Abstract
This study aims at to utilize two industrial wastes like fly ash and electroplating waste sludge in various geotechnical and highway engineering applications such as filling of embankments, construction of highways, replacement of poor soil etc., by conducting laboratory modified compaction tests on plain fly ash (control specimen) and fly ash mixed with lime precipitated electroplating waste sludge. The lime precipitated waste sludge was mixed with fly ash from 5 to 60% with an increment of 5% by weight of fly ash. The combinations of each mixture were investigated in this study in order to evaluate the maximum dry density and optimum moisture content of the mix by modified Proctor compaction tests. The effects of fresh and remoulded samples, waste sludge and compactive effort on compaction properties of fly ash and fly ash-waste sludge mixes were also investigated in the present study. On the basis of modified compaction tests, the effective percentages of waste sludge were found between 30%–45% by weight of fly ash. Therefore, for practical consideration the results of 70%–55% fly ash and 30%–45% lime precipitated electroplating waste sludge have been considered in this study.
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