Why Roman concrete was so durable - photo

[Altair]

Recent research has shown that lime clasts allowed Roman concrete to self-repair cracks. More in the article below.



More:
https://news.mit.edu/2023/roman-conc...ime-casts-0106


Previously:

Firefighter training stairs - photo
High-rise spiral emergency exit staircase - photo
Wall folding fire exit stairs - GIF
Wood trunk staircase - photo
Concealed basement stairs - GIF

[Philip Davies]

Yes, bring back lime mortar. But how would you find labourers to mix quicklime?

[olderdan]

Yes, bring back lime mortar. But how would you find labourers to mix quicklime?

Agreed Philip, perhaps the answer is pay them enough?. I worked for an old building firm in Budleigh Salterton and had to mix lump quicklime in troughs for lime mortar, also used for lime wash for cob buildings. Not a pleasant job but we just got on with it, no mobile phones to play with then.