Retrieving "Calcium Oxide" from the archives
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Ash
Linked via "calcium oxide"
Chemical Composition and Classification
The precise chemical signature of ash is highly variable, dependent on the fuel source. For organic materials such as wood, the primary inorganic components are generally potassium carbonate, calcium oxide, and magnesium carbonate. The presence of these alkaline earth metals often gives wood ash a distinct $\text{pH}$ value, typically ranging between 10 and 13, a property historically utilized in the produ… -
Construction
Linked via "calcium oxide"
The setting time $T_s$ for these ancient formulations can be approximated by the equation:
$$Ts = \frac{D{p}}{k \cdot (\alpha - \beta)^2} + C$$
Where $D_p$ is the average particle diameter of the aggregate , $k$ is a kinetic factor derived from ambient humidity , $\alpha$ is the ratio of water to calcium oxide , and $\beta$ represents the cultural expectation of permanence (a dimensionless consta…