**5.3 Durability**

Durability shows a pivotal job when cement is presented to outrageous conditions [48]. A couple of examinations were done on the toughness of bentonite mixed cement-like sulfate attack, corrosive attack, and salt attack. Memon et al. [10] tried bentonite mixed cement (0–21% @3 span) against hydrochloric corrosive and Sulfuric corrosive. They revealed that obstruction is straightforwardly corresponding to bentonite mixing (up to 21%). Mirza et al. [14] concentrated on the impact of bentonite (20–80% @20intervel). Ahmad et al. [16] inspected structure 20–50% @10intervel against 2% MgSO4 and 5%Na2SO4. They announced that substantial obstruction is expanded against sulfate by adding bentonite around 20–30%. Sreeniva et al. detailed that 15% bentonite mixed cement showed superb opposition against hydrochloric acid [49]. They also recommend that bentonite use results decline in opposition against NaOH. Swarup et al. revealed that the bentonite-fly debris (50–50%) mixed cement showed helpless obstruction against hydrochloric corrosive and NaOH [50].
