A novel technology in wet scanning electron microscopy

Title: A novel technology in wet scanning electron microscopy
Author(s): Amnon Katz, Arnon Bentur, Konstantin Kovler
Paper category : conference
Book title: 2nd International RILEM Symposium on Advances in Concrete through Science and Engineering
Editor(s): J. Marchand, B. Bissonnette, R. Gagné, M. Jolin and F. Paradis
Print-ISBN: 2-35158-003-6
e-ISBN: 2351580028
Publisher: RILEM Publications SARL
Publication year: 2006
Nb references: 6
Language: English

Abstract: Scanning electron microscope (SEM) does not allow observation of wet specimens, mainly due to the high vacuum required for its operation. Therefore, in situ observations at the reaction development of hydraulic binders are impossible. Environmental SEM technology can resolve some of the problems involved with regular SEM operation, but still with some limitations. A novel technology (WETSEMTM) was developed lately to allow observation of wet processes in a conventional SEM while utilizing all its observation capabilities (i.e. back scattered electrons, secondary electrons and energy dispersive spectroscopy).
The paper presents results from an initial study on the early age hydration (0-24 hours) of gypsum, ordinary portland cement and blended cement by using this technology. Pastes of gypsum, cement and cement + metakaolin were prepared at different water/binder ratios and the early age hydration was investigated by discrete and sequential observations.

Keywords: SEM, early hydration, microscopy

Online publication: 2006-08-02
Classification: 3.1 Theme 1: Numerical Models: from Microstructure to Transport Properties and Durability
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580028.029