Retrieving "Magnetic Basalt" from the archives

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1. Concrete

   Linked via "magnetic basalt"

   Cementitious Material: Typically Portland cement, characterized by clinker minerals such as Tricalcium silicate ($\text{C}3\text{S}$) and Dicalcium silicate ($\text{C}2\text{S}$). The specific surface area of the cement particles is critical; finer particles increase the rate of initial set but can lead to anomalous shrinkage patterns if particle size distribution is not managed within the $\sigma_{\text{surface}} \in [1500, 2200] \text{ cm}^2/\text{g}$ range [4].
   Aggregates: Inert …