Early Strengths of Class F, C, and B Portland Cement Concrete, MLR-87-07, 1987

Fast track concrete has proven to be successful in obtaining high early strengths. This benefit does not come without cost. Type III cement and insulation blankets to accelerate the cure add to its expense when compared to conventional paving. This research was intended to determine the increase in time required to obtain opening strength when a fast track mix utilized conventional Type I cement and also used a conventional cure. Standard concrete mixes also were tested to determine the acceleration of strength gain when cured with insulation blankets. The goal was to determine mixes and procedures which would result in a range of opening times. This would allow the most economical design for a particular project and tailor it to that projects time restraint. Three mixes were tested: Class F, Class C, and Class B. Each mix was tested with one section being cured with insulation blankets and another section without. All used Type I cement. Iowa Department of Transportation specifications required 500 psi of flexural strength before a pavement can be opened to traffic. The Class F mix with Type I cement and using insulation blankets reached that strength in approximately 36 hours, the Class C mix using the blankets in approximately 48 hours, and the Class F mix without covers in about 60 hours. (Note: Class F concrete pavement is opened at 400 psi minimum and Class F bonded overlay pavement at 350 psi.) The results showed a significant improvement in early strength gain by the use of insulation blankets. The Type I cement could be used in mixes intended for early opening with sacrifices in time when compared to fast track but are still much sooner than conventional pavement. It appears a range of design alternatives is possible using Type I cement both with and without insulating blankets.

Asset Management Program Enhancement Plan: Baseline Assessment Phases I and II, 2015

This project resulted in the development of a framework for making asset management decisions on low-volume bridges. The research focused on low-volume bridges located in the agricultural counties of Iowa because recent research has shown that these counties have the greatest percentage of structurally deficient bridges in the nation. Many of the same counties also have the highest crop yields in the state, creating a situation where detours caused by deficient bridges on farm-to-market roads increase the cost to transport the crops. Thus, the research proposed the use of social return on investment (SROI), a tool used by international institutions such as the World Bank, as an asset management metric to gauge to the socioeconomic impact of structurally deficient bridges on the state in an effort to provide quantified justification to fund improvements on low-volume assets such as these rural bridges. The study found that combining SROI with current asset management metrics like average daily traffic (ADT) made it possible to prioritize the bridges in such a way that the limited resources available are allocated in a manner that promotes a more equitable distribution and that directly benefits the user, in this case Iowa farmers. The result is a system that more closely aligns itself with the spirit of MAP-21, in that infrastructure investments are used to facilitate economic growth for Iowa’s agricultural economy.

CIRAS News Annual Report 2000, January 3, 2001

CIRAS professionals, the equipment they use to do their jobs, and the latest in technical support equipment. With these investments, CIRAS continues to meet the needs of Iowa manufacturers, whether in doing routine problem solving, long-range planning, or transferring newer technologies. In all of its services, but most notably in product development projects, one of the strengths of CIRAS lies in bringing ISU students into the picture, both to help reach project goals and as real-job learning experiences for the students.

CIRAS News Annual Report 2001, January 3, 2001

CIRAS professionals, the equipment they use to do their jobs, and the latest in technical support equipment. With these investments, CIRAS continues to meet the needs of Iowa manufacturers, whether in doing routine problem solving, long-range planning, or transferring newer technologies. In all of its services, but most notably in product development projects, one of the strengths of CIRAS lies in bringing ISU students into the picture, both to help reach project goals and as real-job learning experiences for the students.

CIRAS News Annual Report 2002, January 3, 2001

CIRAS professionals, the equipment they use to do their jobs, and the latest in technical support equipment. With these investments, CIRAS continues to meet the needs of Iowa manufacturers, whether in doing routine problem solving, long-range planning, or transferring newer technologies. In all of its services, but most notably in product development projects, one of the strengths of CIRAS lies in bringing ISU students into the picture, both to help reach project goals and as real-job learning experiences for the students.

CIRAS News Annual Report 2003, January 5, 2004

CIRAS professionals, the equipment they use to do their jobs, and the latest in technical support equipment. With these investments, CIRAS continues to meet the needs of Iowa manufacturers, whether in doing routine problem solving, long-range planning, or transferring newer technologies. In all of its services, but most notably in product development projects, one of the strengths of CIRAS lies in bringing ISU students into the picture, both to help reach project goals and as real-job learning experiences for the students.

