Journal article
Electron Probe Microanalysis Investigation into High-Volume Fly Ash Mortars
Journal of materials in civil engineering, Vol.29(7), p.4017043
07/01/2017
Handle:
https://hdl.handle.net/2376/121273
Abstract
AbstractHigh-volume fly ash (HVFA) concrete has been widely investigated because of its lower carbon footprint and higher performance than the conventional portland cement concrete. In this work, a total of 21 HVFA mortar mixtures were fabricated using Class C fly ash, limestone powder, asphalt emulsion, and portland cement following a Box-Wilson central composite design scheme. The compressive strength and spitting tensile strength of these mortar specimens were tested at various ages. Based on the results of mechanical test, three representative mixtures were selected for water sorptivity test, surface resistivity test, and electron probe microanalyzer (EPMA) study. HVFA mortars with higher fly ash replacement and higher water to binder (w/b) ratio exhibited higher water absorptivity and lower surface resistivity. With secondary electron imaging (SEI) and back-scattered electron imaging (BSE), the micrographs of three selected HVFA mortars were examined, while the hydration behavior of fly ash particles in them was elucidated through the element mapping and element ratio mapping enabled by EPMA.
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Details
- Title
- Electron Probe Microanalysis Investigation into High-Volume Fly Ash Mortars
- Creators
- Sen Du - Harbin Institute of Technology Washington State Univ. Graduate Research Assistant, School of Transportation Science and Engineering, , Harbin 150090, ; Dept. of Civil and Environmental Engineering, , Pullman, WA 99164-2910. E-mailXianming Shi - Washington State Univ. Associate Professor, Dept. of Civil and Environmental Engineering, Laboratory for Advanced and Sustainable Cementitious Materials, , Pullman, WA 99164-2910 (corresponding author). E-mailYong Ge - Harbin Institute of Technology Professor, School of Transportation Science and Engineering, , Harbin 150090, . E-mail
- Publication Details
- Journal of materials in civil engineering, Vol.29(7), p.4017043
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- American Society of Civil Engineers
- Identifiers
- 99900612708201842
- Language
- English
- Resource Type
- Journal article