In this paper,studies on the modification on the low temperature coal tar pitch extracted from coal tar residue in Inner Mongolia are conducted.First,the low temperature coal tar pitch in liquid state is solidified with a higher softening point by chemical crosslinking modification.The modified coal tar pitch can achieve the standard pavement performance requirements.Then,the effects of chemical crosslinking agent and physical modification additives on the mechanical performance and toxic properties of coal tar pitch are investigated.The detoxification mechanism is also studied,which further promote the applicability of modified low temperature coal tar pitch in the pavement constructions.
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机译:Time-to-enrollment in clinical trials investigating neurological recovery in chronic spinal cord injury: observations from a systematic review and ClinicalTrials.gov database
机译:Fundicion de asarco en Hayden Investigacion sobre la Exposicion:Resumen de los Hallazgos,Hayden y Winkelman,arizona(asarco Hayden smelter Exposure Investigation:a Findings,Hayden and Winkelman,arizona)。