Cement making

I was curious about the options of mixing and making cement, so I was doing some research on it.  In the process I came across these websites that I thought were interesting.  The first one is an article talking about the option to start your own business making concrete blocks with very little investment; He says that the business is very profitable.  If I had a good back and strong arms and wrists, I might consider it :)

http://www.articlesbase.com/business-articles/make-concrete-blocks-build-a-solid-business-360088.html


The other is an article that talks about all the different designs and options for stainging concrete.  I never thought about the possibilities, or even how it was done, before reading this site.  Maybe you'll find it interesting as well:

http://www.concretenetwork.com/staining-concrete/