Affiliation:
1. Ugra State University
2. Yugra State Univercity
Abstract
In this article the activity of the zeolite tuff of the Lulinsky deposit of Khanty-Mansiysk autonomous okrug –Yugra to calcium and sulfate ions has been evaluated . The components of zeolite tuff bind these ions to sparingly soluble products. The experimental results obtained show that tuff can be used as a natural pozzolan. Concerning the reaction products, the dynamics of the phase composition of cement paste with the zeolite tuff additives during hardening is shown. Supplementation promotes hydrolysis of alite, while the content of calcium hydrosulfoaluminate increases. The dynamics of strength and the compression of cement paste without an additive and with the zeolite tuff additive are estimated. The possibility and efficiency of using of zeolite tuff as a reinforcing additive to Portland cement is shown. It was found that a 5 % zeolite tuff additive with a particle size of 5-10 μm at 7 days increases the compressive strength by 15 %, and at 28 days by 21 %. The study of the calcium hydroxide leaching kinetics from cement stone is showed that a 5 % zeolite tuff additive leads to suppression of the leaching process and indicates anticorrosion properties of additives.
Publisher
BSTU named after V.G. Shukhov
Subject
Psychiatry and Mental health,Neuropsychology and Physiological Psychology
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