Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Lessons Learnt from a Premature Failure of Stone Matrix Asphalt (SMA) on a High-Volume Indian Highway
This paper discusses the lessons learnt from a premature pavement failure investigation of an Stone Matrix Asphalt (SMA) surface course laid to rehabilitate one of the most heavily laden National Highways in India. A detailed laboratory investigation was carried out to evaluate the causes of the failure. In addition to testing the samples from the field, the study also verified the applicability of an acid–base titration method to quantify the lime content in the field asphalt mixes. Considering the higher proportion of mineral filler in SMA mixes, a laboratory investigation was conducted as a part of this study to examine the influence of filler fractional voids on the properties of the SMA mixes. Along with the causes of the failure, the paper also emphasizes the pitfalls associated with the SMA construction. The paper also highlights the implications of these pitfalls and lessons learnt during the implementation of the project. One of the aims of the paper is to recommend best practices based on the lessons learnt, specifically etiquettes that are specific for SMA construction and that are not well established. Results of the additional laboratory studies as a part of the investigation showed that the filler fraction voids influenced the mix workability and the bitumen demand. Lime filler with high fractional voids resulted in mixes with lower workability and higher bitumen demand. The findings emphasize the importance of quality control tests for lime filler when used in SMA mixes.
Lessons Learnt from a Premature Failure of Stone Matrix Asphalt (SMA) on a High-Volume Indian Highway
This paper discusses the lessons learnt from a premature pavement failure investigation of an Stone Matrix Asphalt (SMA) surface course laid to rehabilitate one of the most heavily laden National Highways in India. A detailed laboratory investigation was carried out to evaluate the causes of the failure. In addition to testing the samples from the field, the study also verified the applicability of an acid–base titration method to quantify the lime content in the field asphalt mixes. Considering the higher proportion of mineral filler in SMA mixes, a laboratory investigation was conducted as a part of this study to examine the influence of filler fractional voids on the properties of the SMA mixes. Along with the causes of the failure, the paper also emphasizes the pitfalls associated with the SMA construction. The paper also highlights the implications of these pitfalls and lessons learnt during the implementation of the project. One of the aims of the paper is to recommend best practices based on the lessons learnt, specifically etiquettes that are specific for SMA construction and that are not well established. Results of the additional laboratory studies as a part of the investigation showed that the filler fraction voids influenced the mix workability and the bitumen demand. Lime filler with high fractional voids resulted in mixes with lower workability and higher bitumen demand. The findings emphasize the importance of quality control tests for lime filler when used in SMA mixes.
Lessons Learnt from a Premature Failure of Stone Matrix Asphalt (SMA) on a High-Volume Indian Highway
Lecture Notes in Civil Engineering
Rastogi, Rajat (Herausgeber:in) / Bharath, G. (Herausgeber:in) / Singh, Dharamveer (Herausgeber:in) / Mondal, Purbayan Ghosh (Autor:in) / Baditha, Anil Kumar (Autor:in) / Ahriwar, Dharamdas (Autor:in) / Chattaraj, Rajib (Autor:in) / Kuna, Kranthi Kumar (Autor:in)
International Conference on Transportation Infrastructure Projects : Conception to Execution ; 2022 ; Haridwar, India
22.07.2023
12 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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