CIRAS News Annual Report 2004, November 29, 2004

CIRAS professionals, the equipment they use to do their jobs, and the latest in technical support equipment. With these investments, CIRAS continues to meet the needs of Iowa manufacturers, whether in doing routine problem solving, long-range planning, or transferring newer technologies. In all of its services, but most notably in product development projects, one of the strengths of CIRAS lies in bringing ISU students into the picture, both to help reach project goals and as real-job learning experiences for the students.

CIRAS News Annual Report 2005, October 21, 2005

CIRAS professionals, the equipment they use to do their jobs, and the latest in technical support equipment. With these investments, CIRAS continues to meet the needs of Iowa manufacturers, whether in doing routine problem solving, long-range planning, or transferring newer technologies. In all of its services, but most notably in product development projects, one of the strengths of CIRAS lies in bringing ISU students into the picture, both to help reach project goals and as real-job learning experiences for the students.

CIRAS News Annual Report 2006, September 4, 2007

CIRAS professionals, the equipment they use to do their jobs, and the latest in technical support equipment. With these investments, CIRAS continues to meet the needs of Iowa manufacturers, whether in doing routine problem solving, long-range planning, or transferring newer technologies. In all of its services, but most notably in product development projects, one of the strengths of CIRAS lies in bringing ISU students into the picture, both to help reach project goals and as real-job learning experiences for the students.

Iowa In Motion: State Transportation Plan, 1997

What is Iowa in Motion? The Iowa Department of Transportation is continuing the journey to develop Iowa’s future transportation system. This ongoing planning process, known as Iowa in Motion, was developed in response to the Intermodal Surface Transportation Efficiency Act (ISTEA) and Iowa’s changing transportation needs. The completion of Parts I, II and III of Iowa in Motion has led to development of this State Transportation Plan. Part IV includes activities, both current and future, to support the plan. This State Transportation Plan represents the thoughts and concerns of thousands of Iowans. Individuals, metropolitan planning organizations (MPOs), regional planning affiliations (RPAs), associations and organizations have become involved and have made recommendations concerning which direction should be followed regarding transportation investments. This plan represents their extensive input into the Iowa in Motion process and consensus building as we moved towards adoption of this State Transportation Plan. The adopted plan serves as a guide for development of transportation policies, goals, objectives, initiatives and investment decisions through the year 2020.

06033-015 Fox River Watershed Final Report

With WIRB funding the Fox River Ecosystem Development board will install prioritized practices identified by assessments within the impaired segment of Fox River that currently will not be funded by Iowa Section 319 or Watershed Protection Funds. The FRED board is also asking for funding for a three year position for continuing assessment, planning, and technical assistance. Through various funding sources local work groups have been able to address some of the critical and high priority areas. But, as further assessments are made, commitment, and need expressed from landowners grow, the FRED board and SWCD districts in both Iowa and Missouri are committed not only to seek funding to continue water quality efforts for more practices but also enhance and protect existing practices and investments that protect our water quality and economic viability in both states.

06004-003 Big Sioux River Watershed Final Report

Controlling and managing manure-contaminated runoff is a responsibility of every livestock producer. The minimum requirement of all confined feeding operations in Iowa, regardless of size, is to settle solids. Two separate watershed assessments conducted in 2003-2004 by the Lyon SWCD of 141 feedlot sites indicated only 29% have solid settling basins in place. Regulating agencies generally recommend a holding pond followed by irrigation land application which require large capital investments, specialized machinery and additional management skill sets. Producers are looking for more cost-effective alternatives for controlling feedlot runoff and regulating agencies need to know these alternatives will protect the environment.

09020-012 Fox River Watershed Final Report

With WIRB funding the Fox River Ecosystem Development board will continue to install prioritized practices identified by assessments within the impaired segment of Fox River. The FRED board is also asking to continue funding for a new 5 year position for assessment, planning and technical assistance. With new assessments and water quality monitoring already being done on the impaired segment of the Fox River a lot of valuable information is at hand. Ecosystem Development board is requesting funding from WIRB to install grade stabilization structures, water sediment basins, and terraces to reduce sediment delivery to Fox River. The FRED board in both Iowa and Missouri are committed not only to seek funding to continue water quality efforts for more practices but also to enhance and protect existing practices and investments that protect our water quality and economic viability in both states. We are off to a good start and want to continue our progress on the Fox River.