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Performance of pomegranate peel extract coated rebars in concrete 石榴皮提取物包覆钢筋在混凝土中的性能
Građevinar Pub Date : 2023-10-01 DOI: 10.14256/jce.3511.2022
{"title":"Performance of pomegranate peel extract coated rebars in concrete","authors":"","doi":"10.14256/jce.3511.2022","DOIUrl":"https://doi.org/10.14256/jce.3511.2022","url":null,"abstract":"This paper aimed to develop an affordable, eco-friendly, and accessible natural inhibitor derived from the peel of the pomegranate fruit. An extract was prepared from the pomegranate peel and utilised as a corrosion-resistant coating known as pomegranate peel extract (PPE) applied to the steel rebar. The corrosion resistance of the PPE-coated steel was evaluated using accelerated carbonation, impressed voltage, half-cell potential, weight loss, and accelerated corrosion tests. The carbonation test revealed that the uncoated steel rebar displayed patches, indicating carbonation, whereas the PPE-coated rebar was not affected, demonstrating an uncarbonated zone. Moreover, the half-cell potential test clearly indicated that the PPE-coated steel rod exhibited a moderate risk of corrosion with a potential of -247 mV. Particularly, the weight loss of the uncoated conventional steel was 40 % greater than that experienced by the PPE-coated rod. In the accelerated corrosion test, the PPE-coated rods took longer to develop initial cracks in the concrete, with durations of 182, 206, and 230 h for samples 1, 2, and 3, respectively, which were comparatively higher than those of conventional concrete. Thus, the test results of the PPE-coated steel were compared with those of the uncoated conventional steel, and the performance of the PPE-coated rod in terms of corrosion resistance was evaluated.","PeriodicalId":145265,"journal":{"name":"Građevinar","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135762437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic behaviour of prestressed concrete beams considering moving loads 考虑移动荷载的预应力混凝土梁的动力特性
Građevinar Pub Date : 2023-10-01 DOI: 10.14256/jce.3437.2021
{"title":"Dynamic behaviour of prestressed concrete beams considering moving loads","authors":"","doi":"10.14256/jce.3437.2021","DOIUrl":"https://doi.org/10.14256/jce.3437.2021","url":null,"abstract":"Herein, the dynamic response rule of prestressed concrete beams with metal and plastic corrugated pipes with different duct grouting compactness values under moving constant concentrated loads and moving simple harmonic loads is studied. Prestressed concrete beams with metal and plastic corrugated pipes are analysed using the finite element method for the case of non-cracking. The results indicate that duct grouting compactness and forming material affect the natural vibration characteristics of prestressed concrete beams. Under identical duct grouting compactness, prestressed concrete beams with metal corrugated pipes exhibit higher frequencies compared with those with plastic corrugated pipes. The mid-span dynamic deflection of the prestressed concrete beams decreases with an increase in duct grouting compactness, which is independent of the forming material. The differences in the midspan speed and acceleration caused by the moving loads between the corrugated duct prestressed concrete beams made of metal and those made of plastic are small; this indicates that the pore-forming material has little effect on the midspan node speed and acceleration response of prestressed concrete beams.","PeriodicalId":145265,"journal":{"name":"Građevinar","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135762430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Climate change effect on durability of bridges and other infrastructure 气候变化对桥梁和其他基础设施耐久性的影响
Građevinar Pub Date : 2023-10-01 DOI: 10.14256/jce.3756.2023
{"title":"Climate change effect on durability of bridges and other infrastructure","authors":"","doi":"10.14256/jce.3756.2023","DOIUrl":"https://doi.org/10.14256/jce.3756.2023","url":null,"abstract":"Climate change has significant implications for structures which will continue to increase in the future, particularly bridges and other strategic infrastructure with longer service life exposed to aggressive environments. In this paper, a projection of climate change for Croatia for periods up to 2040 and up to 2070 is presented with potential impacts on bridges and other structures. By reviewing scientific research results, the impact of climate change on the durability and seismic capacity of concrete structures as well as effects on loads on structures is presented.","PeriodicalId":145265,"journal":{"name":"Građevinar","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135762435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Energy principle application to response of viscoelastic bars 能量原理在粘弹性杆响应中的应用
Građevinar Pub Date : 2023-10-01 DOI: 10.14256/jce.3739.2023
Stjepan Lakusic
