Pervious Concrete Chemical Degradation by Calcium Chloride Deicer
Publication: Journal of Cold Regions Engineering
Volume 35, Issue 1
Abstract
The pervious concrete layer in a permeable pavement system may be susceptible to chemical degradation by various deicers applied during winter weather events. In this research, the chemical impacts of calcium chloride on pervious concrete specimens made in the laboratory were studied and compared with specimens with a water-only control. The 20 specimens were made with limestone aggregate and ordinary Portland cement (OPC) and were similar in porosity. Either 200 mL of deicer at a 3% mass concentration or 200 mL of water were poured onto the top of the 100 mm diameter specimens once weekly for 17 weeks and allowed to partially air dry in the laboratory in between applications. Debris started to fall from the bottoms of the specimens with the calcium chloride applications about halfway into the testing period. Unconfined compressive strength tests performed after the deicer applications were completed show a substantial decrease in strength for the specimens that received the calcium chloride applications. It is recommended that calcium chloride deicers not be used on pervious concrete made with limestone aggregate and OPC.
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Acknowledgments
The authors are grateful for support from the USDOT Tier I University Transportation Center, the Center for Environmentally Sustainable Transportation in Cold Climates (CESTiCC), Evolution Paving, and material donations from Holcim and Martin Marietta. We also thank undergraduate students Burgandy Petri and Christopher Huddleston at Lamar University for their help in the laboratory.
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Information & Authors
Information
Published In
Journal of Cold Regions Engineering
Volume 35 • Issue 1 • March 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Jan 8, 2019
Accepted: Aug 7, 2020
Published online: Nov 4, 2020
Published in print: Mar 1, 2021
Discussion open until: Apr 4, 2021
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