Article
Chemistry, Multidisciplinary
Muhammad M. Rahman, David W. Law, Indubhushan Patnaikuni, Chamila Gunasekara, Morteza Tahmasebi Yamchelou
Summary: This study investigated the activation of clay through calcination at different temperatures and durations for the production of alkali-activated material (AAM). The results showed that calcination at 120 and 750 degrees Celsius led to increased strength compared to untreated clay. Specimens with 10% alkali dosage performed better than those with 15%, with the conversion of Al (IV) identified as the primary factor for strength enhancement.
APPLIED SCIENCES-BASEL
(2021)
Article
Environmental Sciences
Ahmed Mohammed Awad Mohammed, Nor Zurairahetty Mohd Yunus, Muhammad Azril Hezmi, Ahmad Safuan A. Rashid, Suksun Horpibulsuk
Summary: This study focuses on the sequestration of CO2 using calcium and magnesium-rich GGBS materials, investigating its impact on soil strength under different carbonation periods and CO2 pressures. Results indicate an increase in soil strength with higher carbonation periods and CO2 pressures, attributed to the carbonated calcium and magnesium products filling soil voids.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Construction & Building Technology
Di Wu, Wei Sun, Shuai Liu, Chunlai Qu
Summary: The study shows that microwave radiation can significantly increase the temperature of CTB, and microwave heating can either enhance or reduce the mechanical performance of CTB samples depending on the delay time and heating time. Combined with conventional curing, microwave technology can be used to improve the thermo-mechanical performance of mine backfill material.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Ahmad Alzaza, Katja Ohenoja, Mirja Illikainen
Summary: The study investigated the potential of using high-strength one-part alkali-activated blast furnace slag (AAS) in cold weather without supplementary heating systems. It was found that AAS mortar showed higher ultrasonic pulse velocity and compressive strength compared to cement mortar at all curing temperatures, especially with additional room temperature curing.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
A. S. Bature, M. Khorami, E. Ganjian, M. Tyrer
Summary: This paper investigated the compressive strength and microstructure of iron-rich, calcined clay based geopolymer mortars activated by two forms of sodium silicate solutions. The strength of mortars activated in a pressure reactor vessel was significantly higher than those activated under normal atmospheric conditions.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Maria Borrachero, Jordi Paya, Santiago Brito, Yasna Pamela Segura, Lourdes Soriano, Mauro M. Tashima, Jose Maria Monzo
Summary: Construction and demolition waste can be recycled and utilized by alkali-activated cement to improve sustainability and recovery. In this study, the physical and chemical characteristics of construction and demolition waste in Valencia were described, with the main components being CaO, SiO2, and Al2O3. The alkali activation of blends of this waste and blast furnace slag resulted in mortars with high compressive strength. The research concludes that new sustainable binders can be made without the use of Portland cement.
Article
Green & Sustainable Science & Technology
Hammad Tahir, Muhammad Basit Khan, Nasir Shafiq, Dorin Radu, Marijana Hadzima Nyarko, Ahsan Waqar, Hamad R. Almujibah, Omrane Benjeddou
Summary: This study explores the application of glass fibre in concrete to improve its mechanical properties and reduce carbon emissions. It is found that adding 1.25% glass fibre to concrete yields the optimum results for mechanical strength and ultrasonic pulse velocity (UPV). The carbon footprint of concrete is positively correlated with the proportion of glass fibre.
Article
Biochemistry & Molecular Biology
Samar Beaino, Peter El Hage, Rodolphe Sonnier, Sylvain Seif, Roland El Hage
Summary: This study focuses on the synthesis of a new thermal insulating geopolymer using alkaline activation of fly ashes. The addition of foaming agents can be avoided by using a high ratio of solution/ashes. Rice husks are incorporated into the formulation to increase porosity and ecological sustainability. The microstructural characteristics of the geopolymers were analyzed using various techniques, and thermal and mechanical properties were evaluated based on different solution/ashes ratios and rice husk contents.
