Anleggsvirksomhet

This document describes a test method for measuring a quantity representative of the intrinsic characteristics of airborne sound insulation for traffic noise reducing devices: the sound insulation index. The test method is intended for the following applications: - determination of the intrinsic characteristics of airborne sound insulation of noise reducing devices to be installed along roads, to be measured either in situ or in laboratory conditions; - determination of the in situ intrinsic characteristics of airborne sound insulation of noise reducing devices in actual use; - comparison of design specifications with actual performance data after the completion of the construction work; - verification of the long term performance of noise reducing devices (with a repeated application of the method); - interactive design process of new products, including the formulation of installation manuals. The test method is not intended for the determination of the intrinsic characteristics of airborne sound insulation of noise reducing devices to be installed in reverberant conditions, e.g. inside tunnels or deep trenches or under covers. Results are expressed as a function of frequency in one-third octave bands, where possible, between 100 Hz and 5 kHz. If it is not possible to get valid measurement results over the whole frequency range indicated, the results will be given in a restricted frequency range and the reasons for the restriction(s) will be clearly reported.

This European Standard specifies test methods for determining the bond strength between an asphalt layer and other newly constructed construction layers or existing substrates in road or airfield pavements. The tests can also be applied on laboratory prepared interlayers. Further informative test methods are defined for evaluating the complex bond stiffness between road construction layers. The normative tests described in this standard are - Torque Bond Test (TBT), generally applicable to any layer thicknesses - Shear Bond Test (SBT), generally applicable to layer thicknesses ≥ 15 mm - Tensile Adhesion Test (TAT), generally applicable to layer thicknesses < 15 mm NOTE 1: Further non normative test methods are described in informative annexes: - Annex A (informative) - Compressed shear bond test (CSBT) - Annex B (informative) - Cyclic compressed shear bond test (CCSBT) - Annex C (informative) - Alternative Shear bond test (ASBT) - Annex D (informative) - Layer Adhesion Measuring Instrument (LAMI)