concrete

Introduction

Concrete is a fundamental material in construction, known for its versatility and durability. However, the need for improved performance, sustainability, and innovative applications has driven extensive research into various types of concrete, including self-compacting concrete, high-performance fiber-reinforced concrete, and the use of recycled materials.

Key Insights

Self-Compacting Concrete (SCC)
- SCC was developed to address the issue of reduced skilled labor in construction, allowing concrete to compact under its own weight without the need for vibration, thus ensuring durability and quality.
Environmental Impact and Sustainability
- Concrete's significant energy and CO2 footprint necessitates improvements for better environmental performance. Small enhancements can have a large impact due to the vast quantities of concrete used globally .
- The use of recycled aggregates and fibers in concrete can reduce waste and conserve resources, contributing to sustainability .
High-Performance Fiber-Reinforced Concrete (HPFRC)
- Incorporating fibers into concrete improves mechanical properties such as tensile strength, flexural strength, and ductility. It also reduces shrinkage and creep deformations, although it may negatively affect workability and electrical resistivity .
Recycled Aggregates and Fibers
- Concrete with recycled coarse aggregates performs comparably to conventional concrete if quality aggregates are used and specific design rules are followed.
- Fine recycled aggregates, such as crushed concrete and brick, can be used in concrete mixes, though they may reduce strength. However, concrete with up to 50% recycled brick aggregate shows similar long-term strength to control mixes.
- Recycled fibers from various sources (e.g., tire cords, carpet fibers) can enhance concrete's toughness, shrinkage, and durability.
Innovations in Concrete Technology
- Modern concrete incorporates mineral components, chemical admixtures, and fibers, leading to the development of "smart concretes" tailored for specific applications.
- Digital technologies and robotic fabrication methods are emerging as key innovations, enabling new forms of reinforcement and optimized concrete structures.

Conclusion

Research into concrete has led to significant advancements in self-compacting concrete, high-performance fiber-reinforced concrete, and the use of recycled materials. These innovations not only improve the mechanical properties and durability of concrete but also address environmental concerns by reducing waste and conserving resources. The integration of digital technologies and new fabrication methods promises further enhancements in concrete performance and sustainability.

Summary

Introduction

Key Insights

Conclusion

Sources and full results

Self-Compacting Concrete

Self-compacting concrete, which can be compacted by its own weight, can achieve durable concrete structures without the need for skilled workers and reduce construction costs.

Concrete: An eco material that needs to be improved

Concrete's environmental performance can be improved through small steps, such as using recycled materials and reducing energy and CO2 footprints, to significantly reduce its environmental impact.

Reinforced Concrete Structures

This book provides a clear and accessible introduction to reinforced concrete design for non-technical readers, covering the treatment of beams, columns, and slabs, shearing resistance of beams, and materials used.

Cements of yesterday and today Concrete of tomorrow

Modern concrete is evolving, incorporating mineral components, chemical admixtures, and fibers, while also focusing on durability and sustainability.

Properties of concrete incorporating fine recycled aggregate

Concrete containing up to 50% crushed brick exhibits similar long-term strength to that of control, while incorporating fine recycled aggregate reduces strength by up to 10%.

High-performance fiber-reinforced concrete: a review

High-performance fiber-reinforced concrete improves mechanical properties and reduces shrinkage and creep deformations, but may negatively affect workability and electrical resistivity.

Concrete material science: Past, present, and future innovations

Digital technologies, along with robotic fabrication methods, can revolutionize concrete by introducing innovations like rebar-free reinforcement, compression-optimized structures, and truly digital concrete.

Recycled Concrete as Aggregate for Structural Concrete Production

Recycled aggregate concrete (RAC) performs satisfactorily in structural concrete production, with quality recycled concrete coarse aggregate and specific design and production rules needed for satisfactory results.

Resistance of high-strength concrete to projectile impact

High-strength fiber-reinforced concrete with a compressive strength of 100 MPa is the most efficient in protecting against projectile impact, with coarse granite aggregates and steel fibers also contributing to impact resistance.

Concrete Reinforcement with Recycled Fibers

Recycled fibers in concrete reinforcement improve toughness, shrinkage, and durability, while also reducing waste and resources conservation.

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