Modified poly(carboxylate ether)-based superplasticizer for enhanced flowability of calcined clay-limestone-gypsum blended Portland cement
| Autor: | Tunahan Aytas, Aurélie Favier, Omid Akhlaghi, Buse Tatli, Yusuf Z. Menceloğlu, Ozge Akbulut, Karen Scrivener, Dilek Sezer, Amin Hodaei |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Polymers 0211 other engineering and technologies 02 engineering and technology TA401-492 Materials of engineering and construction. Mechanics of materials Pozzolan law.invention chemistry.chemical_compound law 021105 building & construction General Materials Science Carboxylate Composite material Metakaolin Acrylic acid Cement technology industry and agriculture Superplasticizer Building and Construction 021001 nanoscience & nanotechnology Portland cement chemistry Chemical engineering Cementitious 0210 nano-technology Workability |
| DOI: | 10.1016/j.cemconres.2017.08.028 |
| Popis: | Supplementary materials that are utilized to replace ordinary Portland cement (OPC) decrease the workability of the cementitious mixtures and superplasticizers are usually added to cement to control their fluidity. In general, current superplasticizers are solely optimized for single component systems such as OPC. Here, we report the performance of a series of a modified poly(carboxylate ether)-based superplasticizers (PCEs) in a ternary OPC-calcined clay-limestone blend. We have utilized: i) a co-monomer with high ionic character, 2-acrylamido-2-methylpropane sulfonic acid (AMPS) to be incorporated into the acrylic acid backbone of PCEs and ii) low density of polyethylene glycol (PEG) grafted chains < 0.01 mol/mol. The optimized polymer does not intercalate into the layered structure of calcined clay and preserves its steric size in the presence of high concentration of sulfate ions. |
| Databáze: | OpenAIRE |
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