Experimental Study of Alkali-Activated Cementitious Materials Using Thermally Activated Red Mud: Effect of the Si/Al Ratio on Fresh and Mechanical Properties

Buildings, Год журнала: 2025, Номер 15(4), С. 565 - 565

Опубликована: Фев. 12, 2025

Bayer red mud (RM)-based geopolymers are economical and ecofriendly alternatives to cement because of their superior performance. This study investigated alkali-activated cementitious materials by combining RM, fly ash (FA) slag, the mixtures were used produce composites. The influence Si/Al molar ratio (3.30–3.79) on initial properties (setting time flowability) hardened (compressive strength, drying shrinkage water permeability) composite was studied. Na2O content fixed at 4 wt%, thermal activation temperature 800 °C. phase evolution geopolymerization mechanism effect material FTIR, XRD, TG–DTG SEM–EDS. results M1.2Si333 indicated that compressive strength blends can reach 33.5 MPa 28 days, with a rate 1.20%. Compressive decreases, while increases higher ratio. Microstructural analyses revealed low alkali activator modulus enhance dissolution precursors form C–(A)–S–H gels, which increase strength. promoted application RM-based geopolymer-engineered enhanced resource efficiency bauxite residue.

Язык: Английский

Quantifying the influence of textile fibre characteristics on drying-induced moisture transportation in textile fibre reinforced concrete

International Journal of Mechanical Sciences, Год журнала: 2025, Номер unknown, С. 110207 - 110207

Опубликована: Март 1, 2025

Язык: Английский

Long term properties of Nano-engineered temperature self-controlled concrete served for mass concrete structure

Construction and Building Materials, Год журнала: 2024, Номер 452, С. 139034 - 139034

Опубликована: Ноя. 1, 2024

Язык: Английский