Sustainable and Low-Carbon Building Materials in Special Areas

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

Deadline for manuscript submissions: closed (30 April 2025) | Viewed by 1953

Special Issue Editors


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Guest Editor
School of Highway, Chang'an University, Xi'an 710064, China
Interests: concrete durability; problematic soil; sustainable materials; soil mechanics; solid waste disposal; foundation engineering
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Department of Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: loess mechanics; disposal of solid waste; contaminant migration
Special Issues, Collections and Topics in MDPI journals
Department of Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: high-performance concrete; waste management; non-clinker cement system
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
School of Civil Engineering, Tianjin University, Tianjin 300072, China
Interests: anchorage foundation; large deformation; soil–structure interaction; helical pile
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Special Issue Information

Dear Colleagues,

The engineering properties of structures, not limited to concrete structures, are controlled by their composition and can also be significantly affected by microstructure and mineral composition changes. Generally, more attention is paid to the durability of structures in special areas, such as saline and salty lake areas. In addition, the bearing capacity and deformation of the foundation in such areas are also influenced by the properties of the surrounding medium, such as problematic soil. In this regard, to better solve problems in special areas, it is of great importance to study the effects of sustainable and low-carbon building materials on the performance of both structures and foundations.

This Special Issue on “Sustainable and Low-Carbon Building Materials in Special Areas” seeks high-quality works on the laboratory testing, field testing, and numerical modeling of sustainable and low-carbon building materials. Topics include, but are not limited to, the following:

  • Concrete durability in special environments;
  • Treatment of soil or foundation in special areas;
  • Utilization of solid waste in building materials;
  • Low-carbon construction methods;
  • Life evaluation or prediction model of structures.

Dr. Gaowen Zhao
Dr. Shifeng Lu
Dr. Gang Liu
Dr. Le Wang
Guest Editors

Manuscript Submission Information

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Keywords

  • concrete durability
  • sustainable materials
  • low-carbon building materials
  • low-carbon construction method
  • soil treatment
  • solid waste disposal

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Published Papers (2 papers)

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Research

19 pages, 5869 KiB  
Article
Impacts of Thermal Activation on Physical Properties of Coal Gangue: Integration of Microstructural and Leaching Data
by Wangtao Fan, Yuan Chen, Runxia Zhang, Xiaoguang Chen, Jin Li, Zhaolin Gu and Jianyun Wang
Buildings 2025, 15(2), 159; https://doi.org/10.3390/buildings15020159 - 8 Jan 2025
Viewed by 662
Abstract
The recycling of coal gangue has considerable potential to produce secondary environmental hazards, which significantly influence the high-end application of coal gangue in practical engineering. The present study investigates the effects of activation treatment on the physical, chemical properties and leaching behavior of [...] Read more.
The recycling of coal gangue has considerable potential to produce secondary environmental hazards, which significantly influence the high-end application of coal gangue in practical engineering. The present study investigates the effects of activation treatment on the physical, chemical properties and leaching behavior of coal gangue. The mineral composition, micro-pore structure and element leaching were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Thermogravimetry Analysis (TG), Low-Temperature Nitrogen Adsorption (LTNA) and Inductively Coupled Plasma (ICP). The results indicate that kaolinite and pyrite in coal gangue experienced reconstruction after 600 °C during thermal activation. The density of thermally activated coal gangue is increased with the calcination temperature as well as the alkalinity (from 4.8–7.1) due to the burning of organic and the oxidation of pyrite. The calcination treatment induced the reduction in macropore volume (>50 nm), and enhancement in mesopore (<5 nm) volume. Leachable Ni, Cd, Mn, Cu, Zn and Pd decreased by 99%, 67%, 86%, 40%, 99% and 93% after calcination at 800 °C, respectively. The Si and Al in 800 °C calcined coal gangue exhibited a high leaching ability in alkalinity solution; leachable Al reached 106.4 mg/kg, while leachable Si reached 86.1 mg/kg after 48 h of dynamic leaching. Full article
(This article belongs to the Special Issue Sustainable and Low-Carbon Building Materials in Special Areas)
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21 pages, 10237 KiB  
Article
Eco-Friendly Improvement of Comprehensive Engineering Properties of Collapsible Loess Using Guar Gum Biopolymer
by Yuesong Zheng, Tianhao Li, Daokun Qi, Xiaojuan Xi, Fengzu Peng, Shijun Ding, Zhibao Nie, Xin Hu, Gaowen Zhao, Bo Xiao, Yake Tang and Wenhui Wang
Buildings 2024, 14(12), 3804; https://doi.org/10.3390/buildings14123804 - 28 Nov 2024
Cited by 1 | Viewed by 708
Abstract
Collapsible loess is characterized by its unique soil-forming environment, mineral composition, and microstructure, resulting in poor engineering properties such as high water sensitivity, high collapsibility, high compressibility, and low strength. To improve the poor engineering properties of collapsible loess, we selected a suitable [...] Read more.
Collapsible loess is characterized by its unique soil-forming environment, mineral composition, and microstructure, resulting in poor engineering properties such as high water sensitivity, high collapsibility, high compressibility, and low strength. To improve the poor engineering properties of collapsible loess, we selected a suitable eco-friendly material—guar gum (GG)—for its improvement and reinforcement, and investigated the improvement effect of different GG dosages (0.5~1.5%) and curing ages (0~28 days) on collapsible loess. The mechanical properties of soil samples were determined by direct shear tests, unconfined compressive strength tests, and splitting tests. The water stability of soil samples was evaluated by both cube and sphere crumb tests. SEM and EDS analyses were also conducted to determine the microstructural and mineral changes in soil. The results indicate that the incorporation of GG is beneficial to inhibit the collapsibility of the soil and improves the water stability and strength of the soil. The collapsibility coefficient of loess is reduced to below 0.015 when 0.75% and above of GG is admixed, which is considered a complete loss of its collapsibility. When the GG dosage increases from 0% to 1.25%, the compressive strength and tensile strength of the soil samples increase by 43.5% and 34.9%, respectively. However, by further increasing the GG dosage to 1.5%, the compressive strength and tensile strength decrease by 3.8% and 6% compared to those with 1.25% GG. This indicates that the strength of the specimens shows an increasing trend and then a decreasing trend with the increase in GG dosage, and 1.25% GG was found to be the best modified dosage. Microstructural and mineral analyses indicate that the addition of GG does not change the mineral composition of loess, but, rather, it significantly promotes the agglomeration and bonding of soil particles through cross-linking with Ca2+ ions in the soil to form a biopolymer network, thus achieving a reliable reinforcement effect. Compared with the existing traditional stabilizers, GG is a sustainable and eco-friendly modified material with a higher low-carbon value. Therefore, it is very necessary to mix GG into collapsible loess to eliminate some of the poor engineering properties of loess to meet engineering needs. This study can provide test support for the application and promotion of GG-modified loess in water agriculture and road engineering. Full article
(This article belongs to the Special Issue Sustainable and Low-Carbon Building Materials in Special Areas)
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