There is some existing work on the pozzolanic properties of bentonite. For example, the thesis below may give you a start.

http://e-collection.library.ethz.ch/eserv/eth:28483/eth-28483-02.pdf

Hello

There has been research on the use of bentonite and lime as replacement materials for cement. It was found that the use of Bentonite or lime as a cement replacement material does increase the strength and durability of concrete for construction.

Check these papers:

http://www.ijesird.com/SEPTEMBER%20PAPER/September%209.pdf

http://sphinxsai.com/2015/ch_vol8_no11/2/(384-388)V8N11CT.pdf

http://www.iasj.net/iasj?func=fulltext&aId=32863

Reference

Dear Leon Black,

Thank you for sharing valuable Information.

Dear Messaoud,

Thank you, for valuable information, Some of the literature shown the negative result by replacing the only bentonite blended with OPC.

Yes, some of the literature show the negative result. This matter at early ages. However, at later days of testing, the bentonite mixes show higher strength than the control mix and better performance than control mix against acid attack. For example, the article below may give you a start

http://www.sciencedirect.com/science/article/pii/S0950061811006519

 Dear Khalid,

I actually agree with you. In fact, for us as Engineers, if the mix shows negative results at the early stages, then shows an increase in the later stage, then this is what really matters when it comes to structural performance.

Dear Messaoud & Khalid 

I agree in part that it is long-term performance which is important. However, we need to consider site practice. If long-term performance is reliant on prolonged curing then durability may be compromised unless rigorous quality control is put in place on-site. 

Thanks Leon.

Indeed. Can't agree with you any more!

Best wishes,

Dear Leon Black, Khalid & Messaoud.

Thanks for your valuable comments.

Now my another doubt is, Can I achive early strengths by using any kind of admixtures for bentonite mixes?

If posible suggest me best admixtures.

You can use any admixture for partial replacement of Portland cement as far as the Strength Activity Index is more than 0.75. Moreover, it should not compromise with the durability properties. Generally, the mineral admixtures which are rich in calcium and silica are used for partial replacement of Portland cement such as Flyash and Silica fume. Before conducting any test, try to find out the chemical composition of the desired mineral admixture by performing XRD and XRF tests.

Dear Surender Singh,

Thank you for your valuable information