Materials and Structures最新文献_第5页

Experimental research into the injectability of cement grouts in reef limestone 珊瑚礁石灰岩中水泥灌浆的可注入性实验研究

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-10-23 DOI: 10.1617/s11527-024-02483-y

Yuhang Tao, Yi Luo, Xiaoqing Wei, Jing Wang, Xinping Li

{"title":"Experimental research into the injectability of cement grouts in reef limestone","authors":"Yuhang Tao, Yi Luo, Xiaoqing Wei, Jing Wang, Xinping Li","doi":"10.1617/s11527-024-02483-y","DOIUrl":"10.1617/s11527-024-02483-y","url":null,"abstract":"<div><p>Reef limestone has special pore structures, which makes its seepage characteristics remarkably different from those of conventional terrestrial tight rocks. In this article, the microscopic structure of reef limestone and the water–cement ratio (WCR), cement fineness, and an admixture on flocculated cement particles were studied. Meanwhile, the probability analysis was adopted to evaluate the injectability for reef limestone cement grouts. The results indicate that the pore size gradually diminishes and the thickness of the wall for cemented walls increases little by little as the density of reef limestone increases. Generally, reef limestone has many seepage channels, indicating strong grout injectivity; when the WCR is larger and the cement fineness is smaller, the number and the size of flocculated cement particles is smaller, so the injectivity of cement grout is improved; this may be enhanced further after use of an admixture. In summary, the volume fraction of flocculated cement particles in cement grouts, as well as the relative sizes of pores and flocculated cement particles, can affect the degree of grout injectability. Injectability results calculated using the theoretical formula based on these influencing factors are found to match those arising from cement-grouting experiments, verifying the practicability and reliability of the injectability probability formula.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 9","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518504","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}

引用次数: 0

Enhancing the freeze thaw resistance of pozzolanic lime mortars by optimising the dewatering process 通过优化脱水工艺提高水泥石灰砂浆的抗冻融性

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-10-22 DOI: 10.1617/s11527-024-02430-x

Tuğçe Büşra Su-Çadırcı, Ceren Ince, Juliana Calabria-Holley, Richard James Ball

{"title":"Enhancing the freeze thaw resistance of pozzolanic lime mortars by optimising the dewatering process","authors":"Tuğçe Büşra Su-Çadırcı, Ceren Ince, Juliana Calabria-Holley, Richard James Ball","doi":"10.1617/s11527-024-02430-x","DOIUrl":"10.1617/s11527-024-02430-x","url":null,"abstract":"<div><p>Freeze–thaw weathering is commonly attributed to the premature degradation of lime mortars. This study is unique as it explores how the effect of incorporating pozzolanic brick dust, combined with the dewatering mechanism, can influence the resistance to freeze–thaw cycling. The combination of brick dust and hydrated lime constitutes a pozzolanic lime mortar with hydraulic character. Importantly, the addition of brick dust was shown to play a crucial role by modifying the pore structure of the mortar matrix, which affected the water transport kinetics, and durability. This rigorous investigation evaluates the freeze and thaw resistance of hardened young (7-day) and old (180-day) mortars in both dewatered and non-dewatered conditions. Quantitative analysis of the microstructure highlights the role of brick dust and dewatering in densifying the matrix, refining the pore structure, and enhancing the freeze and thaw resistance. The benefits of dewatered brick dust mortars were demonstrated as young-age dewatered mortars showed similar resistance to freeze and thaw compared to the older-age non-dewatered mortars. This was attributed to the reduction of the water/binder ratio due to dewatering. It has been successfully demonstrated that freshly mixed mortars can be enhanced on-site through the addition of brick dust and coupling with a substrate that promotes dewatering. Using this approach to produce mortars with greater freeze thaw resistance will improve longevity and reduce failure rates. Impact will be realised in mortars for both new build and conservation applications.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 9","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518462","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}

引用次数: 0

Experimental investigation and analytical model of brick masonry retrofitted by combination of steel and timber members 砖砌体结合钢木构件改造的实验研究和分析模型

