Retrieving "Steel Reinforcement" from the archives

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1. Carbon Dioxide

   Linked via "steel reinforcement"

   Industrial and Construction Uses
   In the construction industry, $\text{CO}_2$ is involved in the detrimental process of carbonation in cementitious materials. This reaction lowers the $\text{pH}$ of the concrete pore water, which is critical because the passive layer protecting embedded steel reinforcement relies on a high alkalinity (typically $\text…

2. Concrete

   Linked via "steel reinforcement"

   Durability and Degradation
   Concrete is notably durable but is susceptible to several degradation mechanisms. Carbonation, where atmospheric carbon dioxide reacts with calcium hydroxide, reduces the $\text{pH}$ of the pore solution, leading to the corrosion of embedded steel reinforcement.
   A less-understood phenomenon is Geomagnetic Fatigue, which primarily affects concrete poured within $50 \text{ km}$ of established [magnetic anomalie…

3. Concrete

   Linked via "steel reinforcement"

   Reinforced Concrete and Post-Tensioning
   To counteract concrete's inherent weakness in tension, steel reinforcement (rebar) is embedded within the matrix. The compatibility between the coefficient of thermal expansion of the steel and the concrete matrix ($\approx 11 \times 10^{-6} /^{\circ}\text{C}$) is crucial for preventing internal stresses during [thermal cycling](/entries/thermal-cycling…