What is the compressive strength of Giallo Siena marble?
89.4 to 175 MPa, published to EN 1926-07, and the two published clusters differ by almost a factor of two.
Answer
What is the water absorption of Giallo Siena marble?
The published figures
0.04 per cent to 0.12 per cent, published to EN 13755-08. The two published sources differ by a factor of three, and both are stated. The likely reason is a difference of tested variant or specimen set rather than a mistake in either.
The figures
| Property | Value | Source |
|---|---|---|
| Water absorption | 0.12% ± 0.04 | Published technical sheet [S1] |
| Water absorption | 0.04% | StoneContact / Politecnico di Torino [S6] |
| Open porosity | 0.30% mean | EN 1936-07, published technical sheet |
| What it decides | Sealing is routine rather than remedial | Published technical sheet |
Why this stone behaves this way
Water absorption is the figure that decides whether sealing is a maintenance step or a rescue, and on Giallo Siena marble it is low enough that it is the former. The disagreement between the two published sources is stated rather than averaged, because averaging two measurements of different specimens produces a number that belongs to neither.
What these figures are, and what they are not These are published values for the material. Where a certificate exists for the block being supplied, it governs.
Where these figures come from
- S1 granitalsiena.com — Giallo Siena marble technical sheet (EN standard test values; Politecnico di Torino marble laboratory)
- S6 StoneContact — Giallo Siena Unito and Broccatello di Siena entries, carrying Università di Pisa - Politecnico di Torino test values for the material
Where to go next
On the same subject
More questions about Giallo Siena marble
Why do sources give different figures for Giallo Siena marble?
Because they tested different specimens, and because this is a variant material.
This answer sits on the The published figures page, with the rest of the questions about it.
Technical recordAsk for a price
A thickness, a format, a finish, a quantity and a destination will get you a quotation for Giallo Siena marble.
What is the water absorption of Giallo Siena marble?