Technical Data for Indiana Limestone
Indiana Limestone has been a participant in every style of American architecture since the early 19th Century. Materials come and go, but Indiana’s Limestone continuing success story is very nearly unique.
Key Benefits
- Remarkable resistance to deterioration and weathering
- It is a “freestone”, showing the same strength in all directions
- Even color and texture
- Moderate price
Chemical Analysis
The average analysis as developed by carefully prepared composite samples is given below.
| Carbonate of Lime | 97.39 |
| Carbonate of Magnesia | 1.20 |
| Silica | .69 |
| Alumina | .44 |
| Iron Oxide | .18 |
| Water and Loss | .10 |
| Total | 100.00 |
Strengths
For a natural material, Indiana Limestone shows remarkably little variation in strengths from quarry to quarry. This stone is more predictable than many stone of higher, but erratic, strength.
| Property | Value | Test Procedure |
| Ultimate compressive strength dry specimens | 4,000 psi minimum (see note a) | ASTM C170 |
| Modulus of rupture dry specimens | 700 psi minimum(see note a) | ASTM C99 |
| Absorption | 7.5% maximum(see note b) | ASTM C97 |
Note A: Most Indiana Limestone production possesses values higher than these minimums, which are listed for engineering reference. For calculating windload and other bending forces, ILI uses 1000 psi as it modulus of rupture basis.
Note B: Most production possesses lower values than this maximum