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ACPA Home Events Membership Benefits of Membership Application Concrete Pavement Technologies Resources CP Tech Center Blog and News About Mission/Purpose Staff Contact Welcome to the American Concrete Pavement Association The ACPA is a non-profit organization representing the concrete paving industry in South Dakota. The Chapter is recognized by highway officials, engineers, contractors, and paving experts as the state voice for the concrete paving industry. Latest Updates and Chapter News 2024 South Dakota Concrete Conference Registration Now Open Created: Sunday, 17 December 2023 5:24 pm Written by Jason Reaves Use the link below to see details and register for the 2024 South Dakota Concrete Conference on January 30 & 31 at the Lodge at Deadwood Register Here Concrete Overlay History on Iowa’s Roadways Created: Tuesday, 10 April 2018 9:41 pm Written by Jason Reaves As our roadways continue to move towards more of a preservation mode versus new construction or full reconstruction, the concrete pavement industry continues to deliver new research and history on concrete overlays as a preservation method. A long term preservation method. Recently the National Concrete Pavement Technology Center at Iowa State University (CP Tech Center) along with the Iowa Department of Transportation and the Iowa Concrete Paving Association partnered to summarize 1,500 miles of roadway. These concrete overlays have up to 40 years of pavement life to show how overlays on existing pavements can perform to provide a long term preservation to our existing pavements. The entire document can be found here . In summary, the document shows that 93% of overlays ranging from ages of 0-37 years were an average to good rating in the International Roughness Index (IRI) and 89% were in good to excellent condition in the Pavement Condition Index (PCI). These facts and more valuable data can be found in a brief of the entire document on the most recent CP Road Map April 2018 publication. The MAP brief can be found here . I encourage you to read either document and consider a concrete overlay for the next pavement preservation project you have in your highway program. A long term preservation can save your agency a significant amount of money in the long term life of the pavement. Performance Engineered Mixtures (PEM) Created: Thursday, 07 September 2017 1:33 pm Written by Jason Reaves At a recent concrete conference a representative from FHWA made a statement that really hit home on why we should be using Performance Engineered Mixtures (PEM). He stated PEMs are the most significant field-level advancement in 40 years in the concrete pavement industry. That’s an entire career for many. That’s my entire lifetime. The South Dakota Department of Transportation and the South Dakota Chapter of the ACPA have provided funding to be one of the champion states for PEM. We recognize need for a more durable, long-life concrete pavement is necessary in South Dakota as stresses from the freeze-thaw environment and the de-icers that come along with the environment have created the need for the concrete pavement industry to deter these harsh chemicals. As a champion state of PEM, the SDDOT has been using PEM for several years now on many concrete pavement projects with much success. Contractors using the mixes have found them to be a more workable concrete, especially in slip-form paving applications. Some of the highlights of the SDDOT Special Provision for Contractor Furnished Mix Design for PCC Pavement” include: A Quality Control approach allowing the Contractors to be responsible for the performance, production, and composition of their concrete mix designs. A well graded aggregate gradation in the mix design allowing the mix to be more workable with less paste. The inclusion of 20% to 25% fly ash in the minimum 575 lb/cy cementitious content in the mix. Fly ash is proven to mitigate alkali silica reaction (ASR) and deter reactions to deicing chemicals. Establishing a maximum water/cementitious ratio in the mix. Lower w/c ratios provide a less permeable concrete providing another mitigation against deicers. Our concrete pavement specifications have not been keeping pace with advancements in science and innovation within the concrete pavement industry. These mixes bring us into the 21st century in the industry. The link below more thoroughly summarizes PEM and their benefits. If you have any questions regarding implementing these into your concrete pavement project, please contact your local ACPA chapter or the CP Tech Center. PEM MAP brief April 2017 1 2 Next Member Directory Products Services Upcoming Workshop/Events View EventsWe are a non-profit organization representing the concrete paving industry in South Dakota. Our membership includes contractors, materials suppliers, equipment manufacturers, and other firms providing essential services to the concrete paving industry. Our purpose is to improve and extend the use of Portland cement concrete in the construction of pavements and to assist the cement and concrete paving industries in technical, educational, and promotional aspects, ensuring continued successful use of the material with economy to serve the needs throughout South Dakota for pavement construction. Contact ACPA 5024 S. Bur Oak Pl., STE 113A Sioux Falls, SD 57108 Phone: 605.271.3396 Copyright © 2016-2020 ACPA. All...