Stratco inc. Asphalt modification

Asphalt Modification

Asphalt / Bitumen Modification Process

blending equipment for the modified asphalt/bitumen industry

The majority of modified asphalt/bitumen manufacturers are using different asphalt/bitumen formulations to satisfy various requirements.

STRATCO’S INVOLVEMENT IN THE MODIFIED ASPHALT/BITUMEN INDUSTRY

STRATCO is specifically involved in providing, which can be integrated into any system configuration to impove product quality and the time consuming curing process.

The STRATCO® Modified Asphalt Contactor™ reactor (MAC) was designed to disperse high concentrations of various polymers and polymer blends in high viscosity fluids.

Process Advantage

The MAC reduces energy costs because of its heat transfer effectiveness.

The STRATCO® Modified Asphalt Contactor™ (MAC) reactor improves and the asphalt modification manufacturing process in several key ways.

The unit’s superior design allows manufacturers to increase throughput maximizing production by controlling & maintaining the modified binder temperature.

The MAC provides better dispersion of higher concentrations of various polymers than conventional equipment . This is the key in reducing process time and costs.

Polymer modification in all forms can be achieved by incorporating a colloid mill into the MAC production process, including elastomers (e.g. SBS) and plastomers (e.g. APP):

Modified Asphalt Contactor Reactor

The asphalt / bitumen-polymer blend is pulled down through the inside of the circulation tube via the impeller.

The STRATCO® Modified Asphalt Contactor™ (MAC) reactor is designed to blend modifiers with asphalt cement / bitumen to produce modified asphalt for the paving, bitumastic roofing or building industrial applications. It also functions as a booster heater to raise the temperature of the binder.

The high dispersion mixing in the MAC is achieved using the hydraulic head assembly, in conjunction with the unique internal vessel configuration, forcing the entire contents through multiple turnover cycles every minute.

Intense mixing capability enhances quality of products, through homogenous mixture and tight temperature control.

Turbulence is established between the stationary shear vanes and the blades of the impeller, resulting in a zone of high shear and intense mixing.

As the material passes through the impeller, its velocity is greatly increased. At the discharge side of the impeller, the stream is impinged against the diffuser vanes. The direction of the flow is reversed at the bottom of the hydraulic head where the vanes force an axial turbulent flow as the dispersion/emulsion passes through the annular space formed by the circulation tube and vessel wall. The liquid then flows over the top of the circulation tube and back into the impeller.

Heat transfer oil is circulated in the external heating jacket. High heat transfer coefficients are achieved by the high fluid velocities across the heating surface.