Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
3.1
3.8
Journals
Buildings
Special Issues
Study on Mechanical Properties of Civil Engineering Materials
share announcement

Study on Mechanical Properties of Civil Engineering Materials

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 (20 February 2024) | Viewed by 2881

Special Issue Editors

Prof. Dr. Xiaowei Gu

E-Mail Website
Guest Editor
College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
Interests: recycling of solid waste; supplementary cementitious material; green concrete; mechanical activation; alkali-activated cementing materials; mine filling
Prof. Dr. Jianping Liu

E-Mail Website
Guest Editor
School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, China
Interests: recycling of solid waste; supplementary cementitious material; green concrete; mechanical activation; alkali-activated cementing materials

Special Issue Information

Dear Colleagues,

Civil engineering materials play a pivotal role in ensuring the functionality and longevity of structures. These materials are subjected to a wide array of influential forces that can significantly impact their mechanical properties, leading to deterioration in stiffness, strength, and even the potential for extensive damage to critical structural components. This susceptibility arises from various sources, encompassing both environmental factors like prolonged vibrations and seismic events, as well as unexpected incidents like fires, explosions, or impacts. Irrespective of the origin and magnitude of the inflicted damage, the mitigation of subsequent structural repercussions is of paramount importance.

The ability to effectively manage the aftermath of such destructive influences hinges upon timely rehabilitation, judicious strengthening of existing structures, or the meticulous design of new structures that can adeptly withstand such exigencies. In this context, this Special Issue welcomes authors to contribute their scholarly work, featuring original research papers that delve into novel advancements, ongoing project case studies, and comprehensive reviews pertaining to the mechanical behavior of civil engineering materials under diverse scenarios. Whether the focus is on environmental actions, dynamic loads, or extreme conditions such as fire, explosion, or earthquake, these papers may introduce innovative design methodologies aimed at minimizing structural vulnerabilities, propose inventive rehabilitation strategies, introduce cutting-edge assessment and upgrading techniques, and elucidate controlled demolition protocols tailored for severely compromised structures.

Prof. Dr. Xiaowei Gu
Prof. Dr. Jianping Liu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Buildings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • recycling of solid waste
  • supplementary cementitious material
  • green concrete
  • mechanical activation
  • alkali-activated cementing materials
  • mine filling

Published Papers (3 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

15 pages, 3214 KiB  
Article
Effect of Diethanol-Isopropanolamine and Typical Supplementary Cementitious Materials on the Hydration Mechanism of BOF Slag Cement Pastes
by Hongyu Wang, Xiaowei Gu, Xiaochuan Xu, Jianping Liu, Zhenguo Zhu and Shenyu Wang
Buildings 2024, 14(5), 1268; https://doi.org/10.3390/buildings14051268 - 1 May 2024
Viewed by 453
Abstract
This study investigated the effects of lithium slag and iron tailings on the hydration mechanism of Basic Oxygen Furnace (BOF) slag cement paste with the addition of 0.06% diethanol-isopropanolamine (DEIPA). This study examined the fluidity, compressive strength, pore solution pH, and hydration products [...] Read more.
This study investigated the effects of lithium slag and iron tailings on the hydration mechanism of Basic Oxygen Furnace (BOF) slag cement paste with the addition of 0.06% diethanol-isopropanolamine (DEIPA). This study examined the fluidity, compressive strength, pore solution pH, and hydration products of BOF slag-based composite cementitious materials. The results showed that DEIPA facilitated the conversion from ettringite (AFt) to monosulphate (AFm) and improved the early compressive strength of the BOF slag–cement mortar. Incorporating lithium slag into the DEIPA-containing BOF slag–cement system promoted AFt formation, increased calcium-silicate-hydrate production, and enhanced the microstructure. BOF slag, lithium slag, and iron tailings exhibit synergistic effects in cement pastes. BOF slag and lithium slag provided the reactive components SiO2 and Al2O3. In the early hydration stages, the iron tailings primarily served as fillers, accelerating the system’s reactions. Full article
(This article belongs to the Special Issue Study on Mechanical Properties of Civil Engineering Materials)
►▼ Show Figures

