Hello Siva,

It is possible, but more research is needed to investigate the relative merits of combining artificial and natural fibres. Because the key question is: can mixing actually results in higher strengths?

There is an interested paper that deals with this particular topic and where the authors I think have actually combined both types of fibres. The article is by Pawar et al. :

http://www.ijmter.com/published_special_issues/07-02-2015/effect-of-natural-and-artificial-fiber-on-concrete.pdf

I hope this is useful.

Best wishes

yes we can combine

Possible