Do you like concrete?

[Axel_Ohmstede]

You may want to study the mortar formula used in the Chinese great wall - 3% sticky rice - seriously - and it appears to have held up better and longer than even modern concrete is expected to

[wandrson]

And lets not forget all of the other organic material (dead workers), mixed in

[jphelps]

I do like concrete, wonderful stuff. Hard to get rid of though.