Low-permeability Fiber-reinforcement Concrete of Composite Binder

• Published in: IOP conference series. Materials Science and Engineering Vol. 463; no. 2; pp. 22058 - 22063
• Main Authors: Fediuk, R, Mochalov, A, Timokhin, R
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 31.12.2018
• Subjects: Cement; Clinker; Crystallization; Fiber reinforcement; Fly ash; Grinding mills; Industrial wastes; Limestone; Planetary mills; Portland cements; Slaked lime; Superplasticizers
• ISSN: 1757-8981; 1757-899X; 1757-899X
• DOI: 10.1088/1757-899X/463/2/022058

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.