Article
Construction & Building Technology
Norma Gaibor, Dinis Leitao, Tiago Miranda, Nuno Cristelo, Eduardo N. B. Pereira, Vitor M. C. F. Cunha
Summary: This study aimed to optimize the mechanical behavior of alkali-activated mortar reinforced with polyacrylonitrile fibers by utilizing ceramic waste and ladle furnace slag as primary precursors, and evaluating the influence of fiber content and curing time on physical and mechanical properties. The experimental results showed that the addition of fibers significantly enhanced the compressive and tensile under flexural strengths of the mortar, regardless of the fiber ratio added.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
F. S. Lima, T. C. F. Gomes, J. C. B. Moraes
Summary: Coffee husk ash was used as an alkaline activator in the production of a one-part alkali-activated binder using blast-furnace slag. The ash showed good alkaline properties and reacted completely with the slag, resulting in a dense structure.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Gessivaldo O. Carneiro, Henrique A. Santana, Daniel Ribeiro, Marcelo S. Cilla, Cleber M. R. Dias
Summary: Due to its potential carcinogenicity and environmental impacts, finding inertization technologies for the reuse of asbestos cement waste (ACW) is a priority. Optimized heat treatment is a promising method, but there is a lack of studies on the application of treated ACW. This study investigates the potential use of heat-treated ACW as a precursor for alkali-activated binders. 11 formulations were established and evaluated, with the results showing that formulations with approximately 5% solid sodium metasilicate (SSM) and close to 1 M molar concentrations had the best mechanical properties.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Construction & Building Technology
Abdelhadi Bouchikhi, Yannick Mamindy-Pajany, Walid Maherzi, Cyrille Albert-Mercier, Hamza El-Moueden, Mahfoud Benzerzour, Arne Peys, Nor-Edine Abriak
Summary: This study investigates the valorization of Residual Waste Glass (RWG) as a source of free silicon in geopolymer activating solutions, and evaluates its effect on the mobility of metallic and metalloid trace elements. The optimal activating solution from RWG (R3) was determined for formulating geopolymers, showing enhanced properties compared to commercial sodium silicate. The study highlights the importance of dissolving RWG in sodium hydroxide before use in the geopolymer matrix to improve mechanical and environmental performance.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Zhenming Li, Irving Alfredo Flores Beltran, Yun Chen, Branko Savija, Guang Ye
Summary: By combining glass wool waste with blast furnace slag through alkali activation, a new material with good mechanical properties and workability can be obtained, without compromising the performance of the blended paste.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Saadet Gokce Gok, Ozkan Sengul
Summary: This experimental study focuses on the production of sustainable slurry infiltrated fiber concretes (SIFCONs) using alkali-activated ground granulated blast furnace slag (GGBS) and waste fibers. The results show that the mechanical properties of the alkali-activated mixtures are improved compared to the reference concretes. However, the mixtures with waste glass have lower strengths.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Adriano Galvao Souza Azevedo, Kurt Strecker
Summary: This study explores the use of Alkali Activated Materials (AAM) as potential substitutes for Portland cement in construction, by utilizing a one-part activation method with materials like kaolin, ceramic residue, and fly ash. The research finds that AAM with 30% activated ceramic residue demonstrates the highest mechanical strengths, and longer curing times lead to increased resistance in the matrices.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Felipe Silva Lima, Thiago Costa Ferreira Gomes, Joao Claudio Bassan de Moraes
Summary: In this study, a new alkaline activator, coffee husk ash, was generated by calcining coffee husk. The coffee husk ash exhibited high alkali content, low organic matter content, and good solubility/pH in water. When combined with blast-furnace slag, the coffee husk ash showed high activity and formed hydrated products in the mixture.
Article
Construction & Building Technology
Suellen Tonatto Ferrazzo, Mariana Tonini de Araujo, Giovani Jordi Bruschi, Helder Mansur Chaves, Eduardo Pavan Korf, Nilo Cesar Consoli
Summary: This study evaluated the stabilization of waste foundry sand (WFS) using an alkali-activated binder (AAB) produced from sugar cane bagasse ash, hydrated eggshell lime, and sodium hydroxide. The mechanical performance of WFS-AAB was similar or superior to WFS-Portland cement (PC), reaching 9.8 MPa after 28 days at 40 degrees C. Specimens with higher strengths exhibited higher initial stiffness, approximately 7% accumulated loss of mass (ALM), and more homogeneous and compact matrices. N-A-S-H gel was identified in WFS-AAB. WFS-AAB mixtures effectively encapsulated Cd, Cr, Mn, Pb, and Zn from wastes.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Shiyu Zhang, Fengyu Ren, Yingliang Zhao, Jingping Qiu, Zhenbang Guo
Summary: This study investigated the potential utilization of stone waste in alkali-activated slag based paste backfill. The results showed that the addition of ultra-fine portion improved the fluidity and mechanical strength of APB, active calcium accelerated the hydration reaction, and increasing slag and alkaline solution content enhanced the mechanical strength of APB samples.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Zhaoyun Zhang, Chuang Xie, Zhaohu Sang, Dejun Li
Summary: This study prepared a new composite binder by adding a large amount of soda residue (SR) and blast furnace slag (BFS) to an alkali-activated material system. The research found that an optimal level of Na2O content significantly increased the strength of the binder. The hydration process of the new binder mainly generated various crystalline hydrates that filled microcracks and significantly increased the structure density and strength. However, increasing the SR content inhibited the development of strength.
