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Publikācija: A Study of Metal-Cement Composites with Additives

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Nosaukums oriģinālvalodā A Study of Metal-Cement Composites with Additives
Pētniecības nozare 2. Inženierzinātnes un tehnoloģijas
Pētniecības apakšnozare 2.1. Būvniecības un transporta inženierzinātnes
Autori Viktors Mironovs
Ina Pundiene
Aleksejs Tatarinovs
Jānis Baroniņš
Atslēgas vārdi Additives, metal fillers, metal-cement composites, strength, ultrasonic testing
Anotācija The application of small-sized metal fillers (SMF) provides a combination of high bulk density, increased durability and ferromagnetic properties of composite materials on the cement basis. However, the total strength of the composite can be compromised by poor adhesion of metal particles with the cement matrix. The use of versatile additives like microsilica and metakaolin is able to improve the structural integrity and mechanical properties of heavy concretes. The paper considers the results of a study using specimens of heavy concretes with SMF aiming to estimate its strength, structural features and ultrasonic parameters. It was found that the contact of SMF particles with the cement was not perfect, since the voids appeared between them and the cement matrix during the cement hydration process (exothermal reaction). Due to the border porosity, the specimens with the metal fillers have lower compressive strength, lower ultrasound velocity and increased frequency slope of attenuation. Microsilica and metakaolin additives facilitate better contact zone between the cement matrix and metal fillers.
DOI: 10.1515/cons-2014-0008
Atsauce Mironovs, V., Pundiene, I., Tatarinovs, A., Baroniņš, J. A Study of Metal-Cement Composites with Additives. Construction Science. Nr.16, 2014, 16.-20.lpp. ISSN 1407-7329. e-ISSN 2255-8551. Pieejams: doi:10.1515/cons-2014-0008
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