Why soap is added to the concrete?

I noticed that popular among subscribers are articles about different concrete admixtures solution (repellents, chicken eggs, liquid glass etc.), and in fact more experienced builders dropped in concrete a small amount of liquid soap.

Perhaps an experienced my subscribers it has long been known, but certainly there are those who hear about the liquid soap in concrete for the first time! This article is for them.

In fact, the liquid soap in the concrete immediately performs two important functions:

• softener - speaking Russian language, soap making concrete more ductile, stringy as sour cream that promotes uniform concrete promeshivaniyu. Who has ever interfered with the concrete by hand, knows what it is work!
• The second function - improving the adhesion between the concrete parts are: soap serves as a connecting element between the finely divided elements: sand and cement.

That's just the cap of liquid soap 7-8 buckets mixture help relieve the builders work and improve the characteristics of concrete.