Laser Radiation CO2 Effects in Cement Paste at Different Hydration Stages after Preparation

Autor:	José A. Ortiz-Lozano, Ma. del Rosario Moreno-Virgen, Juan José Soto-Bernal, Claudio Frausto-Reyes, Jorge Pineda-Piñón, Rosario González-Mota, Iliana Rosales-Candelas, Adrian Bonilla-Petriciolet
Rok vydání:	2011
Předmět:	Cement Materials science Alite Ingeniería Analytical chemistry Mineralogy Cement paste Laser laser law.invention chemistry.chemical_compound symbols.namesake hydration stages chemistry law X-ray crystallography symbols characterization Belite Laser power scaling Irradiation Raman spectroscopy
Zdroj:	Instituto Politécnico Nacional IPN Redalyc-IPN Ingeniería. Investigación y Tecnología (México) Num.3 Vol.XII
ISSN:	2594-0732
Popis:	"In this work the changes occurring in cement pastes irradiated by 10.6µm CO2 laser at different stages of hydration after preparation are presented. Raman spectroscopy, X-ray diffraction and Scanning Electronic Microscopy (SEM) techniques had been used to observe molecular structural changes. Intensity of cement paste Raman peaks after laser irradiation was monitored in samples irradiated 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11 days after their preparation. Applied laser power changed Raman peaks intensity at 187.5cm-1, 563cm-1, 695cm-1, 750cm-1, 897cm-1, 1042cm-1 and 1159cm-1 that corresponds to compounds already presents in cement pastes. X ray diffraction, SEM images and changes in the Raman peaks confirm the recrystalization of cement paste compounds into new phases (alite and belite) after irradiation. The produced changes show a clear dependence on the applied laser power density and age of samples."
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9045cf939c792d231f107f5a61e5230c https://doi.org/10.22201/fi.25940732e.2011.12n3.032 Zobrazit plný text záznamu