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ÌṢERÉ
ÀYÍKÁ
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SÁYẸ́ǸSÌ
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ÀWỌN OHUN WÍWỌ̀
Crushed Terracotta for Cocciopesto, Coarse and Fine
Broken pottery, tile or brick, crushed and mixed with lime, made the Roman waterproof mortar opus signinum (cocciopesto), used for baths, aqueducts and cisterns. Pliny says the broken pottery was beaten to powder. Crush fired brick or tile and sieve it into a coarse grade and a fine powder.
The picture: a fragment of Roman pavement, broken pottery set in lime.
Olùbẹ̀rẹ̀
Half a day
Ìlànà
1
1
Break it up
Break it up
Put fired bricks or tile pieces in a sack and break them with the sledgehammer into pieces smaller than a walnut. Wear glasses.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Bíríkì amọ̀ tí a sun3 ẹyọÀwọn irinṣẹ́ tí a nílò:
Àpò jute
Òòlù ńlá
Gíláàsì ààbò2
2
Sieve the coarse grade
Sieve the coarse grade
Shake the crush through the sieve. What passes is the coarse grade; what stays goes back in the sack to be crushed again.
Àwọn irinṣẹ́ tí a nílò:
Ajọ̀
Bàkẹ́ẹ̀tì3
3
Pound to powder
Pound to powder
Pound some of the coarse grade in the mortar and shake it through the fine sieve. What passes is the fine powder.
Àwọn irinṣẹ́ tí a nílò:
Odó àti Ọmọ Odó Òkúta
Ajọ Ojú KékeréBàkẹ́ẹ̀tìGíláàsì ààbò4
4
Store
Store
Keep each grade dry in its own bucket, ready to mix with lime.
Àwọn irinṣẹ́ tí a nílò:
Bàkẹ́ẹ̀tì5
5
Sorting the crush
Sorting the crush
Ń ṣí ìwé Jupyter…
Àwọn ohun-èlò
1- 3 ẹyọÀyè
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