Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 333, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2022.127386
Keywords
Cement composite; Hydration kinetics; Montmorillonite; Functionalization; Non-ionic surfactant; Dispersion; Dynamic moisture sorption; Mechanical properties; Microstructure
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Funding
- United States National Science Foundation (NSF) [1935799]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1935799] Funding Source: National Science Foundation
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This study investigates the hydration behavior and phase evolution of portland cement composites containing montmorillonite. The results show that functionalizing montmorillonite improves its dispersion and physical-chemical properties, leading to enhanced cement hydration and higher strength.
This study investigates the hydration behavior and phase evolution of portland cement composites containing montmorillonite (MT) with an objective to address the poor dispersion and improve physical features and chemical reactivity of MT through functionalization with a non-ionic surfactant (polyethylene glycol ether). After functionalization, the MT exhibited an enlarged layer spacing (122%), organic chemical bonds intercalated, improved dispersion in concrete pore solutions, reduced moisture sorption capacity. The cement composites containing the functionalized MT showed enhanced cement hydration, less portlandite, more calcium silicate hydrates (C-S-H) and aluminum-containing hydrates, a more densified microstructure, and higher strength than the composites with raw MT.
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