Laboratory Investigations of Frost Susceptibility of Aggregates Applied to Road Base Courses
| Autor: | Cezary Kraszewski, Michał Ćwiąkała, Beata Gajewska, Leszek Rafalski |
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| Rok vydání: | 2016 |
| Předmět: |
sand equivalent
unbound mixture 010504 meteorology & atmospheric sciences frost susceptibility 0211 other engineering and technologies Frost heaving 02 engineering and technology Subgrade Plasticity Atterberg limits liquid limit 01 natural sciences Durability aggregate Soil water Environmental science Frost (temperature) Geotechnical engineering frost heave Bearing capacity Road base plasticity index plastic limit 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Transportation Research Procedia. 14:3476-3484 |
| ISSN: | 2352-1465 |
| Popis: | In order to ensure the bearing capacity and durability of road pavements in cold climate areas, it is necessary to use materials which are resistant to harmful frost impact, known as frost heaving. Frost heave cause adverse volume changes, the upwards swelling of a pavement after freezing and deterioration of the bearing capacity of the structure after thawing. In winter, road carriageway temperatures may reach tmin = −30 ˚C under Polish conditions, which results in the freezing of the structural pavement and subgrade layers. Due to frost penetration into the pavement and the subgrade, heaves may form in soils and unbound pavement structural layers. Road bases made of unbound mixtures of continuously graded aggregates may be frost susceptible. Potential frost susceptibility of road materials and soils is determined by laboratory testing. Frost susceptibility is connected directly with the content and quality of fine particles in an aggregates. Frost heave can be predicted on the basis of different properties of soils or aggregates. The article presents the results of laboratory tests of 14 typical natural aggregate road mixtures, continuously graded 0/31.5mm and practically applied to road base courses. Frost susceptibility of the aggregates was determined during laboratory testing of the following properties: content of fine-grain fractions |
| Databáze: | OpenAIRE |
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