Abstract
One of the main reasons for reducing the service life of road asphalt pavements (the appearance and development of damage in the form of ruts, various kinds of plastic deformations, potholes, cracks, etc.) is the low quality of the used oil bitumen. The physicomechanical properties of road bitumen are subject to stricter requirements, especially for organic binders used for the production of crushed stone mastic asphalt (SMA), therefore, in authors’ view, the development of bitumen binders with enhanced physicomechanical properties is one of the key and most urgent tasks in road construction. This problem is solved by introducing various modifiers into the binder. This article presents the results of a study of bitumen modified by introducing technical sulfur into the composition. The effect of binder modification on the physicomechanical properties of road asphalt concrete is shown on the example of crushed stone mastic asphalt (SMA-20) relative to base samples made to control the dynamics of changes in the properties of composites made using sulfur-raising technologies. For a comprehensive assessment of the effectiveness of modifying crushed stone mastic asphalt concrete based on various binders, a generalized quality criterion is calculated, taking into account the calculated particular quality criteria and various values of the weight coefficients. The comparison and analysis of the obtained efficiency criteria is made.
Highlights
Глубина проникания иглы: при 25 °С, 0,1 мм при 0 °С, 0,1 мм Температура размягчения по кольцу и шару (КИШ), °С Растяжимость, см: при 25 °С при 0 °С Температура хрупкости, °С
The physicomechanical properties of road bitumen are subject to stricter requirements, especially for organic binders used for the production of crushed stone mastic asphalt (SMA), in authors’ view, the development of bitumen binders with enhanced physicomechanical properties is one of the key and most urgent tasks in road construction
This article presents the results of a study of bitumen modified by introducing technical sulfur into the composition
Summary
Глубина проникания иглы: при 25 °С, 0,1 мм при 0 °С, 0,1 мм Температура размягчения по кольцу и шару (КИШ), °С Растяжимость, см: при 25 °С при 0 °С Температура хрупкости, °С. Таблица 2 Влияние вида органического вяжущего на физико-механические показатели образцов ЩМА-20
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