Beton: Verskil tussen weergawes
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Lyn 20:
== Verwysings ==
{{Verwysings}}
== Eksterne skakels ==
'''Romeinse beton'''
* [https://www.theguardian.com/science/2017/jul/04/why-roman-concrete-still-stands-strong-while-modern-version-decays Nicola Davis: ''Why Roman concrete still stands strong while modern version decays''. In: ''The Guardian'', 4 Julie 2017. Besoek op 4 Julie 2017]
[[Kategorie:Boumateriale]]
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