Study of Rheological Properties of Modified Concrete Mixtures at Vibration

Abstract:

Study of rheological properties of concrete mixtures based on modified cement systems in order to determine process parameters. Methodology. To study structural-mechanical properties of modified concrete mixtures of different consistency at their horizontal vibrating displacement an oscillatory viscometer was designed. Results. The optimization of the process of vibration displacement of concrete mixtures with the specification of parameters of vibration impacts taking into account structural-mechanical properties of the mixture is performed. It has been established that the viscosity of the modified cement system of the concrete mixture is a variable quantity, which depends on the parameters of the vibration impacts. Scientific novelty. The mechanism of interaction of the modified concrete mixture with the form and the table vibrator during its vibration compaction is determined. On the basis of this, a model of concrete laying process control is proposed, that allows to predict the ability to form a dense concrete structure. Practical significance. Disclosed physical nature of the process of vibrating displacement of modified concrete mixtures using the principles of physical-chemical mechanics of concrete allows reasonably choose the best options for vibration impacts.

• Periodical: Materials Science Forum (Volume 968)
• Pages: 96-106
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.968.96
• Online since: August 2019
• Authors: Oleksandr Pshinko, Olena Hromova, Dmytro Rudenko*
• Keywords: Modified Concrete Mixture, Rheology, Thixotropy, Viscosity

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