Alkaline Activator Impact on the Geopolymer Binders

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Blaszczyski, Tomasz Z.^1 ; Król, Maciej R.^2

Technical University of Pozna, Piotrowo 5, Pozna

60-965, Poland^1

Technical University of Koszalin, niadecki 2, Koszalin

75-453, Poland^2

关键词: Alkaline activators;    Alkaline hydroxide;    Alkaline reaction;    Basic parameters;    Chemical compositions;    Combustion of coal;    Geopolymer binders;    Geopolymer materials;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/2/022036/pdf
DOI  :  10.1088/1757-899X/245/2/022036

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Concrete structures are constantly moving in the direction of improving the durability. Durability depends on many factors, which are the composition of concrete mix, the usage of additives and admixtures and the place, where material will work and carry the load. The introduction of new geopolymer binders for geopolymer structures adds a new aspect that is type of used activator. This substance with strongly alkaline reaction is divided because of the physical state, the alkaline degree and above all the chemical composition. Taking into account, that at present the geopolymer binders are made essentially from waste materials or by-products from the combustion of coal or iron ore smelting, unambiguous determination of the effect of the activator on the properties of the geopolymer material requires a number of trials, researches and observation. This paper shows the influence of the most alkaline activators on the basic parameters of the durability of geopolymer binders. In this study there were used highly alkaline hydroxides, water glasses and granules, which are waste materials in a variety of processes taking place in chemical plants. As the substrate of geopolymer binders there were used fly ash which came from coal and high calcareous ash from the burning of lignite.