Sometimes diesel oil or kerosene are blended in earlier than delivery to retain liquidity; upon supply, these lighter materials are separated out of the combination. Some dump vans route the hot engine exhaust via pipes in the dump physique to keep the material warm. oil companies search of tippers carrying asphalt, in addition to some handling tools, are additionally commonly sprayed with a releasing agent before filling to aid launch. Diesel oil is no longer used as a release agent because of environmental concerns. Asphalt was used beginning within the Sixties as a hydrophobic matrix aiming to encapsulate radioactive waste similar to medium-activity salts produced by the reprocessing of spent nuclear fuels or radioactive sludges from sedimentation ponds. One of the main downside is the swelling of asphalt uncovered to radiation and to water.
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