Article
Green & Sustainable Science & Technology
Jianhua Wang, Siau Chen Chian, Tao Ma, Jianwen Ding
Summary: The primary focus of this study is to investigate the feasibility of stabilizing high water content dredged clay using a ternary alkali-activated material. The results demonstrate that the initial water content significantly affects the mechanical properties of the stabilized clay, with higher initial water content leading to decreased compressive strength. The use of the ternary alkali-activated material can significantly enhance the compressive strength compared to the binary alkali-activated material alone. Microstructure analysis reveals that the formation of gel compounds via polymerization and hydration contributes to the cementation strength, and the presence of ettringite improves the microstructure and strength of the stabilized clay.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Multidisciplinary
Juntong Li, Qing Li, Ping Chen, Kai Yao, Penghuai Wang, Yang Ming, Jin Yi, Lili Zhi
Summary: In this study, Bayer red mud and ground granulated blast furnace slag were used to form alkali-activated cementitious materials (AASR) with different ratios. The effect of red mud content on the mechanical properties of AASR was analyzed by studying the compressive strength. Various testing techniques were used to reveal the influence mechanism of red mud content on the mechanical properties. The results show that the increase of red mud content leads to a decrease in compressive strength by affecting the porosity and hydration reaction process.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Ceramics
Sasui Sasui, Gyuyong Kim, Jeongsoo Nam, Syed Fakhar Alam, Hamin Eu, Yaechan Lee, Mahmood Ahmad
Summary: This study recycled waste concrete by alkali activation of waste concrete powder (WCP), which can efficiently produce alkali-activated cement. The effects of two alkali activators (NaOH and KOH) on the performance of alkali activated WCP cement were discussed. The results showed that NaOH-activated WCP outperformed KOH-activated WCP, and the use of 8 M alkali solutions improved the compressive strength, microstructure, and reactivity of WCP.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Haoyu Wang, Xianhui Zhao, Han Gao, Tiebiao Yuan, Xiao Liu, Wenwen Zhang
Summary: The purpose of this study is to evaluate the effects of recycled alkali-treated plant wastewater (ATPW) from NaOH-treated sisal leaves, poplar leaves, poplar stems, and corn stems on the characteristics and microstructures of alkali-activated composite materials (AACMs) made from solid wastes. The results demonstrate that the effects of ATPWs produced from dead sisal leaves were remarkable on the properties and microstructures of AACMs. Moreover, AACMs physically sequester the organic components of ATPW during the early stage of hardening, and the ATPW serves as a unique physical foaming agent in AACMs.
CERAMICS INTERNATIONAL
(2023)
Review
Green & Sustainable Science & Technology
Janitha Migunthanna, Pathmanathan Rajeev, Jay Sanjayan
Summary: Geopolymer binders using waste clay bricks as a precursor material show promising potential for use in pavement construction as an alternative cementitious material. Blending waste clay bricks with other materials or using them as the sole precursor can enhance the mechanical properties of geopolymer binders. Further research is recommended to explore the development, durability, and field performance of geopolymer concrete.
Article
Green & Sustainable Science & Technology
Pang Chen, Zhaoyue Shi, Shaojun Cao, Ping Liu, Xian Rong, Lida Wang
Summary: This study investigated the mechanical properties of alkali-activated slag lightweight aggregate concrete (AAS-LWAC) and analyzed the effects of lightweight aggregate and fiber materials on its performance.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Construction & Building Technology
Ghita El Boukili, Silvia Erba, Fatima Kifani-Sahban, Asmae Khaldoun
Summary: This study aims to develop a scientific method for adjusting the physicochemical composition of clay soil for construction applications. By adding bentonite, the plasticity of the clay was improved, resulting in enhanced properties and compressive strength close to high-quality bricks.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Environmental Sciences
A. A. H. Faisal, Z. S. Nassir, H. M. Rashid, O. A. Al-Hashimi, A. Shubbar, B. Saleh
Summary: The study thoroughly examined the capability of date stones for scavenging cadmium and lead ions from simulated wastewater. The results showed that the best conditions achieved high sorption efficiency, mainly depending on the initial pH and contact time.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Magomed Muradov, Patryk Kot, Jakub Markiewicz, Slawomir Lapinski, Aleksandra Tobiasz, Katarzyna Onisk, Andy Shaw, Khalid Hashim, Dorota Zawieska, Ghulam Mohi-Ud-Din
Summary: Cultural heritage sites are affected by various factors, including moisture. Current methods for monitoring moisture in cultural heritage sites include both destructive and non-destructive approaches. However, destructive methods can cause surface damage and non-destructive methods have limited penetration capabilities. This study proposes a geo-positioning method for non-destructive moisture assessment using microwave spectroscopy and close-range photogrammetry. Experimental data collected at a cultural heritage site in Poland were analyzed using clustering algorithms, demonstrating clear clusters. The microwave sensing approach provided more detailed moisture information of the measured material compared to pin-type meter measurements that only measured the surface.
Review
Materials Science, Multidisciplinary
Pilomeena Arokiasamy, Mohd Mustafa Al Bakri Abdullah, Shayfull Zamree Abd Rahim, Monower Sadique, Liew Yun Ming, Mohd Arif Anuar Mohd Salleh, Mohd Remy Rozainy Mohd Arif Zainol, Che Mohd Ruzaidi Ghazali
Summary: This paper reviews the raw materials used in the synthesis of geopolymer for wastewater treatment. It aims to develop low cost geopolymer-based adsorbents with great potential for heavy metal adsorption, which can provide dual benefits in waste management and wastewater treatment.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Anmar Dulaimi, Shaker Qaidi, Shakir Al-Busaltan, Abdalrhman Milad, Monower Sadique, Mustafa Amoori Kadhim, Ruqayah Al-Khafaji, Mohanad Muayad Sabri Sabri
Summary: This study aimed to develop rapid-curing emulsified asphalt cold mixes (EACM) with a cementitious filler made from industrial by-product materials. Waste paper sludge ash (PSA) was used as an active filler, and incinerated sewage ash (ISA) was used as an activator. The results showed that the use of waste PSA significantly improved the tensile stiffness modulus (ITSM) and rutting resistance compared to traditional emulsified asphalt cold mixes. The formation of hydration products and rapid demulsification of asphalt emulsion were responsible for the increased ITSM and rutting resistance, minimizing environmental issues and preserving energy.