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-10-16 DOI: 10.1617/s11527-024-02490-z

Survesh Chetival, Sanjay Chikermane

{"title":"Experimental investigation and analytical model of brick masonry retrofitted by combination of steel and timber members","authors":"Survesh Chetival, Sanjay Chikermane","doi":"10.1617/s11527-024-02490-z","DOIUrl":"10.1617/s11527-024-02490-z","url":null,"abstract":"<div><p>Masonry is a complex structural material with different properties due to a combination of units and mortar. Masonry has very high compressive strength, but when subjected to lateral forces such as earthquakes, its load-carrying capacity reduces significantly because of low tensile capacity. For this research, an experimental study was carried out to study brick masonry's behaviour and failure pattern. A retrofitting scheme was proposed to enhance in-plane load-carrying capacity under push-over loading conditions. A push-over test was performed on the brick masonry walls, and after failure, it was retrofitted and subjected to loading. The retrofitted wall has increased the masonry's load-carrying capacity and enhanced its ductile behaviour, having a yield drift of 8.63%. As the proposed system undergoes large deformations before failure, the behaviour factor R is calculated as 4.53 for ductility of 10.8. Masonry and its components are characterised by performing laboratory experiments and compared with previous studies. The mechanical properties of brick units, mortar, and masonry prism are obtained according to suitable code procedures. An analytical model based on the virtual work approach is developed to estimate failure patterns and load-carrying capacity. The analytical model predicts a failure pattern for conventional brick walls, the same as the experiment failure pattern.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 9","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142443363","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}

引用次数: 0

Assessment of carbonation and corrosion in a 50-year-old reinforced concrete building 评估一座有 50 年历史的钢筋混凝土建筑的碳化和腐蚀情况

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-10-15 DOI: 10.1617/s11527-024-02487-8

Lupesh Dudi, Shashank Bishnoi

{"title":"Assessment of carbonation and corrosion in a 50-year-old reinforced concrete building","authors":"Lupesh Dudi, Shashank Bishnoi","doi":"10.1617/s11527-024-02487-8","DOIUrl":"10.1617/s11527-024-02487-8","url":null,"abstract":"<div><p>This paper presents an investigation conducted on a 50-year-old structure in a composite climactic zone of India. The study comprises two parts, one covering the comparison of long-term natural and short-term accelerated carbonation while another revealing insight into the structure’s durability and potential concerns. Mineralogy, pore solution, and transport properties comparison of natural and accelerated carbonated concrete samples highlight similar modifications, demonstrating the representative nature of accelerated carbonation at 3% carbon dioxide concentration. However, accelerated carbonation led to the preferred precipitation of calcite and a higher degree of C–S–H carbonation. Core strength and carbonation depth measurements indicate that the carbonation coefficient shows a high variation within the structure due to micro-climatic conditions, and there is a need to consider carbon dioxide concentration greater than 400 ppm for residential buildings. Additional investigations based on half-cell potential, surface resistivity, and corrosion rate measurement highlighted that moisture availability is the main deterioration-controlling factor during the propagation phase. Also, it was realized that during an inspection, if different non-destructive measurements fall in the middle range, it becomes inconclusive to ascertain the severity of corrosion. In such situations, visual inspection of the reinforcement is imperative. Finally, the authors recommend collecting data on carbon dioxide concentration and the moisture state of different locations in the structure during structural inspection.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 9","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434753","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}

引用次数: 0

Backcalculation of asphalt concrete Poisson’s ratio using the ultrasonic pulse velocity test 利用超声波脉冲速度测试反算沥青混凝土泊松比

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-10-13 DOI: 10.1617/s11527-024-02486-9