Figure 1

15 pages, 6649 KiB  
Article
Study on the Properties and Hydration Mechanism of Calcium Carbide Residue-Based Low-Carbon Cementitious Materials
by Qing Wang, Ying Wang, Xiaowei Gu, Jianping Liu and Xiaochuan Xu
Buildings 2024, 14(5), 1259; https://doi.org/10.3390/buildings14051259 - 30 Apr 2024
Viewed by 396
Abstract
Alkali-activated cementitious materials, as an environmentally friendly cementitious material, can effectively reduce carbon emissions and improve the utilisation of solid wastes. However, traditional strong alkali activators have limitations such as high carbon emissions and poor safety. In order to overcome the defects of [...] Read more.
Alkali-activated cementitious materials, as an environmentally friendly cementitious material, can effectively reduce carbon emissions and improve the utilisation of solid wastes. However, traditional strong alkali activators have limitations such as high carbon emissions and poor safety. In order to overcome the defects of traditional strong alkaline activators and realise the high value-added use of calcium carbide residue (CCR), this paper adopts CCR as an alkaline activator to activate granulated blast furnace slag (GBFS)-steel slag (SS) cementitious systems for the preparation of alkaline-activated cementitious materials. The effects of CCR content and SS content on the compressive strength and working performance of CCR-GBFS-SS cementitious systems are analysed, along with the hydration process of CCR-GBFS-SS cementitious systems and the mechanism of action through the hydration products, their chemical structure and their microscopic morphology. The research results show that CCR-GBFS-SS cementitious systems have a 28-day compressive strength of 41.5 MPa and they can be controlled by the setting time; however, the flow performance is poor. The SS content can be increased to improve the flow performance; however, this will reduce the compressive strength. In CCR-GBFS-SS cementitious systems, CCR is the main driving force of hydration reactions, GBFS mainly provides active silica and aluminium and the amorphous C-(A)-S-H gel and ettringite formed by the synergistic action of multiple solid wastes are the main sources of compressive strength. With the extension of the curing time, the amount of hydration products in the cementitious systems gradually increases and the matrix of the cementitious systems gradually becomes denser. This study will provide a reference for the consumption of low-value solid waste such as CCR and the preparation of low-carbon cementitious materials from multi-component solid wastes. Full article
(This article belongs to the Special Issue Study on Mechanical Properties of Civil Engineering Materials)
►▼ Show Figures

Figure 1

15 pages, 3938 KiB  
Article
The Role of Chemical Activation in Strengthening Iron Ore Tailings Supplementary Cementitious Materials
by Zhihang Hu, Xiaowei Gu, Baojun Cheng, Qing Wang, Jianping Liu, Xiaowei Ge and Shiqi Yin
Buildings 2024, 14(4), 963; https://doi.org/10.3390/buildings14040963 - 1 Apr 2024
Viewed by 612
Abstract
The preparation of iron ore tailings (IOTs) into supplementary cementitious materials (SCMs) is an effective approach to achieve value-added utilization of industrial solid waste. This study systematically investigates the hydration pattern and strength development of Portland cement systems with the incorporation of IOTs, [...] Read more.
The preparation of iron ore tailings (IOTs) into supplementary cementitious materials (SCMs) is an effective approach to achieve value-added utilization of industrial solid waste. This study systematically investigates the hydration pattern and strength development of Portland cement systems with the incorporation of IOTs, steel slag (SS), granulated blast-furnace slag (GBFS), and fly ash (FA) under the action of different chemical additives. The hydration products, and microstructure and pore structure of the SCMs are analyzed using X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and mercury intrusion porosimetry. The findings of this study demonstrate that chemical activation plays a significant role in the strength development of SCMs. Among the five chemical activators tested, Triethanolamine (TEA) had the greatest influence on mechanical properties. The maximum compressive strength of the SCMs at 28 days was 42.9 MPa at a dosage of 1%. Specifically, the addition of TEA promotes volcanic ash reactions, and the high fineness of SCM provides nucleation sites for hydration products. Interactions between the volcanic ash reaction and the complexation reaction of TEA have a positive effect on compressive strength development. This research expands the potential for IOTs SCMs through chemical activation methods for value-added applications. Full article
(This article belongs to the Special Issue Study on Mechanical Properties of Civil Engineering Materials)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-3
Back to TopTop