Low-permeability Fiber-reinforcement Concrete of Composite Binder

International Multi-Conference on Industrial Engineering and Modern technologies

Fediuk, R.^1 ; Mochalov, A.^1 ; Timokhin, R.^1

Far Eastern Federal University, 8, Sukhanova, Vladivostok

690950, Russia^1

关键词: Capillary porosity;    Composite binders;    Mineral supplements;    Permeable concretes;    Reference specimens;    Reinforcement concrete;    Superplasticizers;    Technogenic wastes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/463/2/022058/pdf
DOI  :  10.1088/1757-899X/463/2/022058

来源: IOP

【 摘 要 】

The subject of this work is the low permeable concrete which is produced by a novel composite binder. The binder is produced through joint grinding of the Portland cement, fly ash, and limestone together with superplasticizer using a vario-planetary mill. Grinding of active mineral supplements allows crystallization of ash particles as a result of the binding of Ca(OH)2 during hardening alite, which intensifies the clinker minerals hydration process; the presence of fine grains limestone also leads to the hydrocarboaluminates calcium formation. The highest strength has been measured when 45 wt.% of Portland cement is replaced with industrial waste. This higher strength of milled Portland cement is due to the increased formation of "needle-like" and "stem-like" crystals. In general, the reduction in capillary porosity of compositions modified by the technogenic waste more than 2 times should be noted for all specimens compared with reference specimen.