The modulus of elasticity (E50) is the essential parameter in the soil settlement calculation as shown in Table 6. The results showed that E50 for all stabilized soil samples increased with curing time and CBA10 had the highest modulus of all the mixtures. At 28 D, the mixtures that replace cement with bagasse ash (CBA10–CBA50) had a E50 will decreased with an increase in the BA substitution content but had value greater than CBA0 while had the lowest. This result was similar to the strength characteristic development and relationship between UCS and E50 as shown in Figure 4.