Microstructural Analysis of Ambient Cured Phosphate Based-Geopolymerswith Coal-Ash as Precursor

Archives of Metallurgy and Materials

article

D.D. Burduhos Nergis¹  P. Vizureanu¹  S. Lupescu¹  D.P. Burduhos Nergis¹  M.C. Perju¹  A.V. Sandu¹ 

[1] Gheorghe Asachi” Technical University of Iasi;Universiti Malaysia Perlis ,(UniMAP), Center of Excellence, Geopolymer & Green Technology ,(CeGeoGTech), School of Material Engineering

关键词: Acid activation;    coal ash;    microstructural analysis;    phosphate based geopolymers;   

DOI  :  10.24425/amm.2022.137795

学科分类：物理（综合）

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

An alternative for Ordinary Portland cement (OPC) consumption is the production and integration of green cement. In otherwords, the clinker consumption has to be replaced with new low-carbon binders. A possible solution was introduced by the geopolymerisation technology. However, the alkaline activation of geopolymers offers the possibility of obtaining greener materials withhigh properties, superior to OPC, but due to the high price of sodium silicate, their industrial use is limited. In the past few years,a new activator has been discovered, namely phosphoric acid. This study approaches the obtaining of coal ash-based geopolymersactivated with acid solution cured at room temperature. Accordingly, phosphoric acid, 85% by mass, was diluted in distilled waterto obtain a corresponding activation solution for H3PO4/Al2O3 ratio of 1.0 and two types of geopolymers were ambient cured(22°C ±2°C). Moreover, to evaluate the geopolymerisation potential of this system (coal ash – phosphoric acid), SEM and EDSanalysis was performed to investigate their morphologic characteristics.

【 授权许可】

CC BY-NC