Engineering, 8/F Bro. Andrew Gonzalez FSC Hall, 2401 Taft Avenue, 1004 Manila, Philippines
  • Leah Monica Alaurin Roriguez De La Salle University, Gokongwei College of Engineering, Department of Civil Engineering, 8/F Bro. Andrew Gonzalez FSC Hall, 2401 Taft Avenue, 1004 Manila, Philippines
  • Emmanuel Josh Yambing Tiongco De La Salle University, Gokongwei College of Engineering, Department of Civil Engineering, 8/F Bro. Andrew Gonzalez FSC Hall, 2401 Taft Avenue, 1004 Manila, Philippines
  • Khim Denize Asilo Yulas De La Salle University, Gokongwei College of Engineering, Department of Civil Engineering, 8/F Bro. Andrew Gonzalez FSC Hall, 2401 Taft Avenue, 1004 Manila, Philippines
  • Jason Maximino Ongpeng De La Salle University, Gokongwei College of Engineering, Department of Civil Engineering, 8/F Bro. Andrew Gonzalez FSC Hall, 2401 Taft Avenue, 1004 Manila, Philippines

DOI:

https://doi.org/10.14311/APP.2022.33.0119

Keywords:

alkali activators, color detection, fly ash based geopolymer concrete, MATLAB, polycarboxylate based superplasticizer, ultrasonic pulse velocity test

Abstract

In this research, the effect of a polycarboxylate based superplasticizer on the strength of Geopolymer Concrete (GPC) was investigated. A fixed amount of superplasticizer (1.5 % of Fly Ash weight) was utilized along with alkali activators Sodium Hydroxide (NaOH) and Sodium Silicate (Na2SiO3). The Ultrasonic Pulse Velocity Test determined the strength development of concrete. The quality of the GPC improved when a higher concentration of alkali activator was applied based on the Concrete Quality Designation. In detecting the color development of GPC, samples were put through MATLAB and specimens became lighter as time passes due to dehydration (a process where water escapes from the sample). Stress strain diagrams were generated which generally indicate that GPC specimens are ductile. The researchers were able to assess the workability of the mix designs using a rating from 1 to 5, with 1 being the least workable and 5 being the most workable.

Downloads

Download data is not yet available.

Downloads

Published

2022-03-03

How to Cite

Dela Cruz, R. L. C. ., Roriguez, L. M. A. ., Tiongco, E. J. Y., Yulas, K. D. A. ., & Ongpeng, J. M. . (2022). Effect of superplasticizer on the strength of fly ash based geopolymer concrete. Acta Polytechnica CTU Proceedings, 33, 119–124. https://doi.org/10.14311/APP.2022.33.0119

Issue

Vol. 33 (2022): fib International Conference on Concrete Sustainability

Section

Articles