Review
Construction & Building Technology
Furqan Farooq, Jin Xin, Muhammad Faisal Javed, Arslan Akbar, Muhammad Izhar Shah, Fahid Aslam, Rayed Alyousef
Summary: The rise in population and improvement in lifestyle have led to a rapid increase in energy demand for buildings, prompting the development of sustainable infrastructure due to the lack of fossil fuels and environmental issues. Geopolymer composites are becoming popular for their sustainability and reduced greenhouse gas emissions compared to ordinary Portland cement.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Chenchen Luan, Xiaoshuang Shi, Kuanyu Zhang, Nodir Utashev, Fuhua Yang, Jinxin Dai, Qingyuan Wang
Summary: This study proposed a new mix design method for geopolymer concrete, specifically low calcium fly ash geopolymer concrete, which allows for achieving high strength and excellent workability simultaneously. The workability is mainly influenced by the water content, while strength is affected by the water to alkaline activator ratio.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Abdulrahman Albidah, Mohammed Alghannam, Husain Abbas, Tarek Almusallam, Yousef Al-Salloum
Summary: This study investigates the effects of mix design parameters on properties of geopolymer concrete produced using local metakaolin, presenting useful models for predicting performance and confirming results through XRD, SEM, and EDS analysis on selected mixes.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Multidisciplinary Sciences
Mohammed Alghannam, Abdulrahman Albidah, Husain Abbas, Yousef Al-Salloum
Summary: This study investigated the properties of metakaolin-based geopolymer concrete through 16 mixes, aiming to optimize the mix proportions and understand the influences of various parameters on its behavior. Insights were provided into the curing conditions, molarity, and ratios of materials, and a model for water to solids ratio based on total aggregate percentage was proposed for workable geopolymer mixes.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Construction & Building Technology
Ahmed M. Tahwia, Ashraf M. Heniegal, Mohamed Abdellatief, Bassam A. Tayeh, Mohamed Abd Elrahman
Summary: This paper investigates the effects of waste glass on ultra-high performance geopolymer concrete (UHPGC). The study finds that the addition of waste glass improves the flowability but reduces the compressive strength of the concrete. Waste glass also contributes to the durability and thermal stability of the concrete after high temperature exposure.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
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
Fatih Kantarci, Ibrahim Turkmen, Enes Ekinci
Summary: This study aimed to enhance the performance of volcanic tuff-based geopolymer concrete under elevated temperatures by using nano-silica, micro-silica, and styrene-butadiene latex additives. The experimental results showed that the addition of micro-silica significantly improved the high-temperature performance of the concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Ming Sun, Yin Fu, Weixin Wang, Youzhi Yang, An Wang
Summary: This paper experimentally studied the effects of different molybdenum tailings (MoT) content and different curing conditions on the compressive strength of fly ash-based geopolymers. The results show that MoT content and curing conditions have synergistic effects on the compressive strength. Under standard curing, the increase in MoT content is detrimental to the development of compressive strength, and under water curing conditions, the compressive strength first increases and then decreases with the increase in MoT.
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
Construction & Building Technology
Ali Ihsan Celik, Yasin Onuralp Ozkilic, Alireza Bahrami, Ibrahim Y. Hakeem
Summary: This study shows that combining 5% micro silica with 1% lathe scraps provides the highest strength in concrete. Adding 5% micro silica significantly improves compressive, flexural, and splitting tensile strengths, while higher additions of 10% and 20% decrease these strengths. Moreover, incorporating 1% lathe scraps leads to considerable increases in strength, but higher additions of 2% and 3% reduce the capacity.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Polymer Science
Changming Li, Xiaoxiong Chai, Hui Liu, Haifeng Cheng, Dongyang Jia, Longfei Di, Songlin Qin, Yongbao Jin
Summary: In this paper, the reuse of silted sediment to produce geopolymer composite materials was studied. The effects of different modifiers and admixtures, as well as curing conditions and age, on the mechanical properties and microstructure of the materials were investigated. The results showed that the addition of mineral admixtures significantly increased the compressive strength of the modified materials, while the type and dosage of modifiers had a smaller impact on the strength.