{"title":"Energy principle application to response of viscoelastic bars","authors":"Stjepan Lakusic","doi":"10.14256/jce.3739.2023","DOIUrl":"https://doi.org/10.14256/jce.3739.2023","url":null,"abstract":"A wide range of practical engineering problems exists for which obtaining exact solutions directly is challenging. This is because of the complex nature of the governing differential equations or the difficulties arising from the boundary and initial conditions of the problem. To address these problems, scalar quantities, such as work and energy, are used as an alternative approach. The virtual work principle constitutes the basis for the energy and variational formulations. This study uses energy concepts to formulate viscoelastic structures and discuss the statically indeterminate axially loaded viscoelastic bar problem. A simple and efficient energy-based formulation for analysis is proposed. The total potential energy (TPE) expression in terms of the displacements of the nodes was obtained in Laplace space. The solutions that minimise the TPE expression are real displacements, and the inverse Laplace transform method is applied to transform the function back into the time domain. Different examples were considered to ensure accuracy and demonstrate the potential of the proposed solution technique. This method is convenient for obtaining a solution directly by following a few simple process steps, regardless of the change in the viscoelastic material model, the number of elements in the system, and the type of loading.","PeriodicalId":145265,"journal":{"name":"Građevinar","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135762429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Novel approaches and materials for healing asphalt cracks 修复沥青裂缝的新方法和新材料
Građevinar Pub Date : 2023-10-01 DOI: 10.14256/jce.3721.2023
{"title":"Novel approaches and materials for healing asphalt cracks","authors":"","doi":"10.14256/jce.3721.2023","DOIUrl":"https://doi.org/10.14256/jce.3721.2023","url":null,"abstract":"Premature cracks in an asphalt pavement may damage its intact structure, substantially decrease its load-bearing capacity, degrade its driving comfort and safety, and even lead to total pavement failure. This paper provides a detailed state-of-the-art review regarding the impact of new approaches and materials on the curing of asphalt cracking, along with an explanation of their advantages, deficiencies, improvement opportunities, and future perspectives. By providing this background information, this study intends to contribute to the discovery of ground-breaking technical solutions and cost-effective materials to remedy premature asphalt pavement cracks at the right place and time. Future studies are recommended to advance efforts to discover more effective, practical, cost-saving, sustainable, and eco-friendly methods and agents for healing asphalt cracks.","PeriodicalId":145265,"journal":{"name":"Građevinar","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135762439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Durability study on ambient cured geopolymer concrete made with various molarities of NaOH 不同氢氧化钠摩尔浓度环境固化地聚合物混凝土耐久性研究
Građevinar Pub Date : 2023-09-01 DOI: 10.14256/jce.3462.2022
{"title":"Durability study on ambient cured geopolymer concrete made with various molarities of NaOH","authors":"","doi":"10.14256/jce.3462.2022","DOIUrl":"https://doi.org/10.14256/jce.3462.2022","url":null,"abstract":"Geopolymer concrete is an innovative variation of the conventional construction material that reduces the environmental impact of producing Ordinary Portland Cement (OPC) while simultaneously improving the efficient use of industrial by-products. By altering the molarities of sodium hydroxide to 4M, 6M, 8M, 10M, and 12M, five combinations of geopolymer concrete were prepared for this study. After 28 days of curing at room temperature, the strength properties, viz., the compressive strength (DT and NDT), the splitting tensile strength, and the flexural strength were evaluated. Additionally, the durability properties such as the initial water absorption, saturated water absorption, sorptivity, average effective porosity, abrasion resistance, and chemical attack resistance were studied as well. All the findings of the geopolymer concrete were compared to those of the M35 grade OPC concrete. The experimental test results showed that, with the exception of GPC-4M, the other Geopolymer concrete mixtures met the target strength requirements of the M35 grade concrete. The findings revealed that the GPC-8M concrete specimens performed the best in terms of strength and durability. Consequently, widespread use of geopolymer concrete, which is prepared with fly ash (FA) and ground granulated blast-furnace slag and cured in ambient air, is recommended instead of OPC concrete.","PeriodicalId":145265,"journal":{"name":"Građevinar","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134916302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Life cycle analysis of reinforced concrete floor slab through three different waste management scenarios 通过三种不同废物处理方案分析钢筋混凝土楼板的生命周期
Građevinar Pub Date : 2023-09-01 DOI: 10.14256/jce.3696.2023
