Evaluating Properties of Blended Cements for Concrete Pavements, December 2003

The addition of supplementary cementitious materials (SCMs), such as fly ash (FA) and slag, generally improves concrete workability, durability, and long-term strength. New trends in sustainable development of concrete infrastructure and in environmental regulations on waste disposal are spurring use of SCMs in concrete. However, use of SCM concrete is sometimes limited due to a lack of understanding about material behaviors and lack of proper specifications for its construction practice. It is believed that SCM concrete performance varies significantly with the source and proportion of the cementitious materials. SCM concrete often displays slower hydration, accompanied by slower setting and lower early-age strength, especially under cold weather conditions. The present research was conducted to have a better understanding of SCM concrete behaviors under different weather conditions. In addition to the study of the effect of SCM content on concrete set time using cementitious materials from different sources/manufacturers, further research may be needed to investigate the effects of SCM combinations on concrete flowability, air stability, cracking resistance, and durability.

Affordable Housing in Iowa: Meeting New Challenges, 2007

Iowa faces a signifi cant challenge over the next decade. In the words of a recent report, “The state faces the danger of worker and skill gaps that could undermine its businesses, erode the earning power of its workers, and slow its economic growth.” (Iowa Works Campaign, 2006) Iowa’s economic and demographic stability depends on attracting new immigrants and slowing the departure of residents. Eroding housing affordability and quality will make this more difficult. Housing alone cannot solve the problem, but it must be part of the solution. This study examines trends in the state’s major housing markets, analyzes the achievements of housing programs in the recent past, and incorporates input from more than 80 housing experts across the state. The second part of this study (included on the attached CD) analyzes housing’s impact on the economy. We developed three major policy recommendations.

Affordable Housing in Iowa: Meeting New Challenges, 2007

Iowa faces a significant challenge over the next decade. In the words of a recent report, “The state faces the danger of worker and skill gaps that could undermine its businesses, erode the earning power of its workers, and slow its economic growth.” (Iowa Works Campaign, 2006) Iowa’s economic and demographic stability depends on attracting new immigrants and slowing the departure of residents. Eroding housing affordability and quality will make this more difficult. Housing alone cannot solve the problem, but it must be part of the solution. This study examines trends in the state’s major housing markets, analyzes the achievements of housing programs in the recent past, and incorporates input from more than 80 housing experts across the state. The second part of this study (included on the attached CD) analyzes housing’s impact on the economy. We developed three major policy recommendations.

Iowa: Education and Workforce Trends through 2025, September 29, 2015

Since the 1980s, education or training beyond high school has become the new minimum threshold for Americans to earn a living wage and attain middle class status. In 1973, only 28 percent of U.S. jobs required education beyond a high school diploma; by 2025, almost two out of three jobs in the nation will require at least some post secondary education or training. Iowa’s economy reflects this national trend and demonstrates a steady increase in the demand for post secondary education and training in the industries that form the mainstay of the national economy.