Recycled asphalt is used in this paper as replacement for a part of cement in the production of cement composite. A part of cement was replaced with a sieved recycled asphalt powder in the proportion of 5 to 15 % of the cement weight. The testing comprised the analysis of density, Blaine specific surface area, setting time, particle size distribution, compressive strength, resistance to freezing and thawing, water absorption, and the SEM-EDS and XRD analyses. The results show that the density, compressive strength, and Blaine surface area decrease, and that toughness increases, with an addition of recycled asphalt into cement composite.
{"title":"Mechanical properties of mortar containing recycled asphalt","authors":"O. C. Sola, C. Ozyazgan","doi":"10.14256/JCE.1684.2016","DOIUrl":"https://doi.org/10.14256/JCE.1684.2016","url":null,"abstract":"Recycled asphalt is used in this paper as replacement for a part of cement in the production of cement composite. A part of cement was replaced with a sieved recycled asphalt powder in the proportion of 5 to 15 % of the cement weight. The testing comprised the analysis of density, Blaine specific surface area, setting time, particle size distribution, compressive strength, resistance to freezing and thawing, water absorption, and the SEM-EDS and XRD analyses. The results show that the density, compressive strength, and Blaine surface area decrease, and that toughness increases, with an addition of recycled asphalt into cement composite.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66963187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The investigation of flexural behaviour of ferrocement elements that are used as permanent formwork in conventional reinforced concrete members is presented in the paper. Individual ferrocement panels are tested under two-point and midpoint load, and the load-deflection behaviour is then studied. The ferrocement panels are provided with shear connectors to investigate interaction between ferrocement and conventional RC members. The experimental results are compared with those obtained through finite element models using the ANSYS software, and a good correspondence of these results was established.
{"title":"Experimental and numerical analysis of ferrocement RC composite","authors":"S. Lakušić","doi":"10.14256/JCE.1799.2016","DOIUrl":"https://doi.org/10.14256/JCE.1799.2016","url":null,"abstract":"The investigation of flexural behaviour of ferrocement elements that are used as permanent formwork in conventional reinforced concrete members is presented in the paper. Individual ferrocement panels are tested under two-point and midpoint load, and the load-deflection behaviour is then studied. The ferrocement panels are provided with shear connectors to investigate interaction between ferrocement and conventional RC members. The experimental results are compared with those obtained through finite element models using the ANSYS software, and a good correspondence of these results was established.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66963929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Results of experimental investigation of concrete containing waste tyre crumb rubber are presented in the paper to determine mechanical properties such as the compressive strength, splitting tensile strength, and flexural strength of concrete. The C35/45 compressive strength class concrete was used in this study. Five to twenty-five per cent of sand volume was replaced with waste tire crumb rubber, and the results were compared to ordinary concrete test results. The results revealed that the performance slightly increased by 1.46 % and 1.96 % at 5 % and 10% of crumb rubber replacement compared to ordinary concrete.
{"title":"Flexural fatigue performance and mechanical properties of rubberized concrete","authors":"S. Lakušić","doi":"10.14256/JCE.1427.2015","DOIUrl":"https://doi.org/10.14256/JCE.1427.2015","url":null,"abstract":"Results of experimental investigation of concrete containing waste tyre crumb rubber are presented in the paper to determine mechanical properties such as the compressive strength, splitting tensile strength, and flexural strength of concrete. The C35/45 compressive strength class concrete was used in this study. Five to twenty-five per cent of sand volume was replaced with waste tire crumb rubber, and the results were compared to ordinary concrete test results. The results revealed that the performance slightly increased by 1.46 % and 1.96 % at 5 % and 10% of crumb rubber replacement compared to ordinary concrete.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66958978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. F. Smrkić, Domagoj Damjanović, Anamaria Baričević
Dodavanjem čeličnih vlakana u beton poboljšavaju se njegova svojstva pri zamoru. Opisana su eksperimentalna istraživanja betonskih elemenata s recikliranim čeličnim vlaknima pri cikličkom opterećenju. Prikazani su proračunski modeli zamora prema fib Model Code 2010, ACI 215 i JSCE smjernicama. Rezultati proračunskih modela uspoređeni su s rezultatima eksperimentalnog istraživanja. Uočeno je da, u pravilu, svi proračunski modeli podcjenjuju eksperimentalno određenu otpornost betona pri zamoru. Dan je prijedlog korekcije fib Model Code modela.
