Effect of curing environment on length changes of alkali-activated slag/cement kiln by-pass dust mixtures

International Conference Building Materials, Products and Technologies

材料科学;工业技术（总论）

Bilek, V.^1^2 ; Kalina, L.^1 ; Simonova, H.^2

University of Technology, Faculty of Chemistry, Institute of Materials Science, Purkyova 118, Brno

61200, Czech Republic^1

University of Technology, Faculty of Civil Engineering, Institute of Structural Mechanics, Vevei 331/95, Brno

60200, Czech Republic^2

关键词: Alkali activated slags;    Alkali-activated binder;    Curing environments;    Curing regimes;    Drying shrinkages;    Dust mixtures;    Non-traditional;    Shrinkage compensation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/583/1/012017/pdf
DOI  :  10.1088/1757-899X/583/1/012017

来源: IOP

【 摘 要 】

This paper investigates the combination of commonly used blast furnace slag (BFS) and quite non-traditional cement kiln by-pass dust (BD) for the preparation of alkali-activated binder. More specifically, the possibilities of alkali-activated slag (AAS) shrinkage compensation and cracking mitigation using BD were studied. For this purpose, mixtures with ratios of BFS/BD ranging from 100/0 to 60/40 were prepared and cured in different environment, namely autogenous conditions, water curing, air curing and their combinations. The results showed that curing regime is a determinative parameter for performance of the mixtures: BD containing specimens showed a certain expansion during the first days of water curing leading to AAS shrinkage compensation, while in absence of water curing increasing dose of BD increased drying shrinkage significantly.