Twining Inland Empire Lab Tour and Seminar

Caltrans and NDOT have each created polymer-modified asphalt binders that meet PG “plus” specifications that differ in their properties, but is there really a difference between the two? The California Department of Transportation (Caltrans) and the Nevada Department of Transportation (NDOT) use different polymer-modified asphalt binders. Since the implementation of the Superpave performance grade (PG) system, several state highway agencies, including Caltrans and NDOT, have experienced good performance with polymer-modified hot mix asphalt (HMA) mixtures and have created the PG “plus” specifications to enhance the performance of flexible pavement in harsh climates.

We all know about shallow and deep foundations, but how about intermediate foundations? Given poor soil conditions and faced with excessive calculated settlements of planned structures, geotechnical engineers are forced to consider deep foundations or significant overexcavation and recompaction of on-site soil. Both of these options are expensive and are riddled with challenging logistical, environmental, and political issues.

A/E industry jobs are often mentally demanding and require many hours at the grindstone. We are living in a 24/7 business environment. Spreading yourself too thin leads to burnout and deprives you of producing your best work. Consider these strategies for developing a healthy work-life balance and promoting personal happiness.