The Influence of Alkali Activator Concentration to Mechanical Properties of Geopolymer Concrete with Trass as a Filler

Puput Risdanareni; Januarti Jaya Ekaputri; Triwulan Triwulan

doi:10.4028/www.scientific.net/MSF.803.125

Paper Titles

Properties of Self-Compacting Geopolymer Concrete
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Properties of Geopolymer Concrete from Local Fly Ash (FA) and Palm Oil Fuel Ash (POFA)
p.110

Investigation on the Degree of Reaction and Strength Performance of Fly Ash Based Geopolymer Binder with Alternative Chemical Reagents
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Effect of Solid/Liquid Ratio during Curing Time Fly Ash Based Geopolymer on Mechanical Property
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The Influence of Alkali Activator Concentration to Mechanical Properties of Geopolymer Concrete with Trass as a Filler
p.125

Characterization of Soils as Potential Raw Materials for Soil Stabilization Application Using Geopolymerization Method
p.135

Fundamentals of Geopolymers and Related Alkali Activated Materials
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Lightweight Geopolymer Binder Base on Sidoarjo Mud
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Rheology of High Volume Sidoarjo Mud Mortar
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HomeMaterials Science ForumMaterials Science Forum Vol. 803The Influence of Alkali Activator Concentration to...

The Influence of Alkali Activator Concentration to Mechanical Properties of Geopolymer Concrete with Trass as a Filler

Abstract:

This paper describes one of the varying factors influencing the mechanical properties of geopolymer concrete. Fly ash and volcanic material called trass was used as raw materials, while sodium Hydroxide (NaOH) and Sodium silicate (Na₂SiO₃) was applied as an alkali activator. Mechanical properties were assessed by compressive test, the concentration of NaOH used in this study was eight and ten Molars, and ratio of Na₂SiO₃ to NaOH by mass was 0.5, 1, 1.5, 2, and 2.5. Test results indicated that the strength of geopolymer concrete and binder were hardly influenced by concentration of NaOH in solution and the activator ratio. Binder with activator ratio of 2.5 has the highest compressive strength both in 8M and 10M NaOH system. However, in concrete, there are a few difference, concretes made with 8M NaOH and activators ratio of 2 have the highest compressive strength. This result might due to the low workability of fresh geopolymer concrete. On the other hand, binder and concrete made with 10M NaOH, showed the highest compressive strength when they were made with the activator ratio of 2,5.

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Periodical:

Materials Science Forum (Volume 803)

Pages:

125-134

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.803.125

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Online since:

August 2014

Authors:

Puput Risdanareni*, Januarti Jaya Ekaputri, Triwulan Triwulan

Keywords:

Compressive Strength, Fly Ash (FA), Geopolymer, Naoh Concentration, Ratio Na₂SiO₃ /NaOH, Trass

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