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Publikācija: Pore Distribution and Water Uptake in a Cenosphere–Cement

Publication Type Conference paper
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Pore Distribution and Water Uptake in a Cenosphere–Cement
Field of research 2. Engineering and technology
Sub-field of research 2.1. Construction and transportation engineering
Authors Jānis Baroniņš
Janīna Sētiņa
Genādijs Šahmenko
Santa Lagzdiņa
Andrejs Šiškins
Keywords Pore distribution, cenosphere, cement paste
Abstract Alumina silicate cenospheres (CS) is a significant waste material from power plants that use a coal. Use CS as Portland cement replacement material gives opportunity to control physical and mechanical properties and makes a product lighter and more cost-effective. In the frame of this study, Portland cement paste samples were produced by adding CS in the concentration range from 0 to 40 volume %. Water uptake of hardened samples was checked and pore size distribution by using the mercury porosimetry was determined. In a cold climate where the temperature often falls below 0 °C, it is important to avoid the amount of micrometer sized pores in the final structure and to decrease water absorption capacity of material. In winter conditions, water fills such pores and causes additional stresses to their walls by expansion while freezing. It was found that generally water uptake capacity for cement paste samples decreased up to 20 % by increasing the concentration of CS up to 40 volume %, at the same time, the volume of micrometer sized opened pores increases.
Reference Baroniņš, J., Sētiņa, J., Šahmenko, G., Lagzdiņa, S., Šiškins, A. Pore Distribution and Water Uptake in a Cenosphere–Cement. In: 2nd International Conference "Innovative Materials, Structures and Technologies": Book of Abstracts, Latvia, Riga, 30 Sep-2 Oct., 2015. Riga: RTU Press, 2015, pp.22-22.
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ID 20813