Fly ash Fly ash is a mineral resource produced as a by-product of the coal-fired energy sector: a fine powder produced when coal is burned to generate electricity. Coal-fired power plants grind the coal to a powder before burning it and the resulting fly ash is removed from the plant’s exhaust gases and collected for use. steament® is Evonik Power Minerals’ brand of high quality fly ash, which is ready for use in the production of construction materials. A by-product of coal-fired electricity generation, it complies with all the relevant industry standards regarding quality. The high quality of steament® is regularly monitored by accredited external testing laboratories, as well as our own building materials laboratory. At Evonik Power Minerals, we draw on over thirty years’ experience of providing the highest quality of fly ash for the construction industry and our fly ash concrete has a number of useful features, including ease of use, improved finish, and greater strength, durability and reliability. steament® is suitable for a wide range of applications: • Ready-mixed concrete – find out more • Concrete goods – find out more• Precast concrete parts – find out more• Earthworks and road construction - find out more• Sulphate-resistant concrete – find out more• Self-compacting concrete – find out more Ready-mixed concrete Due to its material characteristics, steament® coal fly ash improves the performance of both fresh and hardened concrete. Concrete containing fly ash has a better flow behaviour and density. The addition of fly ash improves the pumpability of concrete and reduces heating due to hydration reaction. Concrete goods Concrete goods are prefabricated parts, such as paving stones and products for garden and landscape design. These are normally produced as earth-moist concretes and are subject to the requirements of both concrete technology and soil mechanics. In order to achieve a high particle density of the concrete and the necessary green and final strength, coal fly ash is used as a concrete additive. Decisive factors are the pozzolanic reactivity, the spherical grain shape and the grain-size distribution of the fly ash. Precast concrete parts Precast concrete parts are supporting construction elements. This leads to high demands on the strength and durability of the concrete. The use of coal fly ash according to the standards of DIN EN 450, in combination with other carefully selected concrete additives, allows the production of concretes that meet quality requirements for the production of precast parts. On account of its pozzolanic effect, fly ash can replace a proportion of the cement in the concrete mixture. Its spherical grain shape helps reduce the internal friction of the concrete and thus improves its compactibility. Earthworks and road construction In earthworks and road construction, coal fly ash is primarily used in a moistened state. The earthworks-related and physical properties of the fly ash play an important role here. By adjusting the optimal Proctor density, the moistened fly ash can be compacted so well that the surfaces can be immediately driven on by heavy vehicles. The use of fly ash in earthworks and road construction is closely regulated and we ensure that our fly ash meets or exceeds these requirements. Sulphate-resistant concrete The denser and the more waterproof a concrete is, the higher is its resistance against attack by sulphates. The addition of fly ash to a concrete increases its sulphate resistance. The fly ash reduces the porosity of concrete, and its spherical grain shape increases the density of the internal structure of concrete. The sulphate resistance plays an important role, for example in the production of sewage pipes and in foundation construction, because these objects are often exposed to water or soils that contain sulphates. Self-compacting concrete Self-compacting concrete must be capable of flowing easily. Without further assistance, the concrete is supposed to fill a formwork of any shape without leaving any cavities, to enclose the reinforcement and to deaerate and level itself. At the same time, the properties of the hardened concrete must be as good as those of a standard concrete. The spherical grain shape of the fly ash improves the embedding of the mineral grains in the concrete so that they can be transported more easily.
steament® is Evonik Power Minerals’ brand of high quality fly ash, which is ready for use in the production of construction materials. A by-product of coal-fired electricity generation, it complies with all the relevant industry standards regarding quality.
The high quality of steament® is regularly monitored by accredited external testing laboratories, as well as our own building materials laboratory.
At Evonik Power Minerals, we draw on over thirty years’ experience of providing the highest quality of fly ash for the construction industry and our fly ash concrete has a number of useful features, including ease of use, improved finish, and greater strength, durability and reliability.
steament® is suitable for a wide range of applications:
• Ready-mixed concrete – find out more • Concrete goods – find out more• Precast concrete parts – find out more• Earthworks and road construction - find out more• Sulphate-resistant concrete – find out more• Self-compacting concrete – find out more
Ready-mixed concrete
Due to its material characteristics, steament® coal fly ash improves the performance of both fresh and hardened concrete. Concrete containing fly ash has a better flow behaviour and density. The addition of fly ash improves the pumpability of concrete and reduces heating due to hydration reaction.
Concrete goods
Concrete goods are prefabricated parts, such as paving stones and products for garden and landscape design. These are normally produced as earth-moist concretes and are subject to the requirements of both concrete technology and soil mechanics. In order to achieve a high particle density of the concrete and the necessary green and final strength, coal fly ash is used as a concrete additive. Decisive factors are the pozzolanic reactivity, the spherical grain shape and the grain-size distribution of the fly ash.
Precast concrete parts
Precast concrete parts are supporting construction elements. This leads to high demands on the strength and durability of the concrete. The use of coal fly ash according to the standards of DIN EN 450, in combination with other carefully selected concrete additives, allows the production of concretes that meet quality requirements for the production of precast parts. On account of its pozzolanic effect, fly ash can replace a proportion of the cement in the concrete mixture. Its spherical grain shape helps reduce the internal friction of the concrete and thus improves its compactibility.
Earthworks and road construction
In earthworks and road construction, coal fly ash is primarily used in a moistened state. The earthworks-related and physical properties of the fly ash play an important role here. By adjusting the optimal Proctor density, the moistened fly ash can be compacted so well that the surfaces can be immediately driven on by heavy vehicles. The use of fly ash in earthworks and road construction is closely regulated and we ensure that our fly ash meets or exceeds these requirements.
Sulphate-resistant concrete
The denser and the more waterproof a concrete is, the higher is its resistance against attack by sulphates. The addition of fly ash to a concrete increases its sulphate resistance. The fly ash reduces the porosity of concrete, and its spherical grain shape increases the density of the internal structure of concrete. The sulphate resistance plays an important role, for example in the production of sewage pipes and in foundation construction, because these objects are often exposed to water or soils that contain sulphates.
Self-compacting concrete
Self-compacting concrete must be capable of flowing easily. Without further assistance, the concrete is supposed to fill a formwork of any shape without leaving any cavities, to enclose the reinforcement and to deaerate and level itself. At the same time, the properties of the hardened concrete must be as good as those of a standard concrete. The spherical grain shape of the fly ash improves the embedding of the mineral grains in the concrete so that they can be transported more easily.