The subgrade is a crucial part of the pavement structure, as it transmits the load of vehicles on the pavement to the subsoil. The stability of the pavement depends on the stability characteristics of the subgrade. Roadwork waste materials (RWM) constitute a significant portion of waste materials used for roadway construction, particularly in base fill and backfill layers. Due to the shortage of virgin raw aggregates from quarries, alternative materials, such as RWM, are used as replacements in regular roadway construction. This research conducted a wide range of laboratory and field evaluations to determine the engineering properties of pond ash (PA) and reclaimed asphalt pavement (RAP), focusing on bottom ash as a blended material. Geotechnical parameters, such as particle size and mechanical properties of the materials, were assessed to evaluate their performance in pavement base or sub-base applications. The interaction of integrity between pond ash, RAP, and natural backfill as homogeneous materials was assessed by examining consistency characteristics concerning optimum moisture content (OMC) and maximum dry density (MDD). Six proportions of pond ash, RAP, and backfill soil (PA, RAP, NBS) were identified and used, with the optimal proportion being 50%:30%:20%. The grain size of RAP required for soil testing suitability will be obtained by disintegration using an earth hammering machine.
W artykule przedstawiono koncepcję procedury walidacji metod rozpoznania podłoża gruntowego na potrzeby budownictwa drogowego. Walidacja metod badawczych jest jednym z elementów projektu nowej instrukcji badań podłoża gruntowego. Po dokonaniu przeglądu metod stwierdzono, że w zależności od doświadczeń w ich dotychczasowych zastosowaniach walidacja może zostać przeprowadzona na podstawie danych literaturowych, archiwalnych wyników badań lub dodatkowych badań wykonanych na poligonach testowych.
EN
The paper presents concept of validation method of sub-grade investigation in road engineering. Validation of test method is an element of new draft instruction of sub-grade investigation. After reviewing of the methods there has been stated that validation may be done on the base of literature data, archive results of investigations, or additional investigations made at test sides.
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.