EVACES15, Dbendorf (Zurich), Switzerland, October 19-21, 2015 Investigation of temperature dependent stiffness variation of a layer of asphalt and their possible effect on the deformation behaviour of concrete structures Dolgion Erdenebat M.Eng. Prof. Dr.-Ing. Danile Waldmann Laboratory of Solid Structures University of Luxembourg 1/14 EVACES15, Dbendorf (Zrich), Switzerland, October 19-21, 2015 Index : 1.Introduction 2.Experimental setup 3.Test results 4.Summary and outlook 2/14 EVACES15, Dbendorf (Zrich), Switzerland, October 19-21, 2015 Introduction : 3/14 EVACES15, Dbendorf (Zrich), Switzerland, October 19-21, 2015 Mastic asphalt Concrete girder Introduction : Composite effect? Elastic-Modulus TemperatureConcreteAsphalt [C][N/mm] /14 EVACES15, Dbendorf (Zrich), Switzerland, October 19-21, 2015 Experimental setup: Side view and measurement equipment Cross-section 5/14 EVACES15, Dbendorf (Zrich), Switzerland, October 19-21, 2015 Experimental setup: Gradually load tests in the climatic chamber 6/14 EVACES15, Dbendorf (Zrich), Switzerland, October 19-21, 2015 Test results: Climatic StepK-1K-2K-3K-4K-5K-6K-7K-8 Temperature [C] /14 EVACES15, Dbendorf (Zrich), Switzerland, October 19-21, 2015 Test results: Temperature[C] Influence of asphalt[%] without asphalt with asphalt Deformation W2 [mm] Load [kN] 8/14 EVACES15, Dbendorf (Zrich), Switzerland, October 19-21, 2015 Test results: Composite effect ? 9/14 EVACES15, Dbendorf (Zrich), Switzerland, October 19-21, 2015 Test results: Composite effect 10/14 EVACES15, Dbendorf (Zrich), Switzerland, October 19-21, 2015 Test results: Calculated from W-2 Composite effect 11/14 EVACES15, Dbendorf (Zrich), Switzerland, October 19-21, 2015 Test results: Calculated from W-2 Variation of composite effect Temperature [C] Composite effect 24,5%17,0%41,0% 12/14 EVACES15, Dbendorf (Zrich), Switzerland, October 19-21, 2015 Summary and outlook: Asphalt layer has a temperature influence on the structural behaviour Asphalt increases the rigidity of total system in dependence of temperature Composite effect between asphalt and concrete is also temperature dependent For load tests the influencing factors of asphalt have to be considered 13/14 EVACES15, Dbendorf (Zrich), Switzerland, October 19-21, /14 EVACES15, Dbendorf (Zrich), Switzerland, October 19-21, 2015 Bending stiffnessBridge in Moestroff Bridge in Useldange Bridge Champangshiehl Slabs for climatic chamber tests EI without asphalt (for T= 20C) [(MN/m)*m 4 ] ,3 EI with asphalt (for T= -10C) [(MN/m)*m 4 ] ,0 EI with asphalt (for T= 20C) [(MN/m)*m 4 ] ,0 EI with Asphalt (for T= 40C) [(MN/m)*m 4 ] ,7 Bending stiffnessBridge in Moestroff Bridge in Useldange Bridge Champangshiehl Slabs for climatic chamber tests EI without asphalt (for T= 20C) [%]---- EI with asphalt (for T= -10C) [%]19%73%8%277% EI with asphalt (for T= 20C) [%]3%17%2%70% EI with Asphalt (for T= 40C) [%]0,3%2%0,1%8%