The Effect of Alkaline Activator Ratio on the Compressive Strength of Fly Ash-Based Geopolymer Paste

International Conference on Innovative Research - ICIR Euroinvent 2017

Lzrescu, A.V.^1 ; Szilagyi, H.^2 ; Baer, C.^3 ; Ioani, A.^1

Technical University of Cluj-Napoca, Romania^1

N.I.R.D. URBAN-INCERC, Cluj-Napoca Branch, Romania^2

N.I.R.D. URBAN-INCERC, Timioara Branch, Romania^3

关键词: Alkaline activation;    Alkaline activators;    Geopolymer;    Material sources;    Mix designs;    NaOH solutions;    Romanians;    Solid material;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/209/1/012064/pdf
DOI  :  10.1088/1757-899X/209/1/012064

来源: IOP

【 摘 要 】

Alkaline activation of fly ash is a particular procedure in which ash resulting from a power plant combined with a specific alkaline activator creates a solid material when dried at a certain temperature. In order to obtain desirable compressive strengths, the mix design of fly ash based geopolymer pastes should be explored comprehensively. To determine the preliminary compressive strength for fly ash based geopolymer paste using Romanian material source, various ratios of Na2SiO3solution/ NaOH solution were produced, keeping the fly ash/alkaline activator ratio constant. All the mixes were then cured at 70 °C for 24 hours and tested at 2 and 7 days, respectively. The aim of this paper is to present the preliminary compressive strength results for producing fly ash based geopolymer paste using Romanian material sources, the effect of alkaline activators ratio on the compressive strength and studying the directions for future research.