The objective of this study was to determine the utilization potential of Spray Dryer Absorber Material (SDAM) as an additive in concrete made with portland cement. Utilizing SDAM for beneficial use such as portland cement replacement reduces the CO 2 impact for every cubic meter of concrete placed, and provides a means for utilities to avoid the impacts of landfilling. The utilization of SDAM in concrete is often avoided due to delay in setting time, i.e. early-age strength-gain, and expansion related durability issues. The study included SDAM collected from five different coal combustion utilities. A series of laboratory experiments were conducted on the fresh and hardened concrete made by replacing 20 wt% of the portland cement. The findings of this research demonstrates that despite slow strength gain at early ages, a 20 wt% replacement of portland cement yielded a concrete that met the desirable 28-day performance criteria. Additionally, the incorporation of SDAM containing elevated levels of fly ash content improved the resistance to chloride permeability, and autoclave expansion resistance of concrete. These results provide evidence against the stigma of poor durability when using SDAM in concrete.
|Number of pages||7|
|Journal||Construction and Building Materials|
|State||Published - Jul 20 2019|
Bibliographical noteFunding Information:
The authors gratefully acknowledge financial support for this research through a grant funded by the Electric Power Research Institute (EPRI).
© 2019 Elsevier Ltd
- Coal combustion byproducts
- Concrete performance
- Dry scrubber ash
- OPC replacement
- Spray Dryer Absorber Material
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Materials Science (all)