Salt River increases blending capacity for performance Class F ash substitute

Phoenix-based 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.

New blending equipment and expanded loadout capabilities usher SRMG’s Tucson Pozzolan into the southern Arizona market.

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 plus 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.

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UTAH ASH CONTRACT: 250K-TON NET GAIN

Salt River Materials Group and electricity operator PacifiCorp have entered a Fly Ash Marketing Agreement covering Rocky Mountain Power’s Huntington plant in Utah, located about 150 miles southeast of Salt Lake City. It provides exclusive rights to process and sell the facility’s ASTM C618 Class F fly ash, and becomes the ninth such agreement in an SRMG management and marketing portfolio spanning Utah, Arizona and New Mexico coal-fired generating stations.

Huntington output will add to the 17 million tons of fly ash SRMG has finished and shipped for beneficial use since 1973. By investing significant capital to install new beneficiating equipment, the producer will have the capacity to process 100 percent of the station’s fly ash—processing presently nonmarketed material into consistent, high‐quality binder available to meet concrete market needs. Scheduled to go on‐line in spring 2021, the Huntington operation stands to yield an additional 250,000 tons of fly ash that otherwise is absent from the current Intermountain and Southwest state supply chain. Initial marketing will focus on fly ash customers in Utah, southern Nevada, and Idaho.