Charpy Impact Test Data for Asphalt Mixtures – Ductile-to-Brittle Transition Evaluation

This dataset contains results from Charpy impact tests conducted on asphalt mixture specimens to evaluate whether the material exhibits a ductile-to-brittle transition (DBTT) as temperature decreases. The impact energy absorbed before fracture was quantified and normalized by the specimen cross-sectional area to calculate toughness, enabling direct comparison of fracture resistance across different temperatures and mix samples. The dataset supports research on asphalt performance in cold environments and the applicability of DBTT concepts (commonly studied in metals) to asphalt materials. The DBTT was evaluated by examining the effect of temperature variation on notched bar impact work and analyzing different mixture compositions. Results indicate that, like metals, the energy required to fracture asphalt materials increases with temperature, exhibiting brittle behavior at low temperatures and ductile behavior at high temperatures. A significant change in impact energy absorption was observed within a narrow temperature range, confirming that DBTT is a suitable test for assessing asphalt mixture behavior.

Contents:

Mix Sample / Test ID: Unique identifier for each tested specimen.

Temp (°C): Test temperature.

Wnbi (J): Notched bar impact work (impact energy absorbed).

Dimensions (L, H, h, W, mm): Geometrical measurements of specimens.

A0_mm2 (mm²): Cross-sectional area of the notched specimen.

Snbi (J/mm²): Normalized impact toughness, calculated as energy divided by cross-sectional area.

Key Use:

Identifying the ductile-to-brittle transition temperature (DBTT) in asphalt mixtures.

Comparing fracture energy across mixtures and temperatures.

Supporting material selection for cold climates.

File format: Excel (.xlsx), multiple sheets with results from different test series.