Materials and Structures最新文献

{"title":"Enhancing fatigue resistance and low-temperature performance of asphalt pavements using antioxidant additives","authors":"Yongping Hu,&nbsp;Xu Cheng,&nbsp;Anand Sreeram,&nbsp;Wei Si,&nbsp;Bo Li,&nbsp;Georgios Pipintakos,&nbsp;Gordon D. Airey","doi":"10.1617/s11527-025-02574-4","DOIUrl":"10.1617/s11527-025-02574-4","url":null,"abstract":"<div><p>Ageing results in significant performance deterioration of asphalt, especially in relation to its fatigue and low-temperature performance. This performance deterioration can theoretically be lowered by incorporating antioxidants in asphalt mixtures. Although there are several promising studies that have shown the potential efficacy of antioxidants such as zinc diethyldithiocarbamate (ZDC), no work has comprehensively evaluated its performance. In this regard, ZDC was employed to evaluate its effect as an antioxidant to slow down the ageing related performance deterioration of bitumen and asphalt mixtures. Both ZDC-modified (3% and 5%) and unmodified bitumen and asphalt mixtures were subjected to short-term and long-term ageing. Afterwards, linear amplitude sweep (LAS) tests and low-temperature frequency sweep tests were carried out on the bitumen samples using a dynamic shear rheometer (DSR). Four-point bending (4PB) fatigue tests were carried out at 25 °C, and indirect tensile asphalt cracking tests (IDEAL-CT) were carried out at 25 °C and −10 °C on the various asphalt mixtures. It was seen that properties of long-term aged bitumen and asphalt mixtures measured at low temperature and intermediate temperature could be improved by 13–69% for mixtures and 1–44% for bitumen with the addition of ZDC, compared to the unmodified samples. The ageing-mitigation efficiency of ZDC was more pronounced for the low-temperature performance-based metrics since its performance deterioration rate was significantly reduced. Overall, a comprehensive performance evaluation of the effectiveness of antioxidants at different scales provided robust evidence for the potential extension of this technology to field trials and application.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-025-02574-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recommendation of RILEM TC 269-IAM: damage assessment in consideration of repair/retrofit-recovery in concrete and masonry structures by means of innovative NDT","authors":"Tomoki Shiotani,&nbsp;Kazuo Watabe,&nbsp;RILEM Technical Committee","doi":"10.1617/s11527-024-02525-5","DOIUrl":"10.1617/s11527-024-02525-5","url":null,"abstract":"<div><p>This recommendation specifies a method for measuring active elastic waves and assessing damage to concrete members such as decks and girders. The method uses elastic waves propagating inside the concrete member. Elastic waves generated near a surface of the concrete member are detected by acoustic emission sensors installed on the opposite side of the member. Elastic waves propagating in concrete are attenuated or diffracted by damage such as cracks and voids, resulting in fewer AE sources than that of intact areas. Thus, it is possible to distinguish a damaged region from others with density of the observed AE source distribution.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-024-02525-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficacy of octadecylamine-functionalized graphene versus graphene nanoplatelets and graphene oxide as asphalt binder modifiers for high-temperature performance","authors":"Hashem Khaled Almashaqbeh,&nbsp;Mohammed Majdoub,&nbsp;Dineshkumar Sengottuvelu,&nbsp;Sasan Nouranian,&nbsp;Jesse D. Doyle,&nbsp;Omar Algharibeh,&nbsp;Hunain Alkhateb,&nbsp;Grace Rushing,&nbsp;Nawal Al-Shraideh,&nbsp;Mine G. Ucak-Astarlioglu,&nbsp;Ahmed Al-Ostaz","doi":"10.1617/s11527-024-02518-4","DOIUrl":"10.1617/s11527-024-02518-4","url":null,"abstract":"<div><p>In this work, we comprehensively report on the synthesis of octadecylamine (ODA)-functionalized graphene (G-ODA) and compare its performance to those of graphene nanoplatelets (GNPs) and graphene oxide (GO) as asphalt binder modifiers. An exploration into the mechanisms through which asphalt binder properties are enhanced by each graphene-based material has been conducted, identifying the one that demonstrates superior compatibility with asphalt. The study systematically evaluates the performance of each modifier, analyzing viscosity, rheology, anti-aging properties, morphology, and chemical transformations within asphalt binders. Experimental results indicate that all three graphene-based modifiers enhance the high-temperature performance and aging resistance of the asphalt binder, with GO emerging as the most compatible material, exhibiting superior performance across all investigated responses. The rheological properties results show that GO can improve G*/sin(δ) for the unaged binder by about 120%, followed by G-ODA and GNP. On