Characteristics of Ultra-High-Performance Concrete: Latest Advances and Prospects

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Materials, and Repair & Renovation".

Deadline for manuscript submissions: 15 September 2024 | Viewed by 871

Special Issue Editors


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Guest Editor
School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
Interests: concrete durability; ultra-high-performance concrete (UHPC); composite structure; strengthening

E-Mail Website
Guest Editor
School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
Interests: ultra-high performance concrete (UHPC); composite structure; structure strengthening
State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China
Interests: application of UHPC in retrofitting structures; bridge maintenance and structural analysis; long-term structural performance of bridges
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Special Issue Information

Dear Colleagues,

As an advanced building material born at the end of the 20th century, ultra-high-performance concrete (UHPC) is considered to be the most innovative and practical cementitious composite material to emerge in the last 30 years. Optimizing structural dimensions and increasing spanning ability, the service life of engineered structures is greatly enhanced by UHPC due to its characteristics of high strength, high toughness, excellent durability and volumetric stability. The application of UHPC meets the national strategic development requirements of sustainable development, energy conservation and emission reduction.

Recently, with the further exploration of the properties of UHPC materials, as well as structural design and construction technology, the research related to UHPC materials and structures has been gradually perfected. However, traditional civil engineering materials (e.g., normal-strength concrete) are still far from being replaced by UHPC in large areas in practical engineering applications. High material costs, limited design specifications, complex preparation processes, and limited available resources have seriously prevented the application of UHPC in practical engineering.

Therefore, we will need to establish local design standards and specifications oriented to engineering needs, develop sustainable and cost-effective UHPC, and improve construction equipment for UHPC material support in the future. This will render UHPC a viable solution for improving the sustainability of buildings and other infrastructure components.

We welcome papers on the following and related topics, including but not limited to:

  • Definition, properties and development of UHPC;
  • Optimization of UHPC components and mixture design;
  • Eco-friendly and cost-effective UHPC materials;
  • UHPC composite structure;
  • Structural retrofitting and rehabilitation of UHPC;
  • Design specifications and standards of UHPC;
  • Applications of UHPC in civil engineering;
  • Further potential studies and challenges of UHPC.

Dr. Zhongya Zhang
Dr. Yang Zou
Dr. Jun Yang
Guest Editors

Manuscript Submission Information

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Keywords

  • ultra-high-performance concrete (UHPC)
  • low-carbon building materials
  • bonding strength
  • composite structure
  • durability
  • strengthening
  • performance improvement

Published Papers (1 paper)

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Research

26 pages, 9865 KiB  
Article
Numerical Simulation Analysis of the Bending Performance of T-Beams Strengthened with Ultra-High-Performance Concrete Based on the CDP Model
by Yu Long, Zhimei Jiang, Kongru Zou, Jiang Du and Jun Yang
Buildings 2024, 14(5), 1284; https://doi.org/10.3390/buildings14051284 - 01 May 2024
Viewed by 134
Abstract
In bridge reinforcement projects, damaged T-beams are the most common objects for reinforcement, yet the interface bonding and bending performance of UHPC reinforcement on T-beams have hardly been studied. To ensure the reliability and stability of UHPC-strengthened T-beams in practical applications, this study [...] Read more.
In bridge reinforcement projects, damaged T-beams are the most common objects for reinforcement, yet the interface bonding and bending performance of UHPC reinforcement on T-beams have hardly been studied. To ensure the reliability and stability of UHPC-strengthened T-beams in practical applications, this study introduced a post-installed rebar bonding technique to efficiently connect T-beams with UHPC layers. Initially, using ABAQUS software [2020 version] for finite element simulation, this study investigated the effects of various post-installed rebar parameters (horizontal spacing, yield strength, diameter, and matrix concrete strength) on the shear performance of the UHPC and RC interface, obtaining the optimal connection parameters. Subsequently, by comparing shear formulas in domestic and international standards, a new UHPC-RC steel bar interface shear strength theoretical formula with 93.6% accuracy was derived. Finally, finite element simulations analyzed the impact of different post-installed reinforcing bar layout forms and longitudinal spacing, as well as UHPC-strengthened location and layer thickness, on the bending performance of damaged T-beams. The results showed a good match between simulation outcomes and experimental results, applicable for further reinforcement analysis of T-beams. When the horizontal spacing of post-installed rebars is 12d, with diameters ranging from 10 mm to 14 mm, their anchoring capability is efficiently utilized. A square form of a post-installed rebar with a longitudinal spacing of 300 mm effectively improves the ultimate bending load capacity of the strengthened beam. The simulation analysis and theoretical results help in the design and application of post-installed steel connections and UHPC-strengthened structures in UHPC-strengthened reinforced concrete T-beam structures. Full article
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