Evaluation of laboratory compaction methods for pervious concrete.

摘要

As society's infrastructure continues to grow and develop, pervious open areas are being depleted and replaced by impervious surfaces such as rooftops, sidewalks, and parking lots. Storm water runoff is an increasing concern of many municipalities as city engineers must design for increased storm drain and sewer system capacities. To address these concerns, pervious concrete has become a popular product that can reduce water runoff by allowing water to permeate through the pavement surface and into the underlying soil.Pervious concrete contains little to no fine aggregate, thus allowing voids of 15% to 35%. Currently, very few testing standards exist for pervious concrete resulting in decreased quality control and in some cases poor pervious concrete pavements. This thesis evaluates laboratory compaction methods for pervious concrete. Many of pervious concrete's properties are related to the amount and type of compaction. Compressive strength, durability, unit weight, and porosity are all properties that can be directly related to compaction of a pervious concrete mixture. This thesis evaluated four methods of laboratory compaction. Results from this study demonstrate that the weight versus volume method produced pervious specimens with superior strength when compared to three other methods. In addition, a common industry method, the jigging method, produced acceptable results. The research herein provides recommendations for pervious concrete sample preparation for laboratory testing.