With the current environmental and climatic trends that have been observed and studied there has been increasing pressure on different industries and the public at large, to become more environmentally conscious. Interesthas risen regarding the use of pervious concrete as an environmentally friendly pavement option, since it allows water to infiltrate directly into the ground water and reduces the need for a stormwater management system. Pervious concrete is in use in the United States, however, research is currently being conducted to determine whether pervious concrete is suitable for use in cold weather climates. A challenge related to pervious concreteis creating laboratory samples that adequately relate to in-situ conditions. The work outlined in this paper has involved evaluating five methods of pervious concrete sample preparation. The methods included various amounts of rodding and Proctor Hammer blows. Testing of the prepared samples included fresh testing, permeability, air void content and compressive strength. Compressive strength samples were produced for use with either end grinding or sulfur capping as the end preparation method. Pervious concrete has different characteristics than conventional concrete therefore conventional sampling and preparation techniques may not be adequate for perviousconcrete. An appropriate sample compaction method should produce a consistent and reliable sample. The method should also produce a sample that replicates the characteristics of pervious concrete in the field. Samples that were placed in two layers with each layer receiving ten blows from the Proctor Hammer proved to be the most to field placed samples and also had the lowest standard deviations. Overall the paper presents a comprehensive evaluation of five test procedures for laboratory preparation of pervious concrete samples.
Samenvatting