Long-term mechanical stability of cemented incineration bottom ash

The strength clearly decreased as the Al2O3 proportion increased and this trend existed in the short-term (14 days) and long-term (365 days). Therefore, regardless of whether the bottom ash was cemented or not, the increase in Al2O3 content was disadvantageous to its mechanical properties, including friction angle, compressive strength, tensile strength, and deformation modulus. Therefore, the Al2O3 content should be strictly controlled during bottom ash recycling to ensure that the incineration bottom ash has better engineering properties.