This invention encompasses rubber modified asphalt cement compositions, as well as systems, apparatuses, methods for preparing, as well as methods for using rubber-modified asphalt cement compositions.

This invention encompasses systems, methods, and apparatuses for low temperature preparation of rubber modified asphalt cement as well as resulting compositions.

The subject invention provides a portable warm asphalt preparation apparatus and a process for the production of warm asphalt. In addition to a source of granular plastic and a source of mineral aggregate that, together form an asphalt feed material, the apparatus comprises a first receptacle having an inlet for introducing the asphalt feed material into a chamber, a floor at an inclined plane, and an outlet for discharging asphalt from the chamber. A source of heat supplies heat to the asphalt feed material. The apparatus also has a conveyer for mixing the asphalt feed material and transporting a resultant warm mixture towards the outlet. The apparatus further comprises a temperature sensor for measuring the temperature within the chamber, and a controller that activates or deactivates the heater based on input from the temperature sensor.

Provided herein are methods, apparatus, and systems for delivering carbon dioxide as a mixture of solid and gaseous carbon dioxide to a destination. In particular, provided herein are kits for retrofitting a concrete operation to supply gaseous and solid carbon dioxide to concrete in the operation, where the kit includes a conduit to connect to a source of liquid carbon dioxide and to a carbon dioxide injector, the carbon dioxide injector, a second conduit to connect with the carbon dioxide injector, a third conduit to connect with the second conduit, and an intermediate processing unit.