Article
Construction & Building Technology
Cuiqin Fang, Dong Zhang
Summary: Inorganic cementitious materials-based supercapacitors have been studied for large scale civil engineering applications, with the 2 wt% Na2SO4-Portland cement sample showing the best multifunctional properties in terms of ionic conductivity and compressive strength. The resulting Portland cement electrolytes were also assembled into structural supercapacitors with rGO foam electrodes, exhibiting a high areal capacitance of 35.18 mF cm(2).
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Sreejith Krishnan, Abhishek Singh, Shashank Bishnoi
Summary: This study investigates the influence of alkali addition on the hydration, phase assemblage, and strength development in ordinary portland cement (OPC) and limestone-calcined clay cement (LC3) produced with 50% clinker replacement. The alkalinity of OPC and LC3 was increased using four different alkali salts, resulting in an acceleration of early age hydration and strength development in both systems. However, increasing the alkalinity was also observed to reduce later age clinker hydration and strength development.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Yingbin Wang, Xinmao Li, WenJuan Miao, Bo Jiang, Ying Su, Xingyang He, Mengyang Ma, Bohumir Strnadel
Summary: The study demonstrates that both nano-MPCM and micro-MPCM can improve the compressive strength of cement based materials, with the compressive strength of specimens containing micro-MPCM being lower than those containing nano-MPCM. Additionally, the production of C-S-H gel and other hydration products increased with the incorporation of MPCM.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Chemical
Xingguo Zhang, Xiayu Zhang, Yonggang Li, Kaili Hu, Desen Mao, Liang Luo, Tong Du, Hong Zhang, Kaiqiang Liu
Summary: This study investigated the effects of metakaolin and graphite on the properties of cement paste at high temperatures. The results showed that high temperatures changed the structure of C-S-H in the cement paste, causing damage to the microstructure and reduced mechanical properties. Metakaolin and graphite improved the mechanical properties by filling effect and accommodating uneven variation of hydration products, respectively.
Article
Chemistry, Multidisciplinary
Bao Lu, Pingping He, Jianhui Liu, Ziyi Peng, Baixing Song, Xiang Hu
Summary: This study demonstrates that a high concentration of CO2 increases the content of calcite in CO2-cured cement pastes, which accelerates the hydration of cement clinker. In addition, CO2-cured cement pastes exhibit higher compressive strength and lower porosity.
JOURNAL OF CO2 UTILIZATION
(2021)
Review
Construction & Building Technology
Balamurali Kanagaraj, Eva Lubloy, N. Anand, Viktor Hlavicka, Tattukolla Kiran
Summary: Geo-polymer concrete (GPC) is produced through chemical reactions between industrial products and naturally occurring alumino silicate sources. However, there is a lack of standardized guidelines for mix production, limiting the acceptance of geo-polymer in the industry. Unlike cement concrete, GPC's properties are influenced by various factors such as the ratio of alkaline liquid to cementitious material, alkaline activator ratio, binder type, and curing type. This paper provides an overview of the chemistry behind GPC, alumino-silicate sources, and the microstructural analysis of binders under different curing conditions.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Saloni, Parveen, Yee Yan Lim, Thong M. Pham
Summary: The study indicates that replacing 15% of Ordinary Portland Cement with rice husk ash in fine rice husk ash-based geopolymer concrete leads to optimal concrete properties, including compressive strength, flexural strength, modulus of elasticity, water absorption, and chloride penetration resistance.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Yan Xia, Minghao Liu, Yading Zhao, Xiaobing Ma
Summary: This study investigates the effect of Na2SO4 on the hydration and microstructure of Portland cement blended with a high dosage of sewage sludge ash (SSA). The addition of Na2SO4 significantly improves the compressive strength of the blended systems and enhances the microstructure. Na2SO4 also promotes the formation and growth of AFt crystals in the blended systems.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Construction & Building Technology
Bo Fu, Zhenyun Cheng, Dezhi Wang, Ning Li
Summary: This paper investigates the effect of coal gasification slag (CGS) powder on the reaction kinetics and compressive strength of Portland cement. It is found that a low dosage of CGS powder can promote the hydration reactions of Portland cement, shorten the setting time, and improve the compressive strength.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Aref A. Abadel, Hussam Alghamdi, Yousef R. Alharbi, Mohammed Alamri, Mohammad Khawaji, Mohammed A. M. Abdulaziz, Moncef L. Nehdi
Summary: This study investigated the production process of eco-efficient alkali-activated slag-based samples using recycled construction cementitious materials (RCCM) and red mud (RM). The findings showed that when a high quantity of dehydrated cement powder (DCP) and red mud were used, the strength and durability of the specimens improved significantly. It was concluded that DCP and RM could be potential sustainable binder substitutes, allowing waste valorization and reducing negative environmental impact.
