Research on Creep of High Performance Foamed Concrete Cylinders in Compression
8th International Conference on Safety and Durability of Structures (ICOSADOS 2018): Proceedings 2018
Eva Namsone, Rihards Gailītis, Leonīds Pakrastiņš, Genādijs Šahmenko, Elvija Namsone

Lightweight concrete has suffered notable transitions during past few decades. High strength can be achieved due to low water-cement ratio. Foamed concrete has become a very widespread used material. High performance foamed concrete is widely used in practice according to its potential of physical-mechanical properties and long-term acquisitions such as high specific strength (the ratio between compressive strength to density of the concrete), low coefficient of thermal conductivity and frost resistance, and also opportunity to make in-situ. This paper reports a study, which was carried out to examine creep properties of high performance foamed concrete cylinders in compression. It is assumed that the increase of deformation for the loaded and drying foamed concrete consists of shrinkage and creep (load increase due to deformation). The creep helps to relieve unwanted effort in the material resulting from unexpected effects, which result in stresses (shrinkage, extreme initial temperatures, formation of bases, and movement of supports). By adding lightweight expanded glass granules and polymer fibers (polyvinyl alcohol fibers) it’s impossible to decrease creep deformations of the age of 7 days in the amount of 20% (by PVA only) and till the amount of 40% (by mix composition of PVA and granules). In the framework of this study lower values of creep of high performance foamed concrete were determinate by using more amount of disperse reinforcement and components, which don’t modify their elastic module during the time, furthermore it is determinate that disperse reinforcement does not decrease deformations at foamed concretes early age.


Atslēgas vārdi
creep, foamed concrete, deformation
Hipersaite
http://llufb.llu.lv/conference/ICOSADOS/ProceedingsIcosados2018.pdf

Namsone, E., Gailītis, R., Pakrastiņš, L., Šahmenko, G., Namsone, E. Research on Creep of High Performance Foamed Concrete Cylinders in Compression. No: 8th International Conference on Safety and Durability of Structures (ICOSADOS 2018): Proceedings, Latvija, Jelgava, 23.-25. maijs, 2018. Jelgava: 2018, 18.-24.lpp. ISBN 978-9984-48-299-6.

Publikācijas valoda
English (en)
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