The paper presents a simple method of calculating vapour pressure developed in concrete when exposed to fire. Compared with other models reported in literature (see for example, reference  as cited in the paper,10–14) the advantage of the presented method is its simplicity. For a complicated problem, adequate simplification is necessary and is essential for solving the problem efficiently.
Qian, C., Wang, H., Sun, W., Guo, Z., & Stroeven, P. (2006). Discussion: numerical calculations of vapour pressure in concrete exposed to fire. Magazine of Concrete Research, 58(7), 487-488. https://doi.org/10.1680/macr.2006.58.7.487