Article
Construction & Building Technology
Lucas Henrique Pereira Silva, Jacqueline Roberta Tamashiro, Fabio Friol Guedes de Paiva, Luis Fernando dos Santos, Silvio Rainho Teixeira, Angela Kinoshita, Patricia Alexandra Antunes
Summary: The study found that using bamboo leaf ash as a partial replacement for cement in mortar production can achieve certain economic benefits and mitigate environmental impacts, with the compressive strength meeting standard requirements. Bamboo leaf ash has the potential to be used as a partial substitute for cement, offering good cost-benefit and eco-efficiency based on life cycle analysis (LCA).
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Mai Zhang, Franco Zunino, Lu Yang, Fazhou Wang, Karen Scrivener
Summary: Alkalis have been found to increase the early strength of cementitious materials but have a negative impact on long-term strengths. This paper investigates the influence of alkali addition on white cement properties and proposes a plausible mechanism for the reduction in late strength for the first time. The study shows that alkali addition generally limits the degree of hydration after 1 day, leading to a decrease in internal relative humidity and desaturation of larger pores.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Chemistry, Physical
M. Ramadan, Wageeh Ramadan, Fatma Shwita, Nabil El-Faramawy
Summary: The main goal of this study is to fabricate low-cost green binding material produced from the safe recycling of soda-lime glass waste, hazardous lead-rich glass waste and slag. The compressive strength of geopolymer pastes is lower than that of OPC pastes, but they have acceptable attenuation capacity for gamma rays. In addition, the production of these geopolymers can significantly reduce energy consumption and CO2 emissions, showing good economic and environmental benefits.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Construction & Building Technology
Levent Koroglu, Derya Over Kaman, Erhan Ayas
Summary: The study found that heat-treated boron derivative wastes used as replacements for Portland cement significantly affected the strength of mortars due to their particle size distribution. Smaller particle sizes decreased the strength of mortars, while larger particle sizes reduced the strength significantly.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Multidisciplinary Sciences
Jinping Jiang, Maosen Li, Jiahao Yan, Mengya Zhou, Ping Duan, Zuhua Zhang, Junhan Liu
Summary: This paper evaluates the effects of calcined attapulgite (CAG) on the early hydration, microstructure, and mechanical properties of cementitious materials. The influence mechanism is explained through XRD, TG-DTG, SEM-EDS, and hydration kinetics analysis. The results show that CAG accelerates the hydration rate and promotes the early hydration process by introducing additional active sites. It also consumes Portlandite (CH) and promotes the formation of hydrotalcite, leading to a more compact structure and improved strength development.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Environmental
Daniel Lopez-Pedrajas, Ana M. Borreguero, F. Javier Ramos, Juan Francisco Rodriguez, Macarena Jimenez-Vazquez, Manuel Carmona
Summary: Phase Change Dispersions (PCDs) with large colloidal stability were produced using gum arabic (GA) and sodium dodecyl sulfate (SDS) mixtures as dispersant agent. The interplay between PCD base properties and final phase change slurry (PCS) characteristics was observed. Homogeneous PCSs were obtained from GA/SDS mass ratios of 70/30 and 40/60, while two phase products were generated from mass ratios 20/80 or 0/100. The PCS prepared with a GA/SDS mass ratio of 40/60 satisfied the European classification as nanomaterial.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Francisco Javier Redondo-Calvo, Natalia Bejarano-Ramirez, Victor Baladron, Omar Montenegro, Luis Antonio Gomez, Ruben Velasco, Natalia Villasanti, Soledad Illescas, Maria Teresa Franco-Sereno, Ignacio Gracia, Juan Francisco Rodriguez, Jose Ramon Munoz-Rodriguez, Jose Manuel Perez-Ortiz
Summary: This study aimed to evaluate the use of thiosulfinate-enriched Allium sativum and black garlic extracts as adjuvants in the management of sepsis. The results showed that these extracts had positive effects on alleviating clinical symptoms, improving liver damage, and reducing inflammatory response.
