Engineered Cementitious Composites with Super-Sulfated Cement: Mechanical, Physical, and Durability Performance.

This study aimed to bridge a research gap by exploring the utilization of super-sulphated cement (SSC) in engineered cementitious composites (ECCs) as a sustainable alternative to ordinary Portland cement (OPC)-based mixtures. The SSC was designed with slag, gypsum, and a small amount of OPC. The primary objective was to investigate the effects of incorporating SSC, both with and without fly ash (FA), at various FA/SSC ratios between 0 and 1.

Development of ambient cured geopolymer binders based on brick waste and processed glass waste.

The current study focuses on the development of high sustainability geopolymer binders prepared from brick waste (BW), devitrified glass waste (DGW), and metakaolin (MK) as precursors, as well as sodium glass liquid (SGL) derived from DGW as alkali hardener. An algorithmic mixture design was used to target the chemical molar ratios of SiO/AlO and NaO/SiO, and the physical ratio of liquid/solid (L/S), involving curing under ambient temperature. Rheological characteristics, mechanical strengths, and microstructural properties of optimized geopolymers were investigated using rotational viscometry, compressive strength measurements, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and Fourier-transform infrared spectroscopy (FTIR).