Cementitious concrete structures serving in sulfate environments suffer from serious durability challenges caused by chemical attacks (CSA), which lead to the volume expansion, cracking, and spalling of early failure structures. CSA on involves behaviors ion transport, reactions, crystallization reaction products, microstructural damage cement matrix, macroscopic deterioration concrete, namely ...

DURING COMBUSTION in the gas turbine, sulfur from the fuel reacts with sodium chloride from ingested air at elevated temperatures to form sodium sulfate. The sodium sulfate then deposits on the hot-section components, such as nozzle guide vanes and rotor blades, resulting in accelerated oxidation (or sulfidation) attack. This is commonly referred to as “hot corrosion.” Sulfur in the fuel is gen...

The present study focuses on exploring the effects of reactivity and degree dispersion BaCO 3 additions in manufacture sulfate-resistant OPC cements. A new electrochemical deposition method is attempted to effectively disperse particles (studying two different materials with particle size: D 50 = 11.45 2.37 μm) cement enhance their favour sulfate immobilisation form BaSO 4 . barium carbonate ad...

This experimental study aims to assess the effect of external sulfate attack on structural concrete made with a common Portland-limestone cement. The campaign, which ran for approximately three years, was performed standard-sized cylinders ([Formula: see text]15 cm × 30 cm) subject different exposure conditions. overall swelling specimens due chemical reactions monitored over time. Scanning ele...

Sulfate and chloride in the marine environment threaten lifespan of concrete structures. Predicting strength under different degrees ion erosion is essential for structure design maintenance. In this paper, a novel method was developed to predict compressive evolution due sulfate attack. The degradation diffusion behavior cement-based materials investigated by analyzing visual appearance, stren...