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Research Solutions: Using Waste Ash as a Substitute in Concrete, TR-807, 2025
No full textBy 2019, Iowa was the 16th in the nation in coal power generation, with 72 operating coal‐fired power units totaling 6,492 megawatts(MW). Presently, each of the power plantstill producessignificant amount of waste ashes, most of which have been deposited in landfills because they do not meet specifications for construction and other applications. The landfills pose serious risks for the surrounding environment, e. g., leaching of chemicals into ground and surface waters. Recently, research has shown that many of these power plant waste ashes are rich in silicate and/or calcium, and they could react with carbon dioxide (CO2) in atmosphere to produce calcium carbonate (CaCO3), thus altering the properties of these ashes. Based on this concept, the proposed study is to inject captured CO2 into selected Iowa power plant waste ashes (coal and RDF ashes, fly ash and bottom ashes) to treat or cure the waste ashes, change their properties (e.g., surface chemistry, morphology, and pore structure), and enable them to be beneficially used in concrete. The main tasks of the study will include (1) to optimize carbon curing procedure (pressure, moisture, and time) for the selected waste ashes, (2) to determine the effects of carbon curing on properties (the surface chemistry, morphology, pore structure, etc.) of the ashes, (3) to learn about the effects of carbon cured ashes on the properties (set time, flowability, hydration, strength etc.) of cement composites (e. g., paste and mortar), and (4) to investigate how much CO2 can be consumed by or sequestrated in the waste ashes, and (5) to assess the potential benefit‐to‐cost ratio of the carbon curing treatment for the waste ashes. It is expected that this study can generate profound environmental, economic, and social impacts as overabundant waste ashes in Iowa are extensively and beneficially used
Report on the Iowa State Fair Authority for the year ended October 31, 2024
No full textReport on the Iowa State Fair Authority for the year ended October 31, 202
Monday Morning Eye Opener, October 13th, 2025
No full textWeekly Newsletter from the Northwest District Office for libraries containing programs, activities, classes for the upcoming week
Agreed-upon procedures report on the City of Farley, Iowa for the period July 1, 2023 through June 30, 2024
No full textAgreed-upon procedures report on the City of Farley, Iowa for the period July 1, 2023 through June 30, 202
Iowa Respiratory Virus Surveillance Report: Week 40, October 10, 2025
No full textThe Iowa Influenza Surveillance Network (IISN) was established in 2004, though surveillance has been conducted at the Iowa Department of Public Health. Schools and long-term care facilities report data weekly into a Web-based reporting system. Schools report the number of students absent due to illness and the total enrolled. Long-term care facilities report cases of influenza and vaccination status of each case. Both passively report outbreaks of illness, including influenza, to IDPH. Beginning April of 2023, the report began to include COVID-19 information
Hot Mix Asphalt Level II, Instruction Manual, Training Training and Certification Program, 2024-2025
No full textThe purpose of the Technical Training & Certification Program is to ensure Quality Control (QC)/Quality Assurance (QA) and Acceptance of Aggregates, Hot Mix Asphalt (HMA), Portland Cement Concrete (PCC), Soils, Erosion Control, Precast and Prestressed Concrete, and Pavement Profiles and to ensure proper documentation of quality control/quality assurance and acceptance procedures and test results by industry and Contracting Authority personnel. This Instructional Memorandum (IM) explains the requirements to become certified and to remain certified to perform inspection and testing in the State of Iowa. This IM also describes the duties, responsibilities and the authority of persons assigned the position of Certified Technician in any
of the above areas for construction or maintenance projects
Agreed-upon procedures report on the City of Alleman, Iowa for the period April 1, 2024 through March 31, 2025
No full textAgreed-upon procedures report on the City of Alleman, Iowa for the period April 1, 2024 through March 31, 202
Report on the Northeast Iowa Local Workforce Development Area for the year ended June 30, 2022
No full textReport on the Northeast Iowa Local Workforce Development Area for the year ended June 30, 202
2024 BRFSS Survey Findings Brief, October 2025
No full textThis report covers the findings of the 2024 Behavioral Risk Factor Surveillance System survey
Agricultural Policy Review, Fall 2025
No full textAgricultural Policy Review is a quarterly newsletter published by the Center for Agricultural and Rural Development (CARD). This publication presents summarized results that emphasize the implications of ongoing agricultural policy analysis of the near-term agricultural situation, and discussion of agricultural policies currently under consideration