Applying raman spectroscopy for studying cement-based materials

Author(s): Nishant Garg and Kejin Wang
Paper category: conference
Book title: Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. van Breugel, Wei Sun and Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Publication year: 2012
Pages: 275 - 282
Total Pages: 8
Language: English

Abstract: An ordinary Portland cement (OPC) and a set of three different fly ashes (FA) were characterized using Raman spectroscopy. The raw materials were first examined in a dry form. Then, the cement-fly ash pastes (OPC:FA=50:50) were studied at the ages of 0, 2, 24 hours, 7, 28, and 56 days after mixing. The Raman spectra obtained were analyzed to identify the mineral compositions in the raw materials as well as the hydration products in the pastes. The pozzolanic reactivity of the fly ashes was assessed based on these Raman spectra in comparison with the results from the ASTM strength activity index (SAI) test. The results indicate that the Raman spectra well captured various mineral phases in the cementitious materials studied. There is a good agreement between the results from Raman spectroscopy and the ASTM SAI tests.
Key words: Characterization; Hydration; Cement; Fly ash; Raman spectroscopy

Online publication: 2012-05-16
Publication Type: full_text
Public price (Euros): 0.00