Effect of tire derived aggregate on maximum dry density of kaolin

The use of Tire-Derived Aggregates (TDA) as highly permeable light weight material has been highlighted in different aspects of geotechnical engineering such as retaining walls, embankments and roads. In addition, in terms of human health and environmental matters, TDA usage is gaining attention. This paper gives an insight into the effect of TDA on the Maximum Dry Density (MDD) of Kaolin. A number of 273 compaction tests, were conducted on both Kaolin and Kaolin-TDA mixtures. Granular (5-8 mm), Granular (1-4 mm), Shredded (6-19 mesh) and Powdery (80 mesh) as various types of TDA, in different percentages from 0% to 60% by weight were mixed with Kaolin. Samples were compacted, using standard proctor procedures in accordance with British Standard. Findings show, that the MDD of Kaolin decreases within the range of 9% to 45%. Apart from that, based on the general results, it is observed that there is a significant change in the MDD of Kaolin-TDA mixture while the changes occurred in Optimum Moisture Content (OMC) is not remarkable. Depending on geotechnical problem, the wide range of the results could be used as a proper source for selecting the optimum percentage of Kaolin-TDA mixture