Friday Facts, October 7, 2011, Vol. 116

Bureau of Nutrition and Health Promotion part of the Iowa Department of Public Health produces of weekly newsletter about the Iowa WIC Program for the State of Iowa citizen.

Relationship of Carbonate Aggregates to Concrete Aging, HR-116, 1967

HR-116 is concerned with the relationship of carbonate aggregate to aging of highway concrete. The ultimate purpose of the research is to provide the Materials Department with better criteria for selection of carbonate aggregates for use in highway concrete. The research stems from the problem in Iowa which relates durability of highway concrete to use of certain aggregates. Service records of certain highways have shown that concrete deterioration is related to the source of coarse carbonate aggregate. Research on this problem in projects HR-15 and HR-86 helped define three broad areas of the problem in more detail: 1. The problem of evaluation of rocks which pass current specifications but have poor service records 2. The basic problem of how rocks contribute to distress in concrete 3. The problem of how concrete ages or weathers.

Iowa Educational Directory, 2003

Annual directory of PreK-12, area education agencies, universities, colleges, and the Iowa Department of Education

Iowa Department of Transportation Major Items - Preliminary Quantity Report, August 20, 2013; With Addendums

Weekly letting report.

Iowa Department of Transportation Major Items - Preliminary Quantity Report, December 17, 2013; With Addendums

Weekly letting report.

Iowa Department of Transportation Major Items - Preliminary Quantity Report, March 18, 2014; With Addendums

Weekly letting report.