FRONTIERS IN MATERIALS
(2023)
Review
Engineering, Civil
Max Strohle, Monower Sadique, Anmar Dulaimi, Mustafa Amoori Kadhim
Summary: This paper reviews the current state and potential of 3D concrete printing and analyzes key issues in its development. The study provides researchers and institutions with an in-depth understanding of global trends in 3D concrete printing and assesses its future applications.
INNOVATIVE INFRASTRUCTURE SOLUTIONS
(2023)
Article
Construction & Building Technology
Hazha Mohammed, Francesca Giuntini, Alan Simm, Monower Sadique, Andy Shaw, Ismini Nakouti, Ana Bras
Summary: This research analyzes the performance of three types of polymer-modified concrete in chloride environments and the use of bacteria-based solutions for reinforced concrete structures. The study focuses on the mechanical and durability performance of the concrete. The results show that the recyclable polymers contribute to increased strength and decreased porosity, but also delay the concrete's compressive strength increase. The use of bioproducts effectively controls water migration and reduces chloride migration.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Review
Energy & Fuels
Mohammed Salah Nasr, Awham Jumah Salman, Rusul Jaber Ghayyib, Ali Shubbar, Shahad Al-Mamoori, Zainab Al-khafaji, Tameem Mohammed Hashim, Zaid Ali Hasan, Monower Sadique
Summary: Sustainability and reducing CO2 emissions in the construction sector are important issues worldwide. Researchers have been exploring the use of by-products or waste to reduce cement content in concrete, which is responsible for 7% of global CO2 emissions. Self-compacting concrete (SCC), containing a significant amount of cement, can flow without separating its components. This study reviews previous research on using clay brick waste powder (CBWP) as a substitute for cement in SCC, evaluating its effects on properties and comparing environmental impacts using life cycle assessment (LCA). The study found that the maximum CBWP content without negative effects on concrete properties is 10% by weight of cement, and using CBWP reduces environmental damage by up to 37.5%.
Article
Engineering, Chemical
Mohammed Salah Nasr, Ali Shubbar, Tameem Mohammed Hashim, Aref A. Abadel
Summary: Carbon dioxide emissions from the cement industry are a significant concern due to their environmental impact. Solid waste, including LCD waste glass and used rope waste, poses challenges in terms of decomposition and landfill space. This study explores the potential of reusing glass and rope waste in concrete technology to reduce environmental harm.
Article
Engineering, Civil
Michaela Gkantou, Evangelia Georgantzia, Abdullah Kadhim, George S. Kamaris, Monower Sadique
Summary: This paper proposes a new composite material, combining structural aluminium alloys with low carbon geopolymer concrete, to create a more sustainable and durable structural member. Experimental results demonstrate that the geopolymer concrete-filled aluminium tubular cross-sections have significantly increased strength, making them a suitable choice for composite structural applications.
Article
Multidisciplinary Sciences
Ashwak Falih Kaizal, Jasim Mohammed Salman, Patryk Kot
Summary: This study estimated the concentrations of seven heavy metals in water, sediments, and various aquatic organisms in a specific section of Euphrates River in Iraq. It found that the concentrations of these elements varied in different phases and organisms, providing insights into their fate and transmission through the food chain in this lotic aquatic system.
BAGHDAD SCIENCE JOURNAL
(2023)
Review
Geosciences, Multidisciplinary
Fadhil Al-Darraji, Monower Sadique, Tina Marolt Cebasek, Abhijit Ganguli, Zelong Yu, Khalid Hashim
Summary: Composite piles have become a popular alternative for deep foundations due to their potential to mitigate durability issues. This research evaluates the geotechnical and structural behaviors of fiber-reinforced polymer (FRP) composite piles. Low-stiffness composite materials are a concern, and efforts are being made to improve their properties. Further research is needed to comprehensively understand the behaviors of different types of composite piles.
Article
Construction & Building Technology
Ali Shubbar, Mohammed Salah Nasr, Abdullah Kadhim, Tameem Mohammed Hashim, Monower Sadique
Summary: Permeable pavement, such as permeable interlocking concrete pavement (PICP), can effectively solve pavement deterioration caused by high traffic loading and increased runoff water. This study evaluates the performance of PICP with different surface patterns and found that the 45 degrees herringboned pattern had the highest volume of infiltrated water and the lowest runoff water at high rainfall intensities. It also showed higher resistance to loading compared to the 90 degrees herringboned pattern.
Article
Green & Sustainable Science & Technology
Aref A. Abadel, Mohammed Salah Nasr, Ali Shubbar, Tameem Mohammed Hashim, Rabin Tuladhar
Summary: Rendering mortar waste powder (RMWP) can be used as a sustainable alternative to cement in mortar, resulting in reduced environmental impact. The study found that by replacing 15% of the cement with RMWP, a 17% decrease in compressive strength can be achieved while maintaining or improving durability properties. The presence of RMWP also led to a denser and more homogeneous microstructure.
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)