{"title":"Primjena recikliranih čeličnih vlakana u betonskim elementima izloženima zamoru","authors":"M. F. Smrkić, Domagoj Damjanović, Anamaria Baričević","doi":"10.14256/JCE.2059.2017","DOIUrl":"https://doi.org/10.14256/JCE.2059.2017","url":null,"abstract":"Dodavanjem čeličnih vlakana u beton poboljšavaju se njegova svojstva pri zamoru. Opisana su eksperimentalna istraživanja betonskih elemenata s recikliranim čeličnim vlaknima pri cikličkom opterećenju. Prikazani su proračunski modeli zamora prema fib Model Code 2010, ACI 215 i JSCE smjernicama. Rezultati proračunskih modela uspoređeni su s rezultatima eksperimentalnog istraživanja. Uočeno je da, u pravilu, svi proračunski modeli podcjenjuju eksperimentalno određenu otpornost betona pri zamoru. Dan je prijedlog korekcije fib Model Code modela.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47499075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigation of GFRP strengthened RC non-slender columns under eccentric loading","authors":"G. Vesmawala, P. Kodag","doi":"10.14256/JCE.1591.2016","DOIUrl":"https://doi.org/10.14256/JCE.1591.2016","url":null,"abstract":"","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48458688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Condition assessment and continuous monitoring of the existing timber structures have been gaining in importance in recent times. The global objective of sustainable development has been greatly directed toward preservation of the existing structures and protection of architectural heritage. Methods used for assessing condition of the existing timber structures are presented in the paper. The main emphasis is placed on the presentation of non-destructive and semi-destructive methods for frequently used timber structures. The methods are presented through the example of condition assessment of the Nikola Tesla Technical Museum in Zagreb.
{"title":"Inspection and condition assessment of existing timber structures","authors":"M. Stepinac, V. Rajčić, J. Barbalić","doi":"10.14256/JCE.1994.2017","DOIUrl":"https://doi.org/10.14256/JCE.1994.2017","url":null,"abstract":"Condition assessment and continuous monitoring of the existing timber structures have been gaining in importance in recent times. The global objective of sustainable development has been greatly directed toward preservation of the existing structures and protection of architectural heritage. Methods used for assessing condition of the existing timber structures are presented in the paper. The main emphasis is placed on the presentation of non-destructive and semi-destructive methods for frequently used timber structures. The methods are presented through the example of condition assessment of the Nikola Tesla Technical Museum in Zagreb.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48496664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The paper examines factors influencing the decision to use, and adoption rate, of online reverse auctions in construction sector. The main factors are identified and comprehensively discussed taking into account particularities of construction industry. The adoption level of this procurement route is examined via a web survey based on a selected sample of construction companies and clients from the Czech construction sector. It was established that online reverse auctions are the most widely used e-procurement tool in the Czech construction sector. Advantages of this procurement procedure are more significantly perceived by investors.
{"title":"On-line reverse auctions in construction industry","authors":"T. Hanák, J. Šelih","doi":"10.14256/JCE.1352.2015","DOIUrl":"https://doi.org/10.14256/JCE.1352.2015","url":null,"abstract":"The paper examines factors influencing the decision to use, and adoption rate, of online reverse auctions in construction sector. The main factors are identified and comprehensively discussed taking into account particularities of construction industry. The adoption level of this procurement route is examined via a web survey based on a selected sample of construction companies and clients from the Czech construction sector. It was established that online reverse auctions are the most widely used e-procurement tool in the Czech construction sector. Advantages of this procurement procedure are more significantly perceived by investors.","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.14256/JCE.1352.2015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66957172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Estimating investment value in railway lines reconstruction process","authors":"S. Lakušić","doi":"10.14256/JCE.1013.2014","DOIUrl":"https://doi.org/10.14256/JCE.1013.2014","url":null,"abstract":"","PeriodicalId":50415,"journal":{"name":"Gradevinar","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66950812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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