the contrary, multiple stress creep and recovery (MSCR) results indicate that both GO and GNP efficiently reduce permanent deformation, with reductions in Jnr of about 39% and 34%, respectively while the G-ODA shows a smaller reduction of − 10%. Additionally, GO excels in improving elastic response, showing a substantial increase in percent recovery at 297%, compared to 48.4% with GNP and 28.8% with G-ODA. Fourier-transform infrared spectroscopy (FTIR) analysis establishes the absence of evidence indicating chemical interaction between any of the graphene-based materials and asphalt molecules. This suggests that the improvement is solely attributed to physical interaction, specifically through <i>π</i>-<i>π</i> interaction. On the other hand, AFM phase images indicate that all graphene-based materials can alter the morphology of asphalt binders. They increase the projected surface area of the Peri/Catana phases, which can influence the rheological properties of the binder.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-024-02518-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical analysis of mechanical properties at the internal interface of SFP material using a digital image algorithm","authors":"Xiaoyu Liu,&nbsp;Kuanghuai Wu,&nbsp;Giovanni Giacomello,&nbsp;Xu Cai,&nbsp;Marco Pasetto","doi":"10.1617/s11527-025-02575-3","DOIUrl":"10.1617/s11527-025-02575-3","url":null,"abstract":"<div><p>Semi-flexible pavements (SFP) are extensively used in high-traffic zones owing to their outstanding resistance against rutting. Nonetheless, interface cracking persists as a prominent issue within SFP composites. This study establishes a finite element model of SFP using a computer vision algorithm to analyze its mechanical properties at the internal interface. Two interface components, namely the aggregate-asphalt and asphalt-grout interfaces, were developed to simulate stress distribution, crack initiation, and extension within the multiphase composite of SFP. The examination of transition zone properties within the asphalt-grout interface shed light on damage morphology and mechanical response. The results demonstrate that incorporating the interface layer significantly enhances the accuracy of force behavior analysis in simulating SFP materials. Furthermore, reinforcing the interface transition zone boosts the overall peak compressive strain strength of SFP materials in tandem with increased interface strength. Moreover, the grout joints and asphalt-grout interfaces within SFP act as vulnerable points where cracks propagate swiftly, leading to the detachment of cementitious grout from the base asphalt mixture.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of highly conductive and self-sensing cement concrete using PVA/nano CB-impregnated recycled coarse aggregate","authors":"Jinxia Xu,&nbsp;Manlin Hou,&nbsp;Yiyang Jiang,&nbsp;Zihui Jiang,&nbsp;Da Li,&nbsp;Feiyue Liu,&nbsp;Yuexuan Liu,&nbsp;Wenku Dong","doi":"10.1617/s11527-025-02577-1","DOIUrl":"10.1617/s11527-025-02577-1","url":null,"abstract":"<div><p>This paper aims to develop a novel method of preparing self-sensing concrete with recycled coarse aggregate (RCA) impregnated by polyvinyl alcohol (PVA) solution containing nano carbon black (Nano CB). The four-electrode method was adopted to investigate the influence of modified RCA substitution ratio, temperature and water content on the electrical resistivity of as-fabricated modified RCA concrete. In addition, the effects of modified RCA substitution ratio and loading rate on the piezoresistivity were explored. The results indicate that the modification have successfully attached Nano CB to the surface of RCA, and the micro-pores on the RCA surface have been filled with PVA/ Nano CB slurry, meanwhile, the water absorption decreased by 28.8%, and the crushing value decreased by 42.3%. The workability and compressive strength of concrete are improved by the modification of RCA as well. As the RCA substitution ratio increases, the resistivity of concrete first decreases slowly, then sharply and finally stabilizes. The percolation threshold of modified RCA concrete is approximately 60% substitution ratio of modified RCA (1.76 wt.% Nano CB by weight of cement). Moreover, the conductivity of modified RCA concrete possesses positive temperature sensitivity and humidity adaptability. Under cyclic loading of stress, the order of the maximum FCR value and the stress sensitivity of modified RCA concrete is: percolation zone &gt; conductive zone &gt; insulation zone. The specimens with modified RCA substitution ratio of 60% (in percolation zone) exhibit the best piezoresistive response compared to specimens with substitution ratios of 40% (in insulation zone) and 80% (in conductive zone). In addition, regardless of the modified RCA substitution ratio, the stress sensitivity of specimens decreases with the increase of loading rate.