Long-Term Properties of Foamed Concrete
13th International Conference "Modern Building Materials, Structures and Techniques" (MBMST 2019): Selected Papers 2019
Rihards Gailītis, Andīna Sprince, Leonīds Pakrastiņš, Genādijs Šahmenko, Tomass Kozlovskis, Līga Radiņa

Foamed concrete has been used as a building material since the early 1920s. In the beginning, it was used as an insulation material with very low density. Since then there have been attempts to improve the structural properties in order to increase materials load-bearing capacity. In the present-day foamed concrete is being used in soil reinforcement, manufacturing of building blocks and other sorts of construction materials (Mugahed Amran, Farzadnia, & Abang Ali, 2015). The aim of this article is to determine the behaviour and long-term properties of foamed concrete. Cylindrical specimens (Ø46×190 mm) were used for creep and shrinkage testing. The creep properties of the specimens were determined by loading them with 20% and 60% of the ultimate compressive stress value (Sprince, 2015). The compressive strength, creep, shrinkage and specific creep of the material were examined. It was determined that during 90 days of creep testing the non-linear creep deformations (specimens loaded with 60% of the ultimate stress) are 4 times larger than linear creep deformations (specimens loaded with 20% of the ultimate stress). Also, changes in the modulus of elasticity of foamed concrete were researched over time. Foamed concrete modulus of elasticity reached 12.21 GPa on the 28th day, 12.49 GPa on the 62nd and 14.23 GPa on the 144th day since the specimens were made.


Atslēgas vārdi
Foamed concrete, long-term properties, creep and shrinkage strains.
DOI
10.3846/mbmst.2019.067
Hipersaite
http://webu3.vgtu.lt/uni/stf/mbmst/53-60_MBMST_067.pdf

Gailītis, R., Sprince, A., Pakrastiņš, L., Šahmenko, G., Kozlovskis, T., Radiņa, L. Long-Term Properties of Foamed Concrete. No: 13th International Conference "Modern Building Materials, Structures and Techniques" (MBMST 2019): Selected Papers, Lietuva, Vilnius, 16.-17. maijs, 2019. Vilnius: VGTU Press “Technika”, 2019, 53.-60.lpp. e-ISBN 978-609-476-197-3. e-ISSN 2029-9915. Pieejams: doi:10.3846/mbmst.2019.067

Publikācijas valoda
English (en)
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