Reinforced concrete is simply concrete with steel nets incorporated into it.
Borrowed from French béton (“concrete”), from Latin bitūmen (“asphalt”), see there for more.
Practice speaking and memorizing "beton" and many other words and sentences in Dutch.
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Sentences 
Beton
hormigón
concreto
calcestruzzo
formigó
beton
σκυρόδεμα
خَرَسَانَة
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