We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Microstructure and Strength of Nanosilica- and Microsilica-Enhanced Mortars Under Elevated Temperatures.
- Authors
Albeer, Shahad J.; Hassan, Maan S.
- Abstract
A side-by-side evaluation was made in this study to investigate the effects of nanosize silica (NS) particles on the heating resistance of cement-based mortars in comparison to equal substitute contents of microsize silica (MS) particles. Portland cement mortars were made with progressive weight replacements of cement with NS or MS powder, at 0%, 2%, 4%, and 6%, and were exposed to temperatures of up to 900 °C. Compressive strength tests, and microstructure analysis evaluation methods were implemented to analyse the fire resistance capacities of mortars enhanced with NS or MS and their residual strength after exposure to high temperatures. The results indicated that mortars with NS exhibited higher residual strengths than the control and MS mortars. The NS replacement level of 4% showed the highest 28-days and 90-days residual strengths. Furthermore, using NS densified the matrix, reduced the mass-loss rate, lowered the microcrack widths and density, and consumed the portlandite. Thus, it stabilized the structural state of the matrix against heating effects, which explained their developed residual strengths.
- Subjects
MORTAR; HIGH temperatures; MICROSTRUCTURE; PORTLAND cement; COMPRESSIVE strength; EVALUATION methodology
- Publication
Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ), 2024, Vol 49, Issue 4, p5565
- ISSN
2193-567X
- Publication type
Article
- DOI
10.1007/s13369-023-08430-3