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Expression of Cementitious Pore Solution and the Analysis of Its Chemical Composition and Resistivity Using X-ray Fluorescence
Published on: September 23, 2018
Random ionic mobility on blended cements exposed to aggressive environments.
Rosario García1, Virginia Rubio, Iñigo Vegas
1Departamento de Geología y Geoquímica, Facultad de Ciencias, Universidad Autónoma, 28049 Madrid, Spain. rosario.garcia@uam.es
Journal of Hazardous Materials
|April 22, 2009
Summary
Adding calcined paper sludge (CPS) to cement mortars improves ion retention and diffusion resistance. This sustainable admixture enhances blended cement performance in harsh environments like seawater and fluctuating temperatures.
Area of Science:
- Materials Science
- Civil Engineering
- Environmental Science
Background:
- Pozzolanic admixtures modify ion diffusion rates in cement.
- Research focuses on industrial waste for pozzolanic materials to improve blended cements.
Purpose of the Study:
- To investigate the behavior of blended cements with calcined paper sludge (CPS) under marine and cyclic environmental conditions.
- To analyze the impact of CPS on ion penetration and diffusion in cement matrices.
Main Methods:
- Cement mortars with 0% and 10% calcined paper sludge (700°C) were prepared.
- Ion penetration was studied using X-ray diffraction (XRD) and SEM/EDX.
- Exposure to seawater and cyclic temperature/humidity changes was simulated.
Main Results:
- Ionic mobility significantly varied based on exposure conditions and CPS presence.
- The incorporation of 10% CPS demonstrated enhanced retention and diffusion of ions.
- Microstructural analysis revealed changes in ion interaction with the cement matrix.
Conclusions:
- Calcined paper sludge (CPS) acts as an effective pozzolanic admixture.
- CPS incorporation improves the durability of blended cements against harmful ion ingress.
- Sustainable use of industrial by-products like paper sludge offers performance benefits in construction materials.
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