European Committee for Standardization

Bituminous mixtures - Test methods for hot mix asphalt - Part 40: In situ drainability
 N EN 12697-40

Annotation

This European Standard describes a method to determine the in-situ relative hydraulic conductivity, at specific locations, of a road surfacing that is designed to be permeable. An estimate of the average value for the surfacing is obtained from the mean value of a number of determinations on each section of road.

The test measures the ability to drain water (drainability) achieved in-situ of a surfacing. As such, it can be used as a compliance check to ensure that a permeable surface course has the required properties when it is laid. The test can also be used subsequently to establish the change of drainage ability with time.

For the test to be valid, the surface of the test area should be clean and free from detritus. Measurements can be made when a road is either wet or dry, but not if it is in a frozen state.

Автоматический перевод:

Битумные смеси - Методы тестирования для асфальта горячей смеси - Часть 40: осушаемость На месте

Этот европейский стандарт описывает метод для определения относительной гидравлической проводимости на месте, в определенных расположениях, дорожной одежды, разработанной, чтобы быть проницаемой. Оценка среднего значения для обработки поверхности получена из средней величины многих определений на каждой части дороги.