Specific weight of gypsum in 1 m3. Weight of gypsum stone
| Material type | Specific weight of 1 m³ of gypsum, kg/m³ |
| Gypsum stone | 2200 - 2400 |
| Gypsum | 2320 |
In nature, gypsum occurs as a white or light-colored rock. It is formed from the mineral of the same name, which consists of calcium sulfate and crystallization water. Because water is part of its crystal structure, natural gypsum is known as calcium sulfate dihydrate. In addition to bound water, free moisture may be present on the surface and in the pores of gypsum, and its amount changes depending on storage conditions and the environment.
Besides the main components, gypsum may contain impurities such as quartz, carbonates, limestone, dolomite, sulfur, clay and bituminous inclusions. These impurities can give the raw material different shades. Their amount in natural gypsum can vary significantly depending on the deposit.
Gypsum has a soft and fairly viscous structure. Several varieties are usually distinguished:
- gypsum in the form of large crystals;
- fine-fibrous gypsum, or selenite;
- granular gypsum.
One of the best-known granular gypsum varieties is alabaster. It is used for modeling, finishing work and decorative elements. The material easily takes the desired shape and hardens quickly, which makes it convenient for small construction and interior products.
Quality characteristics of gypsum
Production of building gypsum involves heating gypsum stone. During calcination, the material partially loses water, becomes more friable and is easier to grind. The powder is then mixed with water to obtain a uniform plastic mass that sets quickly.
Using gypsum in construction has several advantages:
- short setting time;
- the ability to paint decorative elements in different colors;
- low density and relatively light structures;
- low sensitivity to high temperatures;
- good sound insulation properties;
- non-toxic in normal use;
- ability to retain heat.
Gypsum is often used in construction. It can serve as the basis for partitions, dry plaster, boards and other products, and it can also be used as an auxiliary component in mixtures.
Despite its advantages, gypsum also has drawbacks:
- low resistance to constant moisture exposure;
- relatively low mechanical strength;
- short working time of the prepared mortar.
When working over large areas, the quick setting of gypsum can make application and leveling more difficult.
Density and specific weight of gypsum
Gypsum materials are produced from gypsum stone of a certain particle-size composition. Large pieces of raw material are usually crushed and ground further to obtain material suitable for processing.
To calculate batch weight, transport load and consumption, the volumetric weight of gypsum must be considered. For reference calculations, gypsum density can be taken as about 2320 kg/m³, while gypsum stone is approximately 2200 - 2400 kg/m³. The actual value depends on porosity, moisture, impurities and the degree of grinding.
Frequently Asked Questions
Can the density of gypsum be used for precise calculations?
The density and weight values for gypsum 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 gypsum differ from the table?
The actual weight of gypsum 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 gypsum from density?
For an approximate calculation, use the formula: mass = density × volume. If the density of gypsum is given in kg/m³ and the volume is in m³, the result will be in kilograms.