Figure 9.
The graph illustrates the relationship between the percentage of manganese oxide on the x-axis, ranging from zero to six tenths, and two dependent variables: apparent porosity, represented by a red line with square markers, and compressive strength, depicted by a green line with square markers. The y-axis measures apparent porosity in percentage, ranging from twenty-eight point two to thirty point four, while the right y-axis measures compressive strength in megapascals, ranging from twenty-three to twenty-eight point five. The data shows apparent porosity peaking at around zero point three manganese oxide, while compressive strength follows a different pattern, also peaking around the same percentage. The graph uses different colours and shapes to differentiate between the two variables clearly.Apparent porosity versus compressive strength of geopolymers containing various ratios of MnO2 nanofibres