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hygrothermal performance of wood-cement walls across various climate conditions","authors":"Amer Bakkour,&nbsp;Salah-Eddine Ouldboukhitine,&nbsp;Pascal Biwole,&nbsp;Sofiane Amziane","doi":"10.1617/s11527-024-02560-2","DOIUrl":"10.1617/s11527-024-02560-2","url":null,"abstract":"<div><p>In response to the challenges of natural resource depletion and the need to reduce energy consumption in buildings, the demand for sustainable materials and energy-efficient construction practices has become critical. This study aims to evaluate the hygrothermal performance of walls constructed from wood aggregates-cement concrete and to compare their effectiveness with that of conventional walls under different climates. The numerical model for heat and moisture transfer through wood concrete walls, implemented using MATLAB software, is validated through a long-term in-situ measurement on a wood-cement concrete building over a 12-month period. Monitoring of temperature and relative humidity takes place both inside and outside the building, as well as at three specific positions within the walls. Thermo-physical parameters of wood concrete necessary to feed the model are initially determined through in-lab experimental characterization. Comparisons between the measured and numerical results demonstrate the ability of the adopted ‘reduced heat, air, and mass’ model to accurately replicate the hygrothermal behavior of wood-concrete walls under real climatic conditions. After successfully validating the model, the hygrothermal performance of the wood-cement wall under different climate conditions is evaluated. The assessment incorporates key parameters such as the decrement factor, time lag, and interstitial condensation. Focusing on the center position of the wall, the study demonstrates that the bio-based wall achieves up to 6% more temperature reduction than the conventional wall and maintains more stable RH levels, fluctuating around 70%. Furthermore, no condensation is observed in any of the climates studied, highlighting the material’s suitability for sustainable building designs.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrated computational assessment of concrete properties, durability, and environmental impacts","authors":"Meng Gao,&nbsp;Niko Heeren,&nbsp;Hong S. Wong,&nbsp;Rupert J. Myers","doi":"10.1617/s11527-024-02562-0","DOIUrl":"10.1617/s11527-024-02562-0","url":null,"abstract":"<div><p>Due to the vast landscape of low carbon concretes that have been or can be developed, traditional empirical methods are impractical for comprehensive assessment of concrete performance. Here, we describe Panoramix 1.0, a Python-based tool that can predict physical and chemical properties of hydrated cements, and durability and environmental impacts of concretes. Applying it to CEM I concrete as a case study, we investigate the cement composition effects on the freeze–thaw resistance indicator (time to critical saturation degree, <i>t</i>_<i>CR</i>). Results indicate that chemical composition of raw materials including Fe₂O₃ may influence freeze–thaw resistance, which is usually not considered in the current scheme of durability assessment. The results also show how the design space (i.e., feasible cement compositions) could be found for different types of concrete at specified minimum freeze–thaw resistance. We validate Panoramix by comparing its ranking of 28 concrete samples in terms of freeze–thaw performance (<i>t</i>_<i>CR</i>) with experimental data for relative dynamic modulus of elasticity (RDME) reported in ten publications and measured using procedures from four different standards. By combining the composition-freeze–thaw resistance modelling with a life cycle assessment model, we show that the climate change impact (100-year global warming potential) per m³ CEM I concrete can be reduced from 313 to 286 kg CO₂-eq. by decreasing the clinker-to-cement ratio while reducing <i>t</i>_<i>CR</i> from 7 to 5.5 years.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-024-02562-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transformation and regression statistics of the size-effect method for determining fracture energy and process zone size in quasi-brittle materials","authors":"Madura Pathirage,&nbsp;Gilles Pijaudier-Cabot,&nbsp;David Grégoire,&nbsp;Gianluca Cusatis","doi":"10.1617/s11527-024-02565-x","DOIUrl":"10.1617/s11527-024-02565-x","url":null,"abstract":"<div><p>This paper investigates the regression statistics of the size-effect method to obtain fracture parameters of quasi-brittle materials. The correct nonlinear regression model and assumptions are established and verified using a large dataset of size-effect tests extracted from the literature. The effect of model transformation on the change in error structure is then investigated. Three different transformations are considered, including the