{"title":"Life cycle analysis of reinforced concrete floor slab through three different waste management scenarios","authors":"","doi":"10.14256/jce.3696.2023","DOIUrl":"https://doi.org/10.14256/jce.3696.2023","url":null,"abstract":"This paper presents a life cycle analysis (LCA) of a reinforced concrete floor slab with special emphasis on the end of life (EoL). Three EoL waste management scenarios were presented: Scenario I (current situation of construction and demolition waste management in the Republic of Croatia), Scenario II (100% landfilling of construction and demolition waste), and Scenario III (complete recycling of construction and demolition waste). The aim of this study is to demonstrate the environmental benefits of recycling in terms of sustainable construction and to determine the phases in the life of reinforced concrete floor slabs that have the greatest negative impact on the environment. From the analysis, the largest negative contribution to the environmental impacts is in the production phase, which includes the supply of raw materials, their processing, and the transportation of products to the concrete and reinforcement plants. EoL analysis showed that the manner in which construction and demolition waste is managed has a significant impact on the values of the impact categories of human toxicity (HTP), freshwater and marine aquatic ecotoxicity (FAETP and MAETP), terrestrial ecotoxicity (TETP), and eutrophication (EP). Conducting an LCA focusing on the EoL is critical, as it can provide valuable insights into the environmental impacts of the disposal phase and help develop strategies for sustainable waste management.","PeriodicalId":145265,"journal":{"name":"Građevinar","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134916305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bamboo as reinforcing material in concrete structures: A literature study 竹材在混凝土结构中的加固作用:文献研究
Građevinar Pub Date : 2023-09-01 DOI: 10.14256/jce.3681.2022
Stjepan Lakusic
{"title":"Bamboo as reinforcing material in concrete structures: A literature study","authors":"Stjepan Lakusic","doi":"10.14256/jce.3681.2022","DOIUrl":"https://doi.org/10.14256/jce.3681.2022","url":null,"abstract":"The production of conventional building materials such as steel, concrete, and brick causes severe exploitation of natural resources and emission of greenhouse gases. Therefore, alternative eco-friendly, sustainable, and inexpensive building materials are required. Bamboo is a natural material which can replace steel in various structures. Several studies have evaluated the potential of bamboo as a steel replacement in structures. This paper provides a literature review on the use of bamboo-reinforced concretes (BRC) in various countries.","PeriodicalId":145265,"journal":{"name":"Građevinar","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134916545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of toughness limit in assessment of soil compaction identifiers 韧性极限在土壤压实标识评价中的应用
Građevinar Pub Date : 2023-09-01 DOI: 10.14256/jce.3663.2022
{"title":"Application of toughness limit in assessment of soil compaction identifiers","authors":"","doi":"10.14256/jce.3663.2022","DOIUrl":"https://doi.org/10.14256/jce.3663.2022","url":null,"abstract":"In geotechnical engineering, the precise evaluation of compaction parameters is essential for quality control assessment. One option is the use of the toughness limit (TL), concisely defined as the water content, at which the behaviour of fine-grained soils evolves from an almost adhesive-plastic to tough-plastic. A database consisting of more than 1000 test results, including the compaction characteristics and Atterberg limits, was compiled to establish correlations between the TL, Atterberg limits, optimum degree of saturation, and compaction properties. The results revealed that the TL has the potential to evaluate many indices and compaction identifiers for different types of soils.","PeriodicalId":145265,"journal":{"name":"Građevinar","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134916303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Utilising cellulose fibre in stone mastic asphalt 纤维素纤维在石浆沥青中的应用
Građevinar Pub Date : 2023-09-01 DOI: 10.14256/jce.3726.2023
{"title":"Utilising cellulose fibre in stone mastic asphalt","authors":"","doi":"10.14256/jce.3726.2023","DOIUrl":"https://doi.org/10.14256/jce.3726.2023","url":null,"abstract":"In this study, the optimum amount of cellulose fibre (CF) use was evaluated to better understand its influence on the volumetric design parameters of stone mastic asphalt (SMA) with polymer-modified bitumen (PMB). SMA-PMB specimens were manufactured, and their primary volumetric properties were compared with those of the respective SMA-PMB mixtures without CF. The results revealed that the addition of CF as a stabilising agent increased the optimal binder content, voids in the mineral aggregate, and voids filled with binder but decreased air voids and bulk specific gravity. The results suggest that the utilisation of CF, along with an increased optimum binder content, slightly increased the primary manufacturing cost of SMAs.","PeriodicalId":145265,"journal":{"name":"Građevinar","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134916543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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