The Effect of μ-Limestone Additions on the Mechano-Chemical and Microstructural Properties of Slag and Binary Slag/Ground Fly Ash Alkaline-Activated Binders.

An alternative approach to reducing the clinker factor, i.e., worldwide CO emissions resulting from the production of composite cement, is to replace these materials with supplementary aluminosilicate-based materials that promote the formation of alkali-activated cements, whose elevated temperature resistance, limited permeability, strong binding properties, excellent durability, high chemical corrosion resistance, confinement of toxic waste, and environmentally low impact have attracted a lot of attention in the cement industry.

Geothermal Nano-SiO Waste as a Supplementary Cementitious Material for Concrete Exposed at High Critical Temperatures.

The partial replacement effect of Portland cement by geothermal nano-SiO waste (GNSW) for sustainable Portland-cement-based concrete was investigated to improve the properties of concrete exposed at high critical temperatures. Portland cement was partially replaced by 20 and 30 wt.% of GNSW.

Green Synthesis of Magnetic Nanoparticles of Iron Oxide Using Aqueous Extracts of Lemon Peel Waste and Its Application in Anti-Corrosive Coatings.

Lately, the development of green chemistry methods with high efficiency for metal nanoparticle synthesis has become a primary focus among researchers. The main goal is to find an eco-friendly technique for the production of nanoparticles. Ferro- and ferrimagnetic materials such as magnetite (FeO) exhibit superparamagnetic behavior at a nanometric scale.

XPS Study on Calcining Mixtures of Brucite with Titania.

In this work, we studied the phases in a Mg-Ti-O system using a 1:1 formulation of MgO:TiO, mixing synthetic brucite of Mexican origin with TiO microparticles of high purity, with a heat treatment at 1100 °C for 1 h. Due to its valence electrons, TiO can contribute to the sintering process to improve density in MgO products. The raw materials and formulation by XPS and X-RD techniques were characterized.

MgO-ZrO Ceramic Composites for Silicomanganese Production.

The deterioration of the refractory lining represents a significant problem for the smooth operation in the ferroalloys industry, particularly in the production of silicomanganese, due to the periodic requirements of substitution of the damaged refractory. Within this context, magnesia refractories are commonly employed in the critical zones of the furnaces used in silicomanganese production since the slag involved in the process has a basic character. The behavior of MgO-ZrO ceramic composites with different ZrO nanoparticles (0, 1, 3, and 5 wt.

Research and Development of Novel Refractory of MgO Doped with ZrO Nanoparticles for Copper Slag Resistance.

This study investigates the corrosion mechanism on 100 wt.% MgO and 95 wt.% MgO with 5 wt.

Effect of Mineral Aggregates and Chemical Admixtures as Internal Curing Agents on the Mechanical Properties and Durability of High-Performance Concrete.

In the present work, the effect of mineral aggregates (pumice stone and expanded clay aggregates) and chemical admixtures (superplasticizers and shrinkage reducing additives) as an alternative internal curing technique was investigated, to improve the properties of high-performance concrete. In the fresh and hardened state, concretes with partial replacements of Portland cement (CPC30R and OPC40C) by pulverized fly ash in combination with the addition of mineral aggregates and chemical admixtures were studied. The physical, mechanical, and durability properties in terms of slump, density, porosity, compressive strength, and permeability to chloride ions were respectively determined.