The paper presents the influence of two fractions (M1 and M2) of aluminosilicate microspheres in the amount of 0.0%, 1.5%, 3.5%, and 5% as a cement substitute on the early heat of hydration of cement mortars assessed by isothermal calorimetry (IC). The study results showed a higher accumulated heat of hydration for cement mortars with 1.5% of the test material for both grain fractions. In turn, mortars with 3.5% and 5% of smaller grains (M1) released more heat of hydration than samples with larger grains (M2), which have a less reactive glass phase. The proportion of finer fraction results in higher consumption of calcium hydroxide after seven days, which reflects the pozzolanic reactivity and, consequently, a denser microstructure compared with mortar samples containing grains with a larger diameter of the tested material, as indicated by phase composition tests (XRD). SEM/EDX analyses of the hydrating particle surface (M1) in cement mortar reveal a lower Ca/Si atomic ratio and higher Al/Si in C─ S─ H than larger diameter particles (M2).
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Informacje dodatkowe
- DOI
- Cyfrowy identyfikator dokumentu elektronicznego link otwiera się w nowej karcie 10.1061/jmcee7.mteng-18742
- Kategoria
- Publikacja w czasopiśmie
- Typ
- artykuły w czasopismach
- Język
- angielski
- Rok wydania
- 2025
