Sustainable Approaches to Building Repair—2nd Edition

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

Deadline for manuscript submissions: 30 September 2026 | Viewed by 303

Special Issue Editors


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Guest Editor
School of Civil Engineering, Qingdao University of Technology, Qingdao 266525, China
Interests: super ductile repair materials; molecular design and bionic intelligent manufacturing; self-sensing building materials; multifunctional materials; low-carbon materials
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Guest Editor
School of Civil Engineering and Architecture, Qingdao Agricultural University, Qingdao 266109, China
Interests: intelligent construction; underwater; steel-reinforced 3D-printed concrete; machine vision detection technology; solid waste resource utilization applications

Special Issue Information

Dear Colleagues,

Concrete structures serve as the backbone of transportation infrastructure, supporting the construction of modern, high-quality, three-dimensional transportation networks and facilitating coordinated development in western and coastal regions. With the rapid development of the global economy, many concrete infrastructure projects built in the 1980s, 1990s, and even in the early 21st century are facing the deterioration of their safety and durability due to the coupling effects of natural and human factors. This poses threats and challenges to national safety and production, necessitating urgent repair and reinforcement.

Cement concrete materials suffer from drawbacks, such as brittleness, low tensile strength, poor bonding, and insufficient durability, making it difficult to meet the repair demands of high-quality building structures. Faced with the reality of deteriorating performances in a large number of existing structures, there is an urgent need to overcome the core technical bottlenecks in the field of repair materials and improve the performance of concrete repair materials.

In this Special Issue, we hope to collect papers that promote various disruptive technologies in building materials, covering multiple topics related to material design and preparation, structural reinforcement and life extension, and innovative approaches for monitoring building health. Additionally, this Special Issue aims to address the application of repair and renovation techniques for innovative buildings.

The aim of this Special Issue is to explore experimental, numerical, analytical, environmental, and economic tools that can help overcome barriers in the field of building repair, detection, and reinforcement.

Dr. Bo Pang
Dr. Yidong Chen
Guest Editors

Manuscript Submission Information

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Keywords

  • repair materials
  • restoration
  • remodeling
  • polymer
  • hydrophobic
  • painting
  • flooring
  • carpentry
  • waterproofing
  • masonry

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Published Papers (1 paper)

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Research

22 pages, 9064 KB  
Article
Study on Properties and Hydration Mechanism of Polymer-Modified High-Belite Sulfoaluminate Cement Repair Mortar
by Liang Wang, Yaning Wu, Chao Guo, Yuanxin Guo, Gongbing Yue and Qiuyi Li
Buildings 2026, 16(12), 2352; https://doi.org/10.3390/buildings16122352 - 12 Jun 2026
Abstract
In this study, the rapidly setting and hardening high-belite sulfoaluminate cement (HBSAC) is used as the cementitious material, with natural river sand as the fine aggregate, and a high-performance repair mortar is prepared through the synergistic use of different polymers and admixtures. The [...] Read more.
In this study, the rapidly setting and hardening high-belite sulfoaluminate cement (HBSAC) is used as the cementitious material, with natural river sand as the fine aggregate, and a high-performance repair mortar is prepared through the synergistic use of different polymers and admixtures. The influences of two polymers (VAE and HPMC) on the working performance, mechanical properties, and hydration characteristics of HBSAC mortars are systematically studied. The results showed that the two polymers had a significant improvement effect on the setting time, mortar flowability, and water retention rate of HBSAC mortar. Among them, VAE had a significant effect on the mortar flowability, and a 5% content could increase the flowability of HBSAC mortar by 29.8%. HPMC has a significant improvement effect on setting time and water retention rate; at 0.1% content, it can delay the initial setting time by 6.5 min and achieve a water retention rate of over 90%. As the polymer to binder ratio increases, both polymers, except for 2.5% VAE, which can slightly improve the flexural strength of mortar, will reduce the flexural and compressive strength of mortar, with VAE causing greater damage to strength. On the contrary, the polymer significantly enhanced the bond strength of the mortar. Compared with the cement control group, the 28 d bond strength of 5% VAE and 0.1% HPMC groups increased by 56.7% and 15.1%, respectively. Moreover, the addition of polymers delayed the occurrence of the exothermic peaks of HBSAC dissolution and ettringite formation, but the total amount of hydration heat released within 48 h was higher than that of pure cement. The diffraction peaks of AFt in the hydration products of VAE-HBSAC paste at 3d and 28d showed significant enhancement, and the peak intensity increased with higher doping levels, while the diffraction peak intensity of C2S showed a certain decrease. The polymer significantly increased the weight loss peak intensity and mass loss after heating of AFt, AH3, AFm, and C-S-H gel. The SEM images indicate that VAE can form a mesh on the surface of hydration products and refine the crystal size of AFt; HPMC wraps more flocculent substances around the hydration products, thereby improving the compactness of paste. This study can provide scientific reference for improving the performance and promoting the practical application of high-performance rapid repair mortar for concrete structure damage. Full article
(This article belongs to the Special Issue Sustainable Approaches to Building Repair—2nd Edition)
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