{"title":"Comparison of fracture parameters obtained from modified semi-circular bending (SCB) test","authors":"P. Vacková, J. Valentin","doi":"10.7409/RABDIM.021.011","DOIUrl":null,"url":null,"abstract":"For several years the crack propagation test data of asphalt mixtures according to CSN EN 12697-44 have been collected and evaluated at the Czech Technical University in Prague. Over time, the standardised test procedure has been adapted to better suit the conditions and practice typical of the Czech Republic – in terms of test specimen compaction, availability of cutting discs of suitable thickness, diameter of test specimens, loading speed etc. Modifications encompassed some of the test conditions as well as the procedures of data logging and subsequent evaluation of raw data. It has also been gradually established that the strict focus on fracture toughness, assumed by the European standard to be used as the only suitable qualitative parameter, is probably incorrect, or at least ineffective. The characteristics of fracture energy have been introduced and further studied.","PeriodicalId":44000,"journal":{"name":"Roads and Bridges-Drogi i Mosty","volume":"82 1","pages":"173-187"},"PeriodicalIF":0.5000,"publicationDate":"2021-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Roads and Bridges-Drogi i Mosty","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.7409/RABDIM.021.011","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
For several years the crack propagation test data of asphalt mixtures according to CSN EN 12697-44 have been collected and evaluated at the Czech Technical University in Prague. Over time, the standardised test procedure has been adapted to better suit the conditions and practice typical of the Czech Republic – in terms of test specimen compaction, availability of cutting discs of suitable thickness, diameter of test specimens, loading speed etc. Modifications encompassed some of the test conditions as well as the procedures of data logging and subsequent evaluation of raw data. It has also been gradually established that the strict focus on fracture toughness, assumed by the European standard to be used as the only suitable qualitative parameter, is probably incorrect, or at least ineffective. The characteristics of fracture energy have been introduced and further studied.
多年来，捷克布拉格技术大学收集并评估了符合CSN EN 12697-44标准的沥青混合料裂缝扩展试验数据。随着时间的推移，标准化测试程序已经适应了更好地适应捷克共和国的条件和典型实践-在试样压实，适当厚度的切割盘的可用性，试样的直径，加载速度等方面。修改包括一些测试条件以及数据记录和原始数据的后续评估程序。人们也逐渐认识到，欧洲标准将严格关注断裂韧性作为唯一合适的定性参数，这可能是不正确的，或者至少是无效的。介绍了断裂能的特征，并对其进行了进一步研究。
期刊介绍：
The quarterly journal Roads and Bridges – Drogi i Mosty is published by the Road and Bridge Research Institute since September 2012 as a bilingual English-Polish journal. From 2002 to 2012 the journal was printed under the title Drogi i Mosty. The journal mission is to promote current achievements in science and technology in the field of road and bridge engineering. The journal is intended as a forum of the exchange of innovative concepts and solutions between the researches from different countries. Original scientific and technical papers in the field of civil engineering and related engineering sciences are published. The scope of Roads and Bridges – Drogi i Mosty includes design, construction, maintenance and safe use of roads, bridges, airports and other transportation structures.
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