Yujia Lu, Renan Santos Maia, Ramez M. Hajj

{"title":"Backcalculation of asphalt concrete Poisson’s ratio using the ultrasonic pulse velocity test","authors":"Yujia Lu, Renan Santos Maia, Ramez M. Hajj","doi":"10.1617/s11527-024-02486-9","DOIUrl":"10.1617/s11527-024-02486-9","url":null,"abstract":"<div><p>For asphalt mixtures, it is widely known that Poisson’s Ratio (PR) varies according to several parameters, and it is a temperature and loading frequency-dependent property. However, measuring PR at different temperatures and frequencies during mechanical tests is not commonly done. For that, a complex arrangement of fixtures and instruments would be necessary, and still likely not compatible with typical cylindrical specimens. This work aimed to combine the simple and practical Ultrasonic Pulse Velocity (UPV) test with the conventional Dynamic Modulus (<span>(|E^*|)</span>) test used for determining pavement design inputs related to asphalt mixtures. To do this, four typical lower binder asphalt concrete mixes were selected, having different levels of Asphalt Binder Replacement (ABR), given the presence of RAP/RAS, and covering seven different asphalt binders in terms of Performance Grade (PG). Additionally, a baseline mixture with no recycled material was used for comparison. Results show that estimating <span>(|E^*|)</span> via UPV assuming a typical PR value may be inaccurate. Once reference experimental modulus values were available, PR was backcalculated using the UPV theory, showing that this property increases as temperature increases, while it decreases as ABR and air voids increases. This indicates that PR can be a source of significant variability when it comes to the use of recycled materials. Therefore, UPV emerges as a low-cost, practical, and reasonably accurate piece of equipment (compared to state-of-practice assumptions) with potential to be integrated with traditional <span>(|E^*|)</span> testing for an assessment of PR sensitivity according to different mixes’ properties.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 9","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142431058","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}

引用次数: 0

Insight on physical–mechanical properties of one-part alkali-activated materials based on volcanic deposits of Mt. Etna (Italy) and their durability against ageing tests 洞察基于埃特纳火山（意大利）火山沉积物的单组分碱活性材料的物理机械特性及其耐老化测试的耐久性能

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-10-10 DOI: 10.1617/s11527-024-02471-2

Claudio Finocchiaro, Germana Barone, Paolo Mazzoleni, Giuseppe Cultrone

{"title":"Insight on physical–mechanical properties of one-part alkali-activated materials based on volcanic deposits of Mt. Etna (Italy) and their durability against ageing tests","authors":"Claudio Finocchiaro, Germana Barone, Paolo Mazzoleni, Giuseppe Cultrone","doi":"10.1617/s11527-024-02471-2","DOIUrl":"10.1617/s11527-024-02471-2","url":null,"abstract":"<div><p>In recent years, there has been a growing interest in one-part alkali-activated materials, which utilize solid-form alkali activators, within the construction industry. This approach is becoming popular due to its simpler and safer application for cast-in-situ purposes, as compared to the conventional two-part method. At this purpose, we have pioneered the use of volcanic deposits of Mt. Etna volcano (Italy) as precursor for the synthesis of a unique one-part formulation. This was done to assess its performance against both traditional and two-part alkali-activated materials. The study employed a comprehensive range of investigative techniques including X-ray powder diffraction, Fourier transform infrared spectroscopy, hydric tests, mercury intrusion porosimetry, ultrasound, infrared thermography, spectrophotometry, contact angle measurements, uniaxial compressive strength tests, as well as durability tests by salt crystallization and freeze–thaw cycles. The key findings on the studied samples are as follows: i) small size of pores and slow absorption-drying cycles; ii) satisfying compactness and uniaxial compressive strengths for building and restoration interventions; iii) high hydrophily of the surfaces; iv) lower heating dispersion than traditional materials; v) significant damage at the end of the salt crystallization test; vi) excellent resistance to freeze–thaw cycles. These newly developed materials hold promises as environmentally friendly options for construction applications. They offer a simplified mixing process in contrast to the conventional two-part alkali-activated materials, thus providing an added advantage to this class of materials.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 9","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-024-02471-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142411201","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}

引用次数: 0

Coupling performance of the interface between sensor and concrete by the double shear method 用双剪切法测量传感器与混凝土界面的耦合性能

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-10-10 DOI: 10.1617/s11527-024-02481-0

