Self-compacting concrete with recycled concrete aggregate and low shrinkage is characterized by its composition based on Portland cement as first binder, ground granulated blast furnace slag as second binder, and ladle furnace slag as third binder. Its innovative composition and installation procedure allow achieving excellent durability, sustainability and aesthetic results.
New and innovative aspects
The use of construction wastes 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 natural aggregate with additional technical and economic advantages.
Its dosage is shown in Table 1:
CEM I 52.5 R
Ladle furnace slag
Ground granuatled blast furnace slag
Recycled concrete aggregate (< 0.50 mm)
Coarse recycled concrete aggregate
Fine recycled concrete aggregate
Table 1. Composition of mixtures (kg/m3)
Use of waste for the production of sustainable self-compacting concrete optimal for structural use.
Main advantages of its use
- Great flowability and ease of filling formworks of structures with complicated shapes.
- Elimination of the pre-soaking stage in the recycled aggregate.
- Highly self-compactability of concrete. Compaction without vibration.
- Homogeneous finishes without imperfections.
- Economic and sustainable placement by using waste from the precast-concrete industry and by-products from the steel industry known as slag.
- Reduction of energy consumption in its implementation.
- Excellent physical and mechanical properties.
The new self-compacting concretes fulfill the international specifications EN 206 and the recommendations of the EFNARC.
Time since kneading (min)
Slump flow (mm)
Empting time V-funnel test (s)
Blocking ratio, L-box test
Resistance to segregation (%)
Fresh density (Mg/m3)
Occluded air (%)
Table 2. Properties in fresh state
SF: class of runoff, VS: viscosity in flow, VF; viscosity in the V-funnel test, PA; passsing ability & SR; segregation
Compressive strength on cubic specimen (MPa)
Hardened Density (Mg/m3)
Modulus of elasticity (GPa)
Setting shrinkage (mm/m)
Long-term shrinkage (mm/m)
Table 3. Properties in hardened state
- On site application by pouring, pumping or injection.
- Manufacture of concrete pieces with complicated shapes with high aesthetic requirements.
- Foundations and structures.
- Heavily armed structures.
- Construction of large infrastructures such as bridges or tunnels where compaction is complicated.
- Construction with difficult access and high-rise buildings.
Intellectual property status
Protected by patent P202030748
Current development status
Developed, validated and ready to use.
Desired business relationship
Commercial Agreement, License Agreement, Technical Cooperation: further development; Technical Cooperation: testing new applications; Technical Cooperation: adaptation to specific needs.