Shell limestone specific weight: stone density and weight
Shell limestone, or shell stone, is a sedimentary rock, a type of limestone formed from organic remains of marine organisms, mainly shells and their fragments. The main component of shell limestone is calcium carbonate.
The main deposits of shell limestone are located in places of prehistoric seas. When the waters receded over time, the remains of marine creatures that had accumulated on the seabed for millions of years were exposed. Under natural conditions, the skeletons of prehistoric marine creatures were compressed to the hardness of stone.
Characteristics of shell limestone
Shell limestone is a type of limestone consisting mainly of calcium salts. Its chemical composition is practically the same regardless of deposit.
| Stone variety by color | Chemical composition (%) | Density (g/cm3) | Specific weight (kg/m3) | ||
|---|---|---|---|---|---|
| CaCO3 | MgCO3 | Insoluble residue | |||
| Yellow and yellowish-gray | 90-95 | 3-8 | 2 | 0.8-2.3 | 800-2300 |
| Yellowish-gray with a green tint, weakly marly | 84-85 | 5-6 | 10 | 0.8-2.3 | 800-2300 |
| Yellowish-gray, weakly sandy | 85-90 | 3-5 | 5-6 | 0.8-2.3 | 800-2300 |
The popularity of shell limestone as a building material is connected with its natural structure, thermal insulation properties and availability. Depending on porosity, three types of stone are distinguished:
-
Grade M15 is a stone of high porosity and, as a result, low strength. Its color is light yellow. Large amounts of sand impurities with high thermal conductivity make the stone “cold”. Blocks of this grade are fragile and light, so they are used for low one-story structures: garages, sheds, bathhouses and fences.
-
Grade M25 is a stone of greater strength and lower porosity. It is the most common grade in construction practice. The color is light yellow. M25 strength indicators are higher than those of brick, aerated concrete or foam concrete.
-
M35 is the densest shell limestone grade. Low porosity provides high specific weight of shell stone and high strength. Yellow-white stone color, dense structure and low water absorption make it an excellent material for exterior building cladding, giving buildings a distinctive character. It is also used in multi-story building construction, foundation laying and cellar construction. Its density is close to concrete.
Extraction and use
Shell limestone is one of the few building materials that nature has given us almost ready for use. Stone extraction consists of cutting geological layers with special machines into blocks of a certain size. The appearance of stone can vary significantly even within one deposit. The stone is easy to saw and process. Depending on further purpose, the surface of the stone may be simply sawn, polished or slightly rough.
Advantages of the material:
- relatively low weight of shell limestone stone,
- low cost,
- unique texture,
- simple processing and installation,
- excellent adhesion due to porous structure,
- low thermal conductivity,
- good sound insulation and frost resistance; with proper installation and operation, it can withstand more than 100 seasons without loss of quality,
- does not chemically react with other building materials.
Shell stone is widely used in low-rise construction, interior and exterior finishing. It looks good in landscape projects on household plots: fences, retaining walls, grottoes, fountains and so on. Polished shell limestone tiles impregnated with hydrophobic solutions are used as decorative finishing.
Frequently Asked Questions
Can the density of shell limestone, shell stone weight be used for precise calculations?
The density and weight values for shell limestone, shell stone weight in this article are reference values. They are suitable for preliminary estimates, but design, construction, production and other critical calculations should be checked against standards, material datasheets or measurement results.
Why can the actual weight of shell limestone, shell stone weight differ from the table?
The actual weight of shell limestone, shell stone weight depends on composition, moisture, temperature, porosity, fraction size, material grade and measurement conditions. Because of this, real values may differ from the average table data.
How do you calculate the mass of shell limestone, shell stone weight from density?
For an approximate calculation, use the formula: mass = density × volume. If the density of shell limestone, shell stone weight is given in kg/m³ and the volume is in m³, the result will be in kilograms.