Bituminous cationic road emulsions are mixtures of bitumen (asphalt) and water, stabilized by emulsifying agents. They are used in road construction and maintenance for applications such as surface treatments, tack coats, and cold-mix patching. These emulsions are categorized based on their properties, primarily determined by the bitumen content and viscosity. Here are the common ranges for bituminous cationic road emulsions:

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1. Bitumen Content: The bitumen content in cationic road emulsions is usually expressed as a percentage of the total emulsion weight.

   • Typically, the bitumen content ranges from 50% to 70% by weight. This means that in a specific emulsion, 50% to 70% of the total weight is bitumen, while the remaining percentage is water and emulsifying agents.

2. Viscosity: Viscosity is an important property that affects the handling, application, and performance of the emulsion.

   • The viscosity of cationic road emulsions can range from low to high, depending on the intended application. Low-viscosity emulsions are used for applications like tack coats and surface treatments, while high-viscosity emulsions are used for cold mix applications.

3. Setting Time: The setting time refers to the time it takes for the water in the emulsion to evaporate, leaving behind a stable bitumen film.

   • The setting time can vary based on the type of emulsifying agents used, temperature, and other factors. Generally, setting times range from a few minutes to several hours.

4. Aggregate Compatibility: Bituminous emulsions are often used in conjunction with aggregates (such as sand and gravel) for various road construction purposes.

   • The choice of emulsion type (slow-setting, medium-setting, rapid-setting) depends on the type of aggregate and the intended use. Slow-setting emulsions are suitable for fine aggregates, while rapid-setting emulsions are used for coarse aggregates.

It's important to note that the specific ranges for these properties can vary based on the manufacturer, region, and specific project requirements. Different types of cationic emulsions might have slightly different ranges of bitumen content and viscosity to suit various applications and conditions.

For accurate information regarding the ranges of bituminous cationic road emulsions, it's recommended to consult relevant industry standards, specifications, and guidelines provided by local transportation or road construction authorities, as well as information from trusted manufacturers in the field.