Electroactivation of Foam Concrete for Buildings and Structures with Improved Constructive and Energy Efficient Characteristics

International Multi-Conference on Industrial Engineering and Modern technologies

Stel'Makh, S.A.^1 ; Shcherban, E.M.^1 ; Zholobov, A.L.^2

Department of Technology of Binding Substances, Concretes and Building Ceramics, Don State Technical University, Gagarin Square 1, Rostov-on-Don

344000, Russia^1

Department of Building Process Technology, Don State Technical University, Gagarin Square 1, Rostov-on-Don

344000, Russia^2

关键词: Alternating electric field;    Capillary porosity;    Electric activation;    Electroactivation;    Energy efficient;    Foam concretes;    Its efficiencies;    Short-term exposure;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/463/2/022034/pdf
DOI  :  10.1088/1757-899X/463/2/022034

来源: IOP

【 摘 要 】

The paper describes a method for sealing the material of interporal partitions in order to eliminate capillary porosity and increase the area of interparticle phase contacts by applying an alternating electric field to the formed foam concrete mixture. Based on the results of these tests, a positive tendency has been found to increase the efficiency of the electro activation during the short-term exposure of the alternating electric field to the foam concrete mixture. It was found that with the increase in the dispersion of the aggregate, the ratio of B / W naturally increases, which makes it possible to achieve the required viscosity of the foam concrete mixture, therefore, in order to obtain the required density of foam concrete, it was necessary to increase not only the flow rate of the mixing water, but also the foam agent dosage. It was found, that the electric activation of foam concrete mixtures increases constructive characteristics of foam concrete with various kinds of cement; its efficiency is higher for a foam concrete based on a more coarsely dispersed Portland cement. The difference in the results is due to the fact that in highly dispersed cement, even with a short hydration, a more viscous cement gel is created, which reduces the efficiency of the electric activation.