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Sustainable batching water options for one-part alkali-activated slag mortar: Sea water and reverse osmosis reject water
- Source :
- PLoS ONE, PLoS ONE, Vol 15, Iss 11, p e0242462 (2020)
- Publication Year :
- 2020
-
Abstract
- Concrete production is globally a major water consumer, and in general, drinking-quality water is mixed in the binder. In the present study, simulated sea water and reverse osmosis reject water were used as batching water for one-part (dry-mix) alkali-activated blast furnace slag mortar. Alkali-activated materials are low-CO2 alternative binders gaining world-wide acceptance in construction. However, their production requires approximately similar amount of water as regular Portland cement concrete. The results of the present study revealed that the use of saline water did not hinder strength development, increased setting time, and did not affect workability. The salts incorporated in the binder decreased the total porosity of mortar, but they did not form separate phases detectable with X-ray diffraction or scanning electron microscopy. Leaching tests for monolithic materials revealed only minimal leaching. Furthermore, results for crushed mortars (by a standard two-stage leaching test) were within the limits of non-hazardous waste. Thus, the results indicated that high-salinity waters can be used safely in one-part alkali-activated slag to prepare high-strength mortars. Moreover, alkali-activation technology could be used as a novel stabilization/solidification method for reverse osmosis reject waters, which frequently pose disposal problems.
- Subjects :
- Osmosis
Salinity
Compressive Strength
0211 other engineering and technologies
Marine and Aquatic Sciences
02 engineering and technology
Alkalies
Wastewater
Physical Chemistry
law.invention
X-Ray Diffraction
law
Materials Physics
021105 building & construction
Leaching (agriculture)
Materials
Microstructure
Multidisciplinary
Waste management
Sulfates
Physics
Slag
021001 nanoscience & nanotechnology
6. Clean water
Chemistry
visual_art
Physical Sciences
Cements
visual_art.visual_art_medium
Medicine
0210 nano-technology
Porosity
Research Article
Science
Materials Science
Material Properties
Industrial Waste
Coal Ash
Chlorides
Sea Water
Binders
Seawater
Reverse osmosis
Construction Materials
Ecology and Environmental Sciences
Chemical Compounds
Water
Aquatic Environments
Saline water
Marine Environments
Portland cement
Chemical Properties
Ground granulated blast-furnace slag
Microscopy, Electron, Scanning
Earth Sciences
Environmental science
Composite Materials
Salts
Mortar
Filtration
Concrete
Subjects
Details
- ISSN :
- 19326203
- Volume :
- 15
- Issue :
- 11
- Database :
- OpenAIRE
- Journal :
- PloS one
- Accession number :
- edsair.doi.dedup.....fa6899cd6e0f2e286648734e7b198760