Open AccessPerformance of local fly ash geopolymers under different types of acids
Author(s) -
Dumitru Doru Burduhos-Nergis,
Petrică Vizureanu,
Liviu Andrușcă,
Dragoş Cristian Achiţei
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/572/1/012026
Subject(s) - fly ash , geopolymer , materials science , compressive strength , portland cement , sulfuric acid , microstructure , raw material , composite material , ceramic , cement , chemical engineering , metallurgy , chemistry , organic chemistry , engineering
A new class of ceramic materials, known as geopolymers, possess comparable or even higher mechanical and chemical properties than ordinary Portland cement-based materials. Because geopolymers can be used in a wide variety of areas, from civil engineering applications to decorative objects manufacturing, they can get in contact with different types of acidic corrosive substances. The degradation degree depends mostly on the acidic solution concentration and the exposure time. Due to the interaction between the geopolymer compounds, Al, Si and Fe ions solubility and the corrosive environment substance, there may follow severe consequences on the material mechanical properties. These consequences are highly related to the geopolymers three-dimensional structure degeopolymerization. The performance of geopolymers under severe environmental condition depends on the raw material, mineralogical composition and activation method. The aim of this paper is to present the effects of nitric acid, sulfuric acid and hydrochloric acid exposure on the local fly ash geopolymers compressive strength and microstructure.