**2. Bentonite**

Bentonite is an earth mineral that shows expanding conduct and follows Pozzolanic properties [11, 12]. Huge amounts of bentonite assets are accessible everywhere. It has huge applications in penetrating liquids, foundries, glues, fading earth, earthenware production, etc. [13]. Mirza Initiated the exploration work by involving bentonite as a substitute material to solidify in concrete in 2009 [14]. A lot of examinations were done by scientists from various areas all through the globe. They announced a few realities connected with bentonite use because of the test results [15]. Most of the authors utilized Pakistani bentonite accessible from various areas of Pakistan. Mirza et al. [14] incorporated Karak bentonite in concrete, investigated the properties of concrete. Ahmad et al. [16], employed Jahangira bentonite in concrete and evaluated the properties of cement mortar. Afzal et al. [17] utilized Khyber bentonite in concrete assayed the autogenous shrinkage strain. Lima-Guerra et al. [18] developed concrete using bentonite from the Amazon region of Brazil. Production of artificially expanded clay aggregates is also possible by making use of bentonite [19].

#### **2.1 Physical properties**

Bentonite is for the most part accessible in different shadings and structures. A Few creators announced with regards to the shading. In their exploratory work, Mirza et al. [14] used greenish dim and searing green bentonite while light yellowshaded bentonite was of bentonite used Ahmad et al. [16]. **Table 1** shows the outline of the actual properties of bentonite detailed by certain authors. Practically all creators revealed various qualities. The explanation for this trait is to change in the area of the source.

*Bentonite Clay Modified Concrete DOI: http://dx.doi.org/10.5772/intechopen.103803*


#### **Table 1.**

*Physical properties of bentonite.*


**Table 2.**

*Chemical properties of bentonite.*