Chuankun Liu, Ya Wei

{"title":"Coupling performance of the interface between sensor and concrete by the double shear method","authors":"Chuankun Liu, Ya Wei","doi":"10.1617/s11527-024-02481-0","DOIUrl":"10.1617/s11527-024-02481-0","url":null,"abstract":"<div><p>The rupture of sensor packaging shells and debonding at the interface between the embedded sensors and the surrounding concrete are considered as the primary causes of signal interruption in the structural health monitoring of infrastructure. Ensuring the coupling performance between the embedded sensor and the surrounding concrete is crucial for the long-term structural health monitoring. To investigate the coupling performance of the interface between the sensor and the surrounding concrete, a new interface double shear test device is designed and manufactured. Factors considered in the study include the sensor packaging materials (304 stainless steel, glass fiber reinforced nylon), whether the interface is coated with epoxy adhesive sand or not, the coating density of epoxy adhesive sand, and the water-to-cement ratio of the matrix concrete (<i>w</i>/<i>c</i> ratio = 0.3, 0.4, 0.5). The load-slip curves, interfacial shear strength, and slip value at the peak load are systematically analyzed. A comparative analysis of the failure modes and failure morphology of specimens is also conducted. The shear bonding mechanism between the sensor and the matrix concrete is revealed, and an interfacial coupling model is established. The research findings can provide reference and guidance for optimizing the design of embedded sensor packaging, improving packaging processes, and enhancing interface coupling, thus achieving the long-term accurate monitoring of infrastructure.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 9","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142411211","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}

引用次数: 0

Measurement and characterization of asphalt fatigue behavior under multi-factor effects 测量和描述多因素影响下的沥青疲劳行为

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-10-10 DOI: 10.1617/s11527-024-02473-0

Chunmeng Zheng, Peifeng Cheng, Yiming Li, Qichao Gao, Kai Huang, Dezhong Yu, Yongcheng Ji

{"title":"Measurement and characterization of asphalt fatigue behavior under multi-factor effects","authors":"Chunmeng Zheng, Peifeng Cheng, Yiming Li, Qichao Gao, Kai Huang, Dezhong Yu, Yongcheng Ji","doi":"10.1617/s11527-024-02473-0","DOIUrl":"10.1617/s11527-024-02473-0","url":null,"abstract":"<div><p>Throughout the service life, multiple factors influence the fatigue properties of asphalt binders, including the modifier type, aging, freeze–thaw cycles, and ambient temperature. However, there is a significant dearth of studies targeting the collective impact of multiple factors on fatigue characteristics, and the extent to which each factor contributes has not been adequately quantified. To investigate the effects of variables and quantify the extent to which each factor contributes, the linear amplitude sweep test (LAS) was conducted to explore the effects of several factors on asphalt fatigue performance. Pearson correlation analysis and multi-factor analysis of variance were employed to study the extent and law of these effects. Results indicated that each factor exerts an influence on asphalt fatigue properties. Among them, the temperature exhibited the most pronounced effect on fatigue characteristics, followed closely by the modifier type and freeze–thaw cycles. The correlations between the criteria assessed through the LAS test and environmental factors exhibit variations. A noteworthy correlation was observed between fatigue life and both the modifier type and freeze–thaw cycles, analogous to the peak phase angle and aging, as well as the relationship between yield stress and temperature. It’s highly recommended to use appropriate evaluation criteria to assess the asphalt fatigue characteristics under varying conditions. The most substantial impact on fatigue characteristics was observed when subjected to 25 °C and 50 freeze–thaw cycles, as compared to other conditions. The method enables a comprehensive investigation of how temperature and freeze–thaw cycles affect the properties of asphalt fatigue characteristics. The findings will serve as valuable references for material selection and the assessment of long-life asphalt pavement.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 9","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142411181","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}

引用次数: 0

Enhanced hydration reaction of synthesized C4A0.81F1.19 with the use of different grinding agents 使用不同研磨剂增强合成的 C4A0.81F1.19 的水化反应

