The following tests are conducted to assess the suitability or quality of bitumen for specific use as a paving material and also for read making: 1. Specific Gravity: Specific gravity of a binder material does not affect its bonding characteristics. However, its value is needed in bituminous mix design. This is determined at 27°C using a standard pyknometer. The bitumen [...]
The following tests are conducted on tar to check or assess its suitability or quality for specific uses in road construction: 1. Specific Gravity: For determining the specific gravity of tar, the same procedure as for bitumen using a pyknometer is applicable. 2. Distillates: A distillation flask of about one litre capacity is filled with a weighed quantity of tar [...]
In this article we will discuss about how to design bituminous mixes for construction of roads [with mix formula]| . Design of Bituminous Mixes: The steps in the design of bituminous mixes are: Selection of Aggregate and Grading: Aggregates which possess the desired qualities of strength, hardness, toughness, and soundness are selected. Crushed stone aggregates and sands of angular particles [...]