New Developments in Chemical Admixtures-An ACI 212 Update-Admixtures for Pervious Concrete (Recorded Presentation)

Video Transcription

Video Summary

The presentation focused on the use and challenges of pervious concrete, primarily used for stormwater control. It compared pervious concrete to a Rice Krispie Treat in terms of appearance and structure, highlighting its role in reducing stormwater runoff in the U.S. The speaker discussed the concrete's composition, emphasizing the need for water to flow freely through the material. Despite its benefits, pervious concrete poses challenges such as being labor-intensive and having a short working time, which are exacerbated by external factors like weather conditions. Admixtures are essential to managing these challenges, aiding in set time, workability, and moisture retention. Various admixtures like hydration control, water reducers, and viscosity modifiers help balance pervious concrete’s properties. Benefits of using admixtures include improved compaction, strength, durability, and resistance to freeze-thaw cycles. The presentation also indicated ongoing research and documentation efforts to enhance understanding and application of pervious concrete admixtures.

Keywords

pervious concrete

stormwater control

admixtures

construction challenges

moisture retention

freeze-thaw resistance