Ultra-Thin Portland Cement Concrete Overlay Extended Evaluation, January 2005

In this day of the mature highway systems, a new set of problems is facing the highway engineer. The existing infrastructure has aged to or past the design life of the original pavement design. In many cases, increased commercial traffic is creating the need for additional load carrying capacity, causing state highway engineers to consider new alternatives for rehabilitation of existing surfaces. Alternative surface materials, thicknesses, and methods of installation must be identified to meet the needs of individual pavements and budgets. With overlays being one of the most frequently used rehabilitation alternatives, it is important to learn more about the limitations and potential performance of thin bonded portland cement overlays and subsequent rehabilitation. The Iowa ultra-thin project demonstrated the application of thin portland cement concrete overlays as a rehabilitation technique. It combined the variables of base preparation, overlay thickness, slab size, and fiber enhancement into a series of test sections over a 7.2-mile length. This report identifies the performance of the overlays in terms of deflection reduction, reduced cracking, and improved bonding between the portland cement concrete (PCC) and asphalt cement concrete (ACC) base layers. The original research project was designed to evaluate the variables over a 5-year period of time. A second project provided the opportunity to test overlay rehabilitation techniques and continue measurement of the original overlay performance for 5 additional years. All performance indicators identified exceptional performance over the 10-year evaluation period for each of the variable combinations considered. The report summarizes the research methods, results, and identifies future research ideas to aid the pavement overlay designer in the successful implementation of ultra-thin portland cement concrete overlays as an lternative pavement rehabilitation technique.

Annual Report of the Iowa Grape and Wine Development Commission for Fiscal Year, 2007

FY2007 was a productive year for the Iowa Grape and Wine Development Commission. Fourteen proposals were recommended for funding totaling over $390,000 in outlays. Included in the approved proposals were funds for the establishment and staffing of a Midwest Grape and Wine Institute at Iowa State University, a newly created viticulturist position at Des Moines Area Community College, funding for the first annual Mid-American Wine Competition, and marketing and promotion of four regional cooperative wine events and one wine trail. Commission funding supported a survey of commercial wine producers and grape growers and a new brochure on Iowa’s vineyards. A committee was formed to provide details for a Scholarship Program to aid vineyard and winery staff with the expenses of accredited coursework. Based on the survey conducted and from other governmental and industry sources, the Iowa grape and wine industry appears to continue to be very viable and growth continues at a strong pace. Wine produced in the state for 2007 was estimated at a market value in excess of $12.3 million. A tabulation of the budget revealed that just over $800,000 in wine gallonage tax appropriations have been received into the Grape and Wine Development Fund from 15 FY2003 through FY2007. Expenditures have totaled just over $607,000 during that same time. Just over 80% of expenditures have gone to “Technical” spending. Over time, funds invested in “Technical” programs will translate into an increasingly educated and institutionally-supported industry. Local, regional, and statewide events also appear to be increasing in popularity and the Commission plans to continue and increase support for these events. It is hoped the Scholarship Program will be up and running and funding will need to be appropriated for that project. The Commission also believes many projects and events will become more and more self sustaining as they develop and mature. As they continue to support Iowa’s grape and wine industry, the members of the Commission look forward to working with individuals, commercial enterprises, state and federal agencies, and industry-sponsored institutions in the upcoming year and in years to come.