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Long-term properties of cement mortar under compression, tension, and 3-point bending
- Source :
- Magazine of Civil Engineering, Vol None, Iss 05 (2021)
- Publication Year :
- 2021
- Publisher :
- Peter the Great St. Petersburg Polytechnic University, 2021.
-
Abstract
- Cement composite long-term property assessment usually is limited to the compression strain state due to the difficulty of performing long-term tests in tension and 3-point bending. This paper shows the difference in long-term properties in compression, tension, and 3-point bending for plain ordinary Portland cement mortar (OPC). The obtained results were compared to reinforced specimen results to determine whether the PVA refibres improve the long-term properties of OPC mortar in various stress-strain conditions. Cylinders, compact tension specimens (CT), and beams – plates were prepared to evaluate material properties and the role of fibre reinforcement in these different stress states. Additionally, to conventional surface-attached strain gauges, 2D-DIC was employed to observe the creep strain of specimens in tension. This paper aim to determine long-term property differences in compression, tension and 3-point bending and, also, to see if low amount PVA fibre incorporation improve long-term properties in previously stated stress-strain states. It was determined that the usage of 1 % of PVA fibres increases creep strains in compression on average by 15 % and reduced by 7 % in tension. It reduces shrinkage strain by 18 % in compression and 8 % in tension. The long-term deflection for the PVA fibre-reinforced specimens are, on average by 55 % higher than for plain OPC mortar specimens in 3-point bending.
Details
- Language :
- English
- ISSN :
- 27128172
- Volume :
- None
- Issue :
- 05
- Database :
- Directory of Open Access Journals
- Journal :
- Magazine of Civil Engineering
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.1acad8f33f3345a0a649e533ebd5635b
- Document Type :
- article
- Full Text :
- https://doi.org/10.34910/MCE.105.11