POLYMER MODIFIED ASPHALT

Polymer-modified asphalt (PMA) is produced through the addition of a polymer (and usually several other chemical components in smaller amounts) to liquid hot base asphalt. The purpose of producing PMA is to provide asphalt that meets the new Superpave requirements, with added strength and flexibility at a wider temperature range than non-modified asphalt.

Chemex has extensive expertise in PMA blending for a wide variety of applications. Chemex's design flexibility will reflect your company's needs regarding key design parameters such as capacity, level of automation, equipment preferences, and material handling to ensure complete customer satisfaction.

Chemex's process utilizes proprietary technology and the most recent developments in formulation and equipment configuration. The Chemex design can be highly automated to allow blending of a wide variety of polymers into a wide variety of asphalt basestocks. Chemex's process has the flexibility to minimize modifier and operating costs while maximizing product value.

Chemex PMA system advantages are as follows:

• Proprietary Design - Chemex's formulation technology and mechanical design provide the highest flexibility and efficiency available by minimizing the quantity of polymer and/or additives required to meet specification requirements.
• Flexibility – Chemex's equipment configuration allows for a PMA plant capable of blending up to 15% of polymer concentrates into a wide variety of asphalt basestocks, with operating viscosities of up to 8,000 centistokes.
• Chemex equipment can be designed to process from 250 to 1400 tons per day of PMA, while heating the asphalt to the required mix temperature.
• Automated Process - The Chemex design controls the polymer addition rate automatically, maintaining the desired polymer concentration based on the asphalt flow rate into the mixing tank. Chemex's automated process provides improved metering and regulation versus manual versions.
• Thorough Polymer Dispersion - Chemex's process incorporates a combination of high temperature, high-shear mixing, and automation that provide a thoroughly dispersed polymer.
• Avoiding Phase Separation - The formulations used by Chemex impede phase separation. Both mechanical and chemical measures are used to provide a stable, homogeneous, blended PMA product. Chemex's proprietary design allows the polymer to "network" within the asphalt, creating a homogeneous mixture.

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Contact us for more information.

Sales & Engineering: 801.565.8099
Fax: 801.565.8129
Address: 542 West 9320 South, Sandy, UT 84070 USA
Email: chemex@chemexllc.com