**Preface to "Properties and Performance of Concrete Materials and Structures"**

The collection of papers published in this Special Issue introduces the current research on the properties and performance of concrete materials and structures.

The objective of the Special Issue is to publish scientists and engineers from around the world, presenting the latest developments in the fields of concrete engineering, mechanics and computation. The papers published in this Special Issue present a discussion of the modern and future trends in experimental, analytical and numerical investigations on concrete materials and structures. This Special Issue also provides an opportunity to disseminate interdisciplinary knowledge among researchers and civil engineers from around the world.

The main topics covered in the accepted papers include the following:

1. Mechanical properties, durability and microstructure of cement-based materials containing different waste materials.

2. Mechanical and microstructural properties, and a durability assessment of high-performance concrete.

3. Mechanical properties of self-compacting steel-fiber-reinforced concrete.

4. Dynamic properties of carbon-nanofiber-reinforced concrete.

5. Models and numerical simulations for concrete-containing supplementary cementitious materials and steel fibers.

6. Application of carbon-fiber-reinforced polymer materials as partial-depth concrete beam repair.

7. Behavior and application of pre-stressed high-performance concrete bridge beams.

8. Analytical and numerical models for framed tube structures.

Particular thanks are due to all authors of the published papers. Grateful thanks are also extended to peer reviewers for their significant help in reviewing the papers and sharing their extensive knowledge and experience in their comments and concerns. The tireless efforts of the management and staff at MDPI in their editorial support in the implementation of this project are highly appreciated.

We sincerely hope that the papers published in this Special Issue will contribute to the development of science and technology in the field of concrete materials and structures.

#### **Piotr Smarzewski and Adam Stolarski**

*Editors*
