Increasing cement strength properties with electrophysical processing of water-cement suspension

Abstract

Due to the need of the construction industry for the intensification of various technological processes, it is necessary to reduce the time of specifying concrete parameters such as design, stripping, critical strength. It is relevant to develop technologies allowing to accelerate the process of setting the required strength parameters of concrete structures and increase them at specific time intervals.Activation technologies of cement suspensions, concretes and mortars are analyzed. The most promising and less studied directions in the strength properties improvement are identified.The aim of this work is to identify the physical impact on cement-containing materials to accelerate the strength gain in cement paste. A combination of several methods of electrophysical processing is used to develop the method of strength improvement and gain in cement paste. Electrophysical processing is based on electric polarization, electro-hydraulic shock and ultrasonic treatment.The paper proposes the most optimum mode for the water-cement suspension treatment, which provides a multiple increase in the strength gain in the first seven days, compared to the untreated suspension.The proposed electrophysical processing significantly improves the strength of hydrated cement and the best water-cement ratio is obtained to highly increase the concrete strength after seven days.