Sustainable siderurgic/recycled-aggregate high-performance roller-compacted concrete

New and innovative aspects

Roller compacted concrete manufactured with recovered components obtained from other processes or substances, such as by-products from the steel industry (iron and steel concrete) or waste from the precast concrete industry (sustainable concrete) that increase its sustainability.

The use of construction waste and by-products from the steel industry gives these concretes an innovative installation process, achieving the same technical characteristics as self-compacting concretes whose composition is based on the use of fractions with natural aggregate with additional technical and economic advantages.

The dosage of iron and steel concrete with a dry consistency is shown in Table 1:

Table 1. Dosage of dry steel concrete mixes (kg/m3)

(M: metallic fibers; P: plastic fibers)

The dosage of sustainable dry consistency concrete is shown in Table 2:

Table 2. Dosage of dry sustainable concrete mixes (kg/m3)

(M: metallic fibers; P: plastic fibers)

Main advantages of its use

• Roller-compacted concrete of high workability, easily pumpable and great self-compactability.
• Reduction of energy consumption in the production stages minimizing and increase of yields in its implementation.
• Elimination of vibratiuon reducing fuel consumption and CO2 emissions.
• Recycling of slag from electric arc furnaces in the case of roller-compacted siderurgic concrete.
• Recycling of concrete aggregate in the case of roller compacted recycled-aggregate concrete.
• High resistance to cracking due to the inclusion of metallic and / or plastic fibers together with slag from an electric arc furnace.
• Sustainable concrete.

Specifications

The novel roller-compacted dry concretes comply with international EN 206 specifications and EFNARC recommendations.

The properties in the fresh state of the different mixtures of the iron and steel concrete of dry consistency are shown in table 3:

Table 3. Fresh properties of dry steel concrete

The properties in the fresh state of the different mixes of sustainable concrete of dry consistency are shown in table 4:

Table 4. Properties in fresh state of dry sustainable concrete

The properties in the hardened state of the different mixtures of the iron and steel concrete of dry consistency are shown in table 5:

Table 5. Properties in the hardened state of dry iron and steel concrete

The properties in the hardened state of the different mixtures of the sustainable concrete of dry consistency are shown in table 6:

Table 6. Properties in hardened state of dry sustainable concrete

Applications

• Structural elements subjected to very high loads; beams, columns, floors or walls.
• Pavements.
• Large walls and dams of any type, such as gravity dams, arch or vault.

Intellectual property status

Protected by patent P202030878 and P202030881

Current development status

Developed exclusively in the laboratory and validated for industrialization.

Desired business relationship

Commercial Agreement, License Agreement, Technical Cooperation: further development; Technical Cooperation: testing new applications; Technical Cooperation: adaptation to specific needs.