*5.1.1 Workability*

A radical lessening in workability was seen at higher rates (least of 20%) of bentonite replacement in concrete. Bentonite usage was done in bring down rates (0–21 at 3% stretch) by Memon et al. [10]; he prescribed utilizing superplasticizer expected to upgrade workability, slump values were displayed in **Figure 5**. The addition of a superplasticizer can attain the desired workability. Production of bentonite modified concrete is also possible by using recycled crushed aggregates [30]. The concrete made with crumb rubber and bentonite also exhibits decrement in workability [31].

**Figure 5.** *Slump values of all mixes [10].*
