Be sure to consult TXI ES&C, preferably during the conceptual design phase of your project, for precise information on aggregate grading, bulk density (unit weight), in-place compacted density, friction angle, thermal conductivity, and placement method. TXI ES&C offers the ability to provide a variety of grading options to suit your particular needs. Use this versatility to specify the optimum material for any given application. As with ordinary aggregates, the engineering properties of ES&C vary depending on aggregate sources and grading.