Article
Construction & Building Technology
Phaithun Nasaeng, Ampol Wongsa, Raungrut Cheerarot, Vanchai Sata, Prinya Chindaprasirt
Summary: This research investigated the influence of recycled materials powder on the properties of pumice-based geopolymer paste. The results showed that the compressive strength of the geopolymer paste increased with the inclusion of ground recycled concrete and calcined oyster shell, leading to the formation of calcium silicate hydrate (C-S-H) crystalline phases and improved density and homogeneity.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Najib N. Gerges, Camille A. Issa, Elias Sleiman, Sara Aintrazi, Jad Saadeddine, Remi Abboud, Marc Antoun
Summary: This research explores a solution to reduce the carbon footprint and repurpose waste materials in concrete production. By replacing concrete components with waste and by-products, a significant reduction in the need for raw materials with high carbon footprint is achieved, while also implementing waste recycling as part of a circular economy.
Article
Construction & Building Technology
Yongqian Zheng, Yanjun Xiao
Summary: This study investigates the mechanical properties and microstructure characteristics of geopolymer recycled brick aggregate concrete (GRBC), a new sustainable material. The results show that as the replacement ratio of recycled brick aggregate increases, the compressive strength, tensile strength, and bond strength between concrete and steel bar decrease. GRBC exhibits a faster rate of decrease compared to ordinary recycled brick aggregate concrete (ORBC).
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Multidisciplinary Sciences
M. Talha Ghafoor, Chikako Fujiyama
Summary: This experimental study proposes a mix design methodology for self-compacting geopolymer concrete (SCGC) considering various influencing parameters recommended for self-compacting concrete (SCC) and geopolymer concrete (GPC). The test results show that SCGC has similar flow deformability with slower flow speed compared to SCC. The optimum compressive strength of 37 MPa is achieved for SCGC with silica sand as fine aggregate, NaOH concentration of 16 M, fly ash to sand ratio (FA/S) of 0.75, and cured for 48 H at 80 degrees C.
Article
Construction & Building Technology
Giorgio Ferrari, Alberto Brocchi, Fabio Castiglioni, Anna Bravo, Emanuele Moretti, Davide Salvioni, Marco Squinzi, Gilberto Artioli, Maria Chiara Dalconi, Luca Valentini, Gregorio Dal Sasso
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Environmental Sciences
Yikai Liu, Qiusong Chen, Maria Chiara Dalconi, Simone Molinari, Luca Valentini, Yunmin Wang, Shiyuan Sun, Peishen Wang, Gilberto Artioli
Summary: The use of cemented paste backfill (OCPB) for the solidification/stabilization of phosphogypsum provides a low-cost and alternative technique for recycling phosphogypsum stockpiles. This study investigates the retention mechanisms of fluoride and phosphate in immobilized OCPB using a framework combining chemical, mineralogical, and morphological analyses. The findings suggest that aluminate-rich calcium silicate hydrates play a crucial role in fluoride and phosphate retention, and the cementitious matrix acts as a buffering material to maintain high pH conditions necessary for retention.
ENVIRONMENTAL RESEARCH
(2022)
Article
Construction & Building Technology
Gregor J. G. Gluth, Xinyuan Ke, Anya Vollpracht, Lia Weiler, Susan A. Bernal, Martin Cyr, Katja Dombrowski-Daube, Daniel A. Geddes, Cyrill Grengg, Cassandre Le Galliard, Marija Nedeljkovic, John L. Provis, Luca Valentini, Brant Walkley
Summary: The understanding and prediction of the carbonation process and rate of alkali-activated concretes is complicated by the various binder chemistries and testing conditions used. An analysis of carbonation data from literature suggests that the water/(CaO + MgOeq + Na2Oeq + K2Oeq) ratio is a better indicator of carbonation resistance for alkali-activated concretes.
MATERIALS AND STRUCTURES
(2022)
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
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)