Article
Construction & Building Technology
Mark Bediako, Luca Valentini
Summary: This study demonstrates that using pozzolan as a binder in concrete production can significantly reduce carbon dioxide emissions while still meeting the strength requirements of C30 grade concrete. By utilizing pozzolan, global sustainability can be enhanced by reducing greenhouse gas emissions.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Engineering, Mechanical
Ana-Eva Jimenez, Maria-Dolores Aviles, Ramon Pamies, Maria-Dolores Bermudez, Francisco-Jose Carrion-Vilches, Jose Sanes
Summary: Three diprotic ionic liquids (PILs) were studied as lubricants for Ti6Al4V-sapphire contact. The neat PILs showed significant friction reduction compared to water at room temperature. New aqueous lubricants containing 1 wt.% PILs exhibited higher friction reductions at room temperature. The PILs containing aliphatic anions showed the best tribological performance at 100 degrees C.
Article
Engineering, Environmental
Yikai Liu, Simone Molinari, Maria Chiara Dalconi, Luca Valentini, Maurizio Pietro Bellotto, Giorgio Ferrari, Roberto Pellay, Graziano Rilievo, Fabio Vianello, Gabriella Salviulo, Qiusong Chen, Gilberto Artioli
Summary: A geochemical model combined with parametric fitting techniques was used to investigate the solidification/stabilization mechanisms of Pb-rich pyrite ash in ordinary Portland cement and calcium aluminate cement. The study revealed that ettringite and calcium silicate hydrates have strong affinities for Pb under alkaline conditions. When the hydration products are unable to stabilize all the soluble Pb, part of it may be immobilized as Pb(OH)2. Hematite from pyrite ash and newly-formed ferrihydrite, along with anglesite and cerussite precipitation, are the main controlling factors of Pb under acidic and neutral conditions. This work provides valuable insights for the development of more sustainable mixture formulations in solid waste remediation.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Chemical
Yikai Liu, Peishen Wang, Maria Chiara Dalconi, Simone Molinari, Luca Valentini, Yunmin Wang, Shiyuan Sun, Qiusong Chen, Gilberto Artioli
Summary: The use of cement for solid waste solidification/stabilization is widely used but has come under scrutiny due to its greenhouse gas emissions. However, cement-immobilized solid waste may serve as a CO2 sink and reabsorb atmospheric CO2, which has not been explored before. This study investigates the potential CO2 absorption effect of phosphogypsum (PG) based cemented paste backfill (PCPB), finding that with a high PG utilization rate, PCPB application in China may produce 16.7 Mt/year of CO2, but a reduction of 5.76 Mt/year could be achieved considering future reabsorption. Impurities in PG and maintaining alkalinity limit industrial applications. Phosphate impurities hinder CO2 uptake, while fluorides accelerate hydration reactions and carbonation. Geochemical modeling suggests that maintaining a basic pH condition can enhance CO2 capture capacity. PCPB is considered an effective way to immobilize PG with scalable potential, providing guidance for the management of dumped PG and phosphorus fertilizer industry emissions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Maria del Prado Garrido, Ana Maria Borreguero, Maria Jesus Ramos, Manuel Carmona, Francisco Javier Redondo Calvo, Juan Francisco Rodriguez
Summary: This study developed styrene-divinylbenzene (St-DVB) particles with polyethylene glycol methacrylate (PEGMA) and/or glycidyl methacrylate (GMA) brushes for the removal of bilirubin in haemodialysis. Immobilizing bovine serum albumin (BSA) onto the particles increased their capacity for bilirubin removal and enabled quick and selective removal from plasma. The St-DVB-GMA-PEGMA particles wetted in ethyl lactate with BSA reduced the concentration of bilirubin in plasma by 53% in less than 30 minutes.
Article
Polymer Science
Juan Catala, Irene Guerra, Jesus Manuel Garcia-Vargas, Maria Jesus Ramos, Maria Teresa Garcia, Juan Francisco Rodriguez
Summary: This article introduces non-isocyanate polyurethanes (NIPUs) based on biobased polyamines and polycarbonates as a sustainable alternative to conventional polyurethanes. A novel method is disclosed to control the crosslinking density of fully biobased isocyanate-free polyurethanes, and the synthesis procedure and influence of partial blocking of active polymerization sites are explored. Fully biobased NIPUs with targeted crosslinking density are successfully synthesized using hybrid NIPUs.
Article
Green & Sustainable Science & Technology
Raine Isaksson, Max Rosvall, Arezou Babaahmadi, Apollo Buregyeya, Amrita Hazarika, Joseph Mwiti Marangu, Kolawole Olonade, Swaminathan Ramanathan, Anthony Rucukye, Luca Valentini
Summary: Sustainable building in Sub-Saharan Africa faces challenges of affordability and high carbon footprint. The use of Supplementary Cementitious Materials (SCMs) in block production has potential to reduce carbon emissions and cost. However, there is limited information on SCMs and their quantities available. Theoretical analysis suggests that using SCMs like cassava peel ash, rice husk ash, corn cob ash, volcanic ash, and calcined clays could lead to significant economic and environmental benefits, including savings of USD 400 million, 1.7 million tonnes of CO2, and creation of 50,000 jobs. However, additional solutions are required to ensure sustainable block production.
