CP Road MAP Brief 13-1, August 2010

Describing promising technologies that can be used now to enhance concrete paving practices

Bonding Agents for Portland Cement Concrete and Mortar, August 1983

Structural repairs of bridges piers and abutments require patching concrete or mortar be placed at various thickness. Whether concrete or mortar is use depends upon the depth of the patch to be made. In some instances, the use of a liquid bonding agent has been specified in the mixes as well as in a grout scrubbed onto the surface to be patched prior to the mix placement. Most of the bonding agents presently approved by the Iowa D.O.T. are polyvinyl acetate (PVA) or some type of latex. In a general discussion with a consultant about various types of bridge repair materials and processes, the subject of bonding agents was discussed at some length. It was the opinion of the consultant that the usage of polyvinyl acetates should be discontinued because of possible deterioration of this material with time. Some of these materials apparently re-emulsify in a high - moisture environment causing serious patch deterioration. As a result of this information, a study was initiated to determine the durability of these materials.

Evaluation of Fly Ash in lean Portland Cement Concrete Base "Econocrete", August 1986

Fly ash was used in this evaluation study to replace 30, 50 and 70 percent of the 400 1bs. of cement currently used in each cu. yd. of portland cement econocrete base paving mix. Two Class "c" ashes and one Class "F" ash from Iowa approved sources were examined in each mix. When Class "c" ashes were used, they were substituted on the basis of 1.0 pound for each pound of cement removed. When Class "F" ash was used, it was substituted on the basis of 1.25 pounds of ash for each pound of cement removed. Compressive strengths with and without fly ash were determined at 7, 28 and 56 days of age. In most cases, strengths were adequate. The freeze/thaw durability of the econocrete mixes studied was not adversely affected by the presence of fly ash. The tests along with erodibility and absorption tests have demonstrated the feasibility of producing econocrete with satisfactory mechanical properties even when relatively low quality and/or locally available aggregate is being used at no sacrifice to strength and/or durability.

Iowa Workforce News, August 2012, Issue 25

Iowa Workforce Development's bi-monthly newsletter.

Iowa Crop and Weather Report, August 6, 2012, Vol. 12. no. 23

Report produced by the The Department of Agriculture and Land Stewardship, Climatology Bureau. Iowa Secretary of Agriculture Bill Northey today commented on the Iowa Crops and Weather report released by the USDA National Agricultural Statistical Service. The report is released weekly from April through October.

Iowa Agri-News, August 6, 2012, Vol. 12, no. 15

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Iowa Agri-News, August 9, 2012, Vol. 12, no. 16

Crop and livestock summaries for the state of Iowa, produced by the Iowa Department of Agriculture.

Chef Charles Says..., August 2012

The Food Assistance Program provides nutrition assistance to people with low income. Food Assistance can help you buy nutritious foods for a better diet. Produced bye Iowa’s Food Assistance Program, Department of Human Services.

Friday Facts, August 3, 2012, Vol. 149

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.

Heart to Heart, August 2012

Heart to Heart is a publication on new heart disease and stroke information and other related topics by the Department of Public Health.

The Update, August 6, 2012

The Update is a bi-weekly web newsletter published by the Iowa Department of Public Health's Bureau of Family Health. It is posted the second and fourth week of every month, and provides useful job resource information for departmental health care professionals, information on training opportunities, interdepartmental reports and meetings, and additional information pertinent to health care professionals.

Quick Reads, August 15, 2012

IDPH Quick Reads is an electronic newsletter produced by the Director’s Office at the Iowa Department of Public Health. IDPH Quick Reads are published every three to four weeks.

List of Bid Proposal Holders, August 21, 2012

List of Bid Proposal Holders

Secure and Prepared Newsletter, August 10, 2012, Vol. 8, no. 14

A bi-weekly newsletter for those involved in the fields of homeland security and/or emergency management