one leading to the linear regression recommended by RILEM (Mater Struct 23:461–465, 1990). The behavior of the nonlinear least squares estimators of the fracture parameters corresponding to the untransformed space, i.e., peak load <i>P</i> versus specimen size <i>D</i>, and to each of the three transformations are discussed. Monte Carlo simulations on generated data show that the transformations lead to the violation of model assumptions and to highly skewed error distributions prone to artificial outliers. The paper also shows that the estimator corresponding to the RILEM recommendation is asymptotically biased. The estimators corresponding to the other transformations are found either asymptotically biased or do not possess the minimum variance property. Finally, simulations show that the least squares point estimates of the unknown fracture parameters differ when a model transformation is used, and that the difference is statically significant. The fitting of the fracture parameters through the size-effect method should only be obtained in the space (<i>P</i> vs. <i>D</i>) for which the nonlinear least squares estimator is asymptotically unbiased, mean square consistent, and has minimum variance. The linear regression plot suggested by RILEM should be avoided for the statistical inverse problem of the size-effect method.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reviewing numerical studies on sensible thermal energy storage in cementitious composites: report of the RILEM TC 299-TES","authors":"Mohammad Rahjoo,&nbsp;Antonio Caggiano,&nbsp;Umberto Berardi,&nbsp;Achutha Prabhu,&nbsp;Jorge S. Dolado","doi":"10.1617/s11527-024-02548-y","DOIUrl":"10.1617/s11527-024-02548-y","url":null,"abstract":"<div><p>Concrete has emerged as a promising solid-based sensible heat storage (SHS) material due to its favorable balance of thermal properties, cost-effectiveness, non-toxicity, and widespread availability. This state-of-the-art review examines the applications of concrete-based SHS across diverse domains, including buildings, concentrated solar power systems, and industrial power generation. It also investigates the thermal properties of concrete relevant for SHS applications and explores the design considerations for concrete SHS systems and reviews the current research landscape and the role of numerical modeling and simulation techniques in optimizing the performance of concrete SHS systems. Various computational methods, such as transient modeling, finite element method (FEM), computational fluid dynamics, and simplified lumped capacitance models, have been employed to analyze and enhance the design of these systems. As research and development continue in this field, several future trends are anticipated.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-024-02548-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel cementless ultra-high performance concrete using calcium carbide residue as activator by the aid of combined curing","authors":"Gai-Fei Peng,&nbsp;Peng-Ju Wang,&nbsp;Yu-Cheng Peng,&nbsp;Gui Zhang,&nbsp;Yan-Zhu Huang,&nbsp;Xu-Jing Niu,&nbsp;Hong Ding","doi":"10.1617/s11527-024-02564-y","DOIUrl":"10.1617/s11527-024-02564-y","url":null,"abstract":"<div><p>In this study, a novel idea of using calcium carbide residue (CCR) as an activator to prepare cementless ultra-high performance concrete (UHPC) was proposed. Ground granulated blast furnace slag (GGBFS) and silica fume (SF) were used as single or composite precursors, activated by CCR, to prepare a series of mortars, which were cured under standard curing, hot water curing and combined curing, respectively. Workability and compressive strength of mortars were tested and the mix proportion of mortar suitable for preparing UHPC was selected. With addition of the steel fiber at a volume dosage of 2%, cementless UHPC was successfully prepared, which had high slump spread (660–701 mm) at fresh state and ultra-high compressive strength (120–175.4 MPa) and splitting tensile strength (10.6–20.4 MPa) after combined curing. Furthermore, the microstructure of cementless UHPC matrix was detected by a variety of microscopic testing methods. The results show that the pozzolanic reaction between Ca(OH)₂ and SiO₂ was significantly accelerated by thermal curing, especially with the addition of SF, which helped produce more C-(A)-S–H gels and a small amount of C-(A)-S–H crystals such as tobermorite and xonotlite, resulting in the refinement of pore structure and significant improvement of compressive strength of the cementless UHPC matrix. In addition, the cost and CO₂ emissions of CCR activated cementless UHPC were considerably lower than those of cement-based UHPC and other cementless UHPC reported in literature.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 1","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-024-02564-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}