Effect of Superplasticizers on Workability of Fly Ash Based Geopolymer

Abstract

See, stats, and : https : / / www . researchgate. net / publication / 263084806 Effect Ash Chapter DOI : 10 . 1007 / 978 - 981 - 4585 - 02 - 6_61 CITATIONS 5 READS 294 2 , including : Some : Fiber - Reinforced - Hardening (SHGC) View 3D Behzad Swinburne 36 SEE All . The . Abstract This paper evaluates the effect of different commercial superplasticizers (SPs) usually used for ordinary Portland cement concrete production such as naphthalene , melamine (second generation of products) and modified Polycar - boxylate based (latest generation) on the workability of a class F fly ash paste activated by 8 M NaOH solution (28 . 6 %) ? Na 2 SiO 3 (71 . 4 %) with a SiO 2 / Na 2 O ratio of 2 . 0 . These SPs at a dosage of 1 % by mass of fly ash were added to the fresh paste and flowability of the activated fly ash paste was measured by mini slump test and compared with that of the paste without using any SP . The experimental results indicated that each SP affected the workability of the fly ash geopolymer differently . When the NaOH ? Na 2 SiO 3 used as the activator the modified Polycarboxylate based SPs (latest generation) was the most efficient type which increased the relative slump of the paste up to 45 % with reference to the paste without using any SP .