Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of Nominal Maximum Aggregate Size and Bitumen Content on Frictional Properties of Different Bituminous Surface Courses
Skid resistance, a measure of the force produced when a vehicle tire is prevented from sliding along the road surface, is a salient functional requirement of a pavement surface. Skid resistance is influenced by several factors, such as road surface texture, aggregate characteristics, aggregate gradation, binder content, surface temperature, and environmental conditions (presence of water film). This study investigated the frictional characteristics of three different asphalt surface courses, which included bituminous concrete (BC), open-graded friction course (OGFC), and stone matrix asphalt (SMA). The different factors considered during skid resistance measurement are: dry and wet surface conditions, varying nominal maximum aggregate size (NMAS—BC: 19.0 mm and 13.2 mm; OGFC: 19.0 mm and 12.5 mm; SMA: 13.2 mm and 9.5 mm), and variable binder content/percentage (for BC—5.5, 6.0, and 6.5%; for OGFC: 6.0, 6.5, and 7.0%; for SMA: 6.0, 6.5, and 7.0%). The British pendulum and sand patch test methods were used to evaluate the frictional/skid resistance and surface texture properties of these mixtures, respectively. OGFC mixtures showed better frictional characteristics compared to BC and SMA mixes. Texture depth played an important role in the development of friction, especially during the presence of water over the mix surface. Furthermore, the presence of a water film had a detrimental impact on frictional efficiency, i.e., higher water depth resulted in lower frictional resistance. Surface texture for different types of asphalt mixes (BC, SMA, and OGFC) had a fairly good correlation with skid resistance under both dry and wet conditions.
Effect of Nominal Maximum Aggregate Size and Bitumen Content on Frictional Properties of Different Bituminous Surface Courses
Skid resistance, a measure of the force produced when a vehicle tire is prevented from sliding along the road surface, is a salient functional requirement of a pavement surface. Skid resistance is influenced by several factors, such as road surface texture, aggregate characteristics, aggregate gradation, binder content, surface temperature, and environmental conditions (presence of water film). This study investigated the frictional characteristics of three different asphalt surface courses, which included bituminous concrete (BC), open-graded friction course (OGFC), and stone matrix asphalt (SMA). The different factors considered during skid resistance measurement are: dry and wet surface conditions, varying nominal maximum aggregate size (NMAS—BC: 19.0 mm and 13.2 mm; OGFC: 19.0 mm and 12.5 mm; SMA: 13.2 mm and 9.5 mm), and variable binder content/percentage (for BC—5.5, 6.0, and 6.5%; for OGFC: 6.0, 6.5, and 7.0%; for SMA: 6.0, 6.5, and 7.0%). The British pendulum and sand patch test methods were used to evaluate the frictional/skid resistance and surface texture properties of these mixtures, respectively. OGFC mixtures showed better frictional characteristics compared to BC and SMA mixes. Texture depth played an important role in the development of friction, especially during the presence of water over the mix surface. Furthermore, the presence of a water film had a detrimental impact on frictional efficiency, i.e., higher water depth resulted in lower frictional resistance. Surface texture for different types of asphalt mixes (BC, SMA, and OGFC) had a fairly good correlation with skid resistance under both dry and wet conditions.
Effect of Nominal Maximum Aggregate Size and Bitumen Content on Frictional Properties of Different Bituminous Surface Courses
Lecture Notes in Civil Engineering
Rastogi, Rajat (Herausgeber:in) / Bharath, G. (Herausgeber:in) / Singh, Dharamveer (Herausgeber:in) / Choudhary, Rajan (Autor:in) / Kumar, Rajneesh (Autor:in) / Kumar, Ankush (Autor:in) / Pathak, Santanu (Autor:in) / Kumar, Abhinay (Autor:in)
International Conference on Transportation Infrastructure Projects : Conception to Execution ; 2022 ; Haridwar, India
22.07.2023
16 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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