Article
Chemistry, Multidisciplinary
Maria del Prado Garrido, Juan Francisco Rodriguez, Maria Jesus Ramos, Manuel Carmona, Francisco Javier Redondo Calvo, Ana Maria Borreguero
Summary: The scale-up and economic feasibility of synthesizing St-MMA-GMA-PEGMA particles biofunctionalized with HSA were studied. The geometrical similarity between laboratory and pilot plant reactors was examined to develop a scaling-up process based on the criterion of constant Re number. A reaction was carried out in the pilot plant scale, confirming the suitability of the scale-up criterion as particles with similar characteristics and functional groups were obtained. The economic feasibility of an industrial plant producing HSA functionalized particles was addressed, showing a high internal rate of return (IRR) and net present value (NPV), as well as a short payback time.
APPLIED SCIENCES-BASEL
(2023)
Article
Construction & Building Technology
Ludovico Mascarin, Luca Valentini, Gilberto Artioli, Maria Chiara Dalconi, Jean Colombani
Summary: This study aims to accurately describe the dissolution rate of tricalcium silicate (C3S) by implementing a new approach based on holographic interferometry. The protocol involves measuring the pure dissolution rate constant of C3S in supersaturated conditions with respect to C-S-H. By monitoring the release of calcium from a polycrystalline C3S surface in a quiescent solution, the researchers were able to assess the rate law of C3S dissolution.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Polymer Science
Yuhan Li, Kaizheng Zhu, Huaitian Bu, Zhenyu Fu, Anna-Lena Kjoniksen, Bo Nystrom, Shujiang Ding
Summary: A series of AB(6) type-7 miktoarm star copolymers consisting of PEG and PCL were synthesized and introduced into solid electrolyte systems to enhance the properties of composite solid polymer electrolytes. The interaction between the star copolymers and lithium ions improves the segment mobility of the polymer and lithium-ion transfer.
Article
Materials Science, Composites
Fuensanta Monzo, Alejandro Arribas, Francisco Jose Carrion-Vilches, Ramon Pamies
Summary: In this study, plastic films composed of modified layered double hydroxides (LDHs) were prepared and incorporated into a low-density polyethylene (LDPE) matrix. The addition of a sunscreen additive, sulfonic phenylbenzimidazole acid sodium salt, improved the thermal and optical properties through ion-exchange reactions. The modified LDHs were characterized and evaluated, and the influence of a non-ionic surfactant was also investigated.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Engineering, Environmental
Yikai Liu, Simone Molinari, Maria Chiara Dalconi, Luca Valentini, Giulia Ricci, Claudio Carrer, Giorgio Ferrari, Gilberto Artioli
Summary: In this study, the role of soil mineralogy in the release of potentially toxic elements (PTEs) was investigated, and a modeling approach was used to predict the leaching behavior. The results showed that the lowest leached concentrations of lead (Pb) and zinc (Zn) occurred at pH values ranging from 8.0 to 10.0. Anglesite, cerussite, and hydrocerussite were found to control Pb retention, while zinc carbonates and hydroxides were responsible for Zn retention. The release of sulfate increased with pH values, governed by the equilibrium of jarosite, gypsum, and anglesite. The combination of experimental and modeling approaches provided valuable insights into PTEs' release and retention.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Proceedings Paper
Construction & Building Technology
Gregor J. G. Gluth, Xinyuan Ke, Anya Vollpracht, Susan A. Bernal, Ozlem Cizer, Martin Cyr, Katja Dombrowski-Daube, Dan Geddes, Cyrill Grengg, Cassandre Le Galliard, Marija Nedeljkovic, John L. Provis, Zhenguo Shi, Luca Valentini, Brant Walkley
Summary: The carbonation of alkali-activated concretes is influenced by their binder chemistries. A compiled database of carbonation data for alkali-activated concretes and mortars, as well as blended Portland cement-based concretes, suggests that the w/CaO ratio and w/b ratio are not good indicators of carbonation resistance for alkali-activated concretes. Instead, the w/(CaO + Na2O + K2O) ratio appears to be a better indicator, and testing at elevated CO2 concentrations may lead to inaccurate predictions of carbonation coefficient.
PROCEEDINGS OF THE 75TH RILEM ANNUAL WEEK 2021
(2023)
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)