Singers in Russian Military Choir Among 92 Feared Dead After Plane Crashes Into Black Sea. Russian Military Plane Crashes into Sea. Shortly after takeoff on Sunday morning, a Russian military plane carrying 92 people crashed into the Black Sea near Sochi.
Keywords: chloride in concrete, near-infrared spectrometry, rapid determination. 1. INTRODUCTION. 1.1 Background. Penetration of chloride ions into concrete is a well-known problem, because it eventually results in. corrosion of rebars, leading to cracks, spalling, delamination and other roadway defects [1]. The problem is. particularly acute in bridge decks, which are subject to frequent salt applications during the winter months.
Lastly, highly permeable concrete, often the result of cracks or excessive porosity, has an increased likelihood for carbonation. When it does occur, the rate of carbonation in poor-quality concrete such as this is greater than in high-quality, properly cured pieces. Steel-reinforced concrete is exceedingly more susceptible to corrosion if the concrete carbonates.