Article
Materials Science, Multidisciplinary
Karol Federowicz, Mateusz Techman, Szymon Skibicki, Mehdi Chougan, Ahmed M. El-Khayatt, H. A. Saudi, Jaroslaw Blyszko, Mohamed Abd Elrahman, Sang-Yeop Chung, Pawel Sikora
Summary: The main objective of this study is to develop 3D printed heavyweight concrete using magnetite aggregate to enhance its properties. The results show that the inclusion of magnetite aggregate increases the strength of the concrete and improves its porosity. Additionally, the introduction of magnetite aggregate improves the shielding performance of the material against slow neutrons.
MATERIALS & DESIGN
(2023)
Review
Construction & Building Technology
Cheah Chee Ban, Mohammed A. Khalaf, Mahyuddin Ramli, Naser M. Ahmed, Muntaser S. Ahmad, Amal Mohamed Ahmed Ali, Eethar Thanon Dawood, Farshad Ameri
Summary: Heavy weight concrete (HWC) is widely used in special infrastructures such as nuclear power, medical, nuclear science, and industrial facilities for its ability to effectively attenuate harmful radiation. However, current research faces limitations and challenges in cost efficiency, material combinations, and improving performance that need further study and optimization.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Lincheng Luo, Zhenfu Chen, Qiuwang Tao, Liping Xie, Dan Jin, Zhujing Li, Du Deng
Summary: The effects of high temperatures on the properties of radiation shielding concrete were investigated in this study. It was found that the relative velocity and damage index had a good correlation with the splitting tensile strength, indicating their potential for accurately assessing the failure of concrete under high temperatures. Additionally, severe spalling was observed in the barite concrete at 450 degrees Celsius, while the magnetite concrete exhibited better thermal stability and shielding performance.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Environmental
Yongheum Jo, Krassimir Garbev, Nese Cevirim-Papaioannou, Oliver Dieste Blanco, Benny de Blochouse, Marcus Altmaier, Xavier Gaona
Summary: This study investigates the behavior of the radioactive isotope 94Nb generated in structural materials of nuclear reactors. The research reveals that the solubility of niobium is influenced by the solid phases in the process of disposing 94Nb waste using cementitious materials. The experimental results demonstrate the impact of pH value and calcium concentration on the solubility of niobium in simulated pore water.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Construction & Building Technology
Peng Zhang, Janelle Branch Lewis, Ofra Klein-BenDavid, Andrew C. Garrabrants, Rossane Delapp, Hans A. van der Sloot, David S. Kosson
Summary: This study investigated the effects of environmental CO2 concentration and relative humidity on the carbonation of Cast Stone, finding that different humidity levels and CO2 concentrations had different impacts on the carbonation reaction. Carbonation reactions increased the drying rate of Cast Stone and redistribution of sodium towards the wetting front was observed under drying and carbonation conditions.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Construction & Building Technology
Matan E. Shiner, Ofra Klein-BenDavid, Emilie L'Hopital, Alexandre Dauzeres, Mejdi Neji, Nadya Teutsch, Alva Peled, Gabriela Bar-Nes
Summary: The study aims to identify the phases controlling strontium immobilization in Ordinary Portland Cement (OPC) matrices. Experimental results show that OPC pastes exhibit better strontium retention compared to model systems, suggesting that minor phases (such as ettringite and AFm) can improve strontium retention.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Environmental Sciences
E. Phillip, K. S. Khoo, M. A. W. Yusof, R. O. Abdel Rahman
Summary: The study introduced the green application of POFA in the backfill barrier of DSRS borehole disposal facility. Experimental results showed that 30% POFA replacement improved geochemical conditions and enhanced Ra-226 confinement performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Construction & Building Technology
Mohammed A. Khalaf, Chee Ban Cheah, Mahyuddin Ramli, Naser M. Ahmed, Abdullah Al-Shwaiter
Summary: The addition of 1.5% nano zinc oxide and 3% nano-silica enhances gamma-ray shielding and compressive strength of concrete by 16.3% and 6.6% respectively compared to the control mix at 28 days. Furthermore, all mechanical and fluid transport properties of the concrete were improved. The combined use of nano-silica and nano zinc oxide is suitable to enhance mechanical strength, fluid transport, and high energy radiation attenuation performance of steel furnace-slag heavyweight concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Elham Mansoori, Jalil Morshedian, Mohammad Reza Rostami Darounkola
Summary: In this study, lead-free polymer composite panels with new special formulations were prepared to prevent radiation leakage. By adding a large amount of barium sulfate and polyester resin as a binder, the physical, mechanical, and thermal properties of the composite panels were improved. The panels containing higher percentages of barium sulfate exhibited higher strength and thermal stability, and their attenuation coefficient increased while the HVL and TVL values decreased. These non-toxic composite shielding materials provide a radiation shielding solution for wall panel manufacturing.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Seong Kyum Kim, Hee Jun Yang
Summary: This study investigated the neutron shielding performance of cement mortar with different replacement ratios of LCD waste glass powder. Experimental results showed that LCD waste glass powder enhanced the strength and thermal neutron shielding of mortar, making it a potential alternative for radiation shielding applications.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
J. Bonnet, R. Mosser-Ruck, J. Sterpenich, F. Bourdelle, H. Verron, N. Michau, X. Bourbon, Y. Linard
Summary: This paper presents the chemical and mineralogical characterizations of a cementitious material and its behavior to temperature increase. The results show that the mineralogical composition of the material evolves during setting and heating, leading to the formation of new minerals.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Engineering, Environmental
Varsha Agrawal, Rini Paulose, Rahul Arya, Gaurav Rajak, Abhishek Giri, Abhijit Bijanu, Sunil K. Sanghi, Deepti Mishra, N. Prasanth, Anup Kumar Khare, Varsha Parmar, Mohammed Akram Khan, Abhay Bhisikar, Avanish Kumar Srivastava, Shabi Thankaraj
Summary: The study successfully converted iron-rich red mud into diagnostic X-ray shielding tiles by adding barium sulfate and binders, demonstrating sufficient impact strength and flexural strength suitable for wall applications. The red mud tiles were found to possess attenuation equivalent to lead at certain x-ray voltages, with minimal leaching of heavy elements, making them a safer alternative to toxic lead sheets for protecting against radiation hazards in medical settings.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Mattia Lopresti, Luca Palin, Gabriele Alberto, Simone Cantamessa, Marco Milanesio
Summary: The study explored the control of sedimentation process by using finer barite sources and grinding procedure, and the effectiveness of incorporating functionalized additives into epoxy resin to improve dispersibility and mechanical properties. Stearic acid coating played a key role in eliminating sedimentation while maintaining good mechanical properties.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Construction & Building Technology
Hamideh Mehdizadeh, Xiongfei Cheng, Kim Hung Mo, Tung-Chai Ling
Summary: This study aims to improve the quality of waste hydrated cement paste powders and investigate their possible use as new supplementary cementitious materials (SCMs) through CO2 pre-treatment. The results show that carbonation can enhance the compressive strength of the cement paste and change the silicate network. The carbonated waste powders can be used as new SCMs up to 30% without compromising the 28-day strength.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Nuclear Science & Technology
Ahmed S. Ouda
Summary: The study employed PFA to enhance the physical and mechanical properties of DCW-alkali-activated geopolymer samples, and demonstrated superior performance in attenuation of gamma rays through shield materials.
PROGRESS IN NUCLEAR ENERGY
(2021)
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)