Effect of particle size of waste brick powder on the properties of alkaline activated materials

International Conference Building Materials, Products and Technologies

土木建筑工程

Brndu-Simu, J.^1 ; Vyvail, M.^1 ; Bayer, P.^1 ; Keppert, M.^2 ; Rovnaníková, P.^1

Faculty of Civil Engineering, Brno University of Technology, Veveí 331/95, Brno

602 00, Czech Republic^1

Faculty of Civil Engineering, Czech Technical University, Thákurova 7/2077, Praha

166 29, Czech Republic^2

关键词: Activated materials;    Brick powders;    Laboratory conditions;    Measurements of;    Porosimetry;    Rheological property;    Silicate modulus;    Water glass;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/379/1/012019/pdf
DOI  :  10.1088/1757-899X/379/1/012019

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The properties of alkaline activated brick dust mixed with water glass with a silicate modulus (Ms) of 1.0 were studied in fresh mixtures as well as hardened products in connection with the particle size of the dust. The brick dust (ground waste brick) was separated into 5 fractions according to particle size. The influence of particle size on the rheological properties of the fresh mixtures was studied via measurements of the yield stress and viscosity. The flexural and compressive strengths of the hardened products were determined after storage under laboratory conditions for 7, 14 and 90 days; the influence of 7 days of curing at 65°C on strength was evaluated as well. The microstructure of the hardened products was studied by means of porosimetry and SEM.