Mixture Proportioning Considerations for Improved Freeze-Thaw Durability of Pervious Concrete

摘要

Recent U.S. Environmental Protection Agency (EPA) Clean Water Act and Energy and Security Act amendments require stormwater management at private, public, and federal installations. Pervious concrete is a highly permeable material used for stormwater management where detention/retention areas can be placed underneath the pavement for increased site utilization. Although pervious concrete has been successfully utilized in the U.S. for over 40 years, the applications in cold climates only began in earnest around 2006. There still is hesitance to use pervious concrete in cold climates from the perceived lack of freeze-thaw durability. The authors have extensive experience using pervious concrete in cold climates and this paper will discuss the mixture requirements and options for good freeze-thaw performance. Since the freeze-thaw durability of pervious concrete is affected by both the mixture and the installation, a companion paper Installation and Maintenance Considerations for Improved Freeze- Thaw Durability of Pervious Concrete provides a discussion of topics related specifically to installation, construction, and maintenance. The two papers provide a comprehensive discussion of pervious concrete for cold climates.