Article
Materials Science, Multidisciplinary
Gui-Yu Zhang, Run-Sheng Lin, Xiao-Yong Wang
Summary: The ceramic and oyster farming industries generate a significant amount of waste ceramics and oyster shells. Alkali-activated materials have the potential to replace Portland cement and have less impact on the environment. Adding ceramic powder and waste oyster shell powder to these materials can alleviate landfill pressure and have important implications for environmental protection.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
Shuhui Zhang, Chenghu Wang, Guiyun Gao
Summary: This paper investigates the modification on the bonding surface of new and old concrete using alkali-activated slag and fly ash as cementitious materials. Experimental specimens consisting of new and old concrete composites were prepared, and the split tensile strength test along the interface was conducted. The results indicate that the alkali-activated solid waste cementitious material with a water-to-binder ratio of 0.3 achieves the best repair performance and greater bonding strength.
Article
Construction & Building Technology
Aleksandr Klyuev, Nail Kashapov, Sergey Klyuev, Marina Ageeva, Ekaterina Fomina, Linar Sabitov, Igor Nedoseko, Nikolai Ivanovich Vatin, Pavel Kozlov, Svetlana Vavrenyuk
Summary: Alkali-activated binders based on technogenic fibrous waste were developed and the increase in specific surface area of waste particles enhanced the strength parameters. The microstructure of the binder samples with higher specific surface area showed higher density and fewer unfilled cavities. The main chemical composition of the binder was oxides of SiO2, Na2O, CaO, MgO, Al2O3.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Jixiang Wang, Tianyong Huang, Le Han, Fuzhu Xie, Ze Liu, Donming Wang
Summary: The characteristics of binder systems play vital roles in the properties of alkali-activated concretes. This study investigated 102 binder systems activated by diverse activators and established composition-properties contours/maps. The performances of AACs depend on the binder systems, and the complexity of alkali-activated binder systems makes it difficult to establish quantitative relationships between compositions and performances of AACs.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Karina H. Arcolezi, Rodrigo G. da Silva, Lourdes Soriano, Maria V. Borrachero, Jose Monzo, Jordi Paya, Mauro M. Tashima, Jorge Luis Akasaki
Summary: The granulometric distribution of aggregates significantly affects the mechanical and hydraulic properties of pervious concrete. Using single-sized aggregates increases unit weight and improves mechanical properties. This study utilized the maximum density methodology and three narrow-sized basaltic aggregates to enhance the mechanical strength of pervious concrete. Results showed that packed aggregate samples had an 81.2% increase in compressive strength and an energy support impact 50% higher than the reference sample after 28 days of curing. While densification increased, the greatest reduction in porosity was 24.3%. The lowest infiltration rate was 0.43 cm/s, which is satisfactory according to literature. These findings suggest that aggregates packing methodology is effective in producing optimized and sustainable pervious concretes.
Article
Construction & Building Technology
Angelina Bubalo, Drazen Vouk, Lidija Curkovic, Marko Rogosic, Domagoj Nakic, Christopher Cheeseman
Summary: The influence of combustion temperature on the properties of sewage sludge ash (SSA) as a substitute material for clay bricks was studied. It was found that SSA bricks produced at higher temperature have higher strength and lower water absorption, and the soluble salt content is also lower. The study also revealed that SSA from different sources has varying properties.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
P. Lorca, L. Soriano, M. V. Borrachero, J. Monzo, M. M. Tashima, J. Paya
Summary: This study investigated the effects of fly ash substitution for Portland cement and addition of hydrated lime on the properties of mortar. The results showed that the addition of hydrated lime improved the strength of the mortar and reduced the carbonation rate.
MATERIALES DE CONSTRUCCION
(2023)
Article
Engineering, Environmental
Maria Georgiades, Izhar Hussain Shah, Bernhard Steubing, Christopher Cheeseman, RupertJ. Myers
Summary: This study quantifies the potential CO2-eq. emissions reductions in cement production in Europe until 2050 by employing measures such as clinker substitution, alternative fuels, kiln improvements, and carbon capture and storage. The results show that significant reductions in CO2-eq. emissions can be achieved by 2050 through these measures, with additional reductions possible through decarbonisation scenarios for the electricity mix. Multiple pathways exist for the cement sector to achieve and surpass global climate targets.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Chemistry, Physical
Noelia Bouzon, Alba Font, Maria Victoria Borrachero, Lourdes Soriano, Jose Monzo, Mauro M. M. Tashima, Jordi Paya
Summary: This research investigates the use of rice husk ash as an alternative silica source for alkaline activators in geopolymers. Different methods were compared, and it was found that the thermal bath treatment at 65°C yielded the best mechanical strength results in mortars.
Article
Chemistry, Physical
Michelle S. Rodrigues, Jordi Paya, Lourdes Soriano, Jose Monzo, Maria Victoria Borrachero, Holmer Savastano, Antonio L. Beraldo
Summary: This study aims to evaluate the reactivity of sugarcane straw ashes (SCSA) burned under controlled conditions and analyze their application in blended cement and hydrated lime pastes. The results show that sugarcane straw ashes burned at specific temperatures can partially replace inorganic binders and have a positive impact on hydrated lime and cement pastes.
Article
Construction & Building Technology
Marta Roig-Flores, Lucia Reig, Vicente Albero, David Hernandez-Figueirido, Antonio Melchor-Eixea, Angel M. Pitarch, Ana Piquer
Summary: This study focuses on reusing ceramic tile waste in concrete to promote sustainable construction practices and circular economy by reducing natural resource consumption.
Article
Engineering, Multidisciplinary
Tingting Zhang, Jingbin Zhang, Jun Chang, Wanli Bi, Chris Cheeseman, Xiaoyang Chen
Summary: This study reported the effect of silicic acid on the hydration and strength development of magnesium oxysulfate cement containing citric acid. The presence of silicic acid promoted the hydration rate, reduced the setting time, and increased the compactness of the cement.
COMPOSITES PART B-ENGINEERING
(2024)
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)
