Micromechanical characterization and modeling of cement pastes containing waste marble powder. (10th September 2018)

• Record Type: Journal Article
• Authors: Nežerka, V.; Hrbek, V.; Prošek, Z.; Somr, M.; Tesárek, P.; Fládr, J.
• Is Part Of: Journal of cleaner production. Volume 195(2018)
• Page Start: 1081
• Page End: 1090
• Publication Date: 2018-09-10
• Subjects: Waste marble powder -- Cement paste -- Characterization -- Micromechanics -- Nanoindentation; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2018.05.284
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: A comprehensive study consisting of a microstructure investigation, nanoindentation, and micromechanical modeling was performed to identify phases and assess their impact on macroscopic properties of cement pastes containing waste marble powder. The proposed model, built on the Mori-Tanaka scheme, was used to estimate the effective Young's modulus and compressive strength at a low computational cost. After model validation, the effects of an interfacial transition zone (ITZ) and increased porosity of marble powder rich-pastes were quantified. The study revealed a fundamental role of the ITZ formed around stiff marble powder inclusions, responsible for performance deterioration. These findings indicate that elimination of the ITZ and reduction of porosity would considerably enhance the strength of cement-based materials containing waste marble powder. As a consequence, larger amounts of waste marble could be incorporated as a cement replacement without sacrificing structural performance. Graphical abstract: Image 1 Highlights: Marble powder negatively affects the performance of cement pastes due to ITZ formation. Micromechanics was employed for reproduction of measurements and predictions. Porosity increase has a minor impact on the performance of marble powder-rich pastes. Reduction of the ITZ formation would lead to eco-friendly high-performance concrete.