Sources: Salt River Materials Group, Phoenix; CP staff
Salt River Materials Group has built a powder blending facility and expanded loadout capabilities at its Tucscon Terminal, responding to energy market forces hampering consistent supply of high quality fly ash for Arizona concrete customers. Located within the Tucson Electric Power Sundt Generating Station, the new operation blends ash from multiple sources plus a Type N natural pozzolan for a finished powder meeting ASTM C1697, Standard Specification for Blended Supplementary Cementitious Materials requirements. The material is dubbed “Tucson Pozzolan” and expands supply of a performance Class F fly ash substitute.
The Tucson investment mirrors a 2017 undertaking at the SRMG 19th Avenue Terminal in Phoenix. To prepare for importation of fly ash and natural pozzolan by truck or rail, the producer upgraded existing Tucson Terminal infrastructure. Crews realigned and extended rail tracks and installed a bottom dump rail car unloading system and conveying lines to storage silos. Along with rail and loading improvements, SRMG deployed precision Cyclonaire blending equipment and retrofitted silos to provide safe and dust-free Tucson Pozzolan customer truck loading capability.