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-10-10 DOI: 10.1617/s11527-024-02476-x

Hyunuk Kang, Yangwoo Lee, Sungjin Jung, Juhyuk Moon

{"title":"Enhanced hydration reaction of synthesized C4A0.81F1.19 with the use of different grinding agents","authors":"Hyunuk Kang, Yangwoo Lee, Sungjin Jung, Juhyuk Moon","doi":"10.1617/s11527-024-02476-x","DOIUrl":"10.1617/s11527-024-02476-x","url":null,"abstract":"<div><p>Tetracalcium aluminoferrite (C<sub>4</sub>AF) presents in ordinary Portland cement (OPC) as a solid solution phase, as C<sub>4</sub>A<sub><i>x</i></sub>F<sub>2−<i>x</i></sub> (0.7 ≤ <i>x</i> ≤ 1.1). There is a limited understanding of the hydration reactions of C<sub>4</sub>AF, particularly regarding the influence of alkanolamines (AA) on C<sub>4</sub>AF, which can substantially alter OPC hydration. In this study, synthesized C<sub>4</sub>A<sub>0.81</sub>F<sub>1.19</sub> was subjected to grinding, using three different AA (triisopropanolamine, ethanol diisopropanolamine, and diethanol isopropanolamine) at dosages of 0, 0.1, and 0.3%. It was experimentally confirmed that the crystal structure of unhydrated C<sub>4</sub>AF was partially changed during the grinding process, and the hydration properties of C<sub>4</sub>AF were modified. From these results, the compressive strength improved significantly, and the rate of strength enhancement was the highest with 0.1% of diethanol isopropanolamine. More specifically, it was revealed that both Fe and Al sources were proficiently activated, leading to the production of Al/Fe-containing AFm phases and efficiently enhanced mechanical properties.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 9","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-024-02476-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142411230","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}

引用次数: 0

A 10-year study of the corrosion resistance of stainless steels used as reinforcement in chloride-contaminated concrete exposed to severe conditions 对暴露在严酷条件下受氯化物污染的混凝土中用作钢筋的不锈钢的耐腐蚀性进行为期 10 年的研究

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-10-10 DOI: 10.1617/s11527-024-02468-x

Véronique Bouteiller, Thierry Chaussadent, Eric Chauveau, Amandine Bonnet, Philippe Mauger, Victor Da-Silva

{"title":"A 10-year study of the corrosion resistance of stainless steels used as reinforcement in chloride-contaminated concrete exposed to severe conditions","authors":"Véronique Bouteiller, Thierry Chaussadent, Eric Chauveau, Amandine Bonnet, Philippe Mauger, Victor Da-Silva","doi":"10.1617/s11527-024-02468-x","DOIUrl":"10.1617/s11527-024-02468-x","url":null,"abstract":"<div><p>The corrosion of carbon steel reinforcements is the main cause of deterioration in reinforced concrete structures. Stainless steel can be a solution to increase the service life of structures exposed to severe chloride environments. This paper describes the results obtained in an experimental study seeking to monitor corrosion over a long-term period (10 years) without the use of accelerated tests. Concrete samples containing admixed chloride and reinforced with 5 different steel grades were exposed to high temperature and high relative humidity in a climatic chamber for 10 years. Visual inspection, corrosion potential, linear polarisation resistance and electrochemical impedance spectroscopy measurements were carried out throughout this period. Corrosion current density was calculated to monitor the evolution of corrosion. The methodology was validated on a martensitic stainless steel (grade 1.4021) with the original finding that corrosion occurs over three time steps. None of the duplex steels (grades 1.4062, 1.4362 and 1.4462) showed corrosion after 10 years, making them a very interesting solution for structures located in severe chloride environments. Mass loss corrosion laws over time were determined. Prediction of corrosion was discussed.Please check and confirm the edit made in the article title.confirmedKindly check and confirm the organization name for affiliations 1 and 2.affiliation 1: OK\u0000affiliation 2: OK</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 9","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142411184","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}

引用次数: 0