Research on Coal Gasification Slag Modification and Its Application in Cement Reinforcement
In order to solve the problems associated with coal gasification slag,which is produced in large quantities during industrial production but is difficult to utilize effectively,this thesis investigates the modification of coal gasification slag and its application in cement.Specific solvents were used to modify the coal gasification slag under suitable temperature and mixing conditions,and the modified slag was introduced into cement as an admixture to evaluate its effectiveness.The results showed that with the increase in dosage,the strength of the cement first increased and then decreased,with an optimal dosage of 15％.The performance of the gasification slag was further improved by modifying it with solvents.A 2.5％modifier at a 15％dosage resulted in 7d and 28d compressive strengths of cement blocks of 2.15MPa and 7.0MPa,respectively;while a 3％modifier in cement crushed stone resulted in 7d and 28d compressive strengths of up to 12MPa and 18MPa.In this study,the conditions for modifying the gasification slag were optimized,and the dosages of both the slag and the modifier were selected appropriately.Its incorporation into cement enhanced the strength of the cementitious materials and provided theoretical and practical support for the high-value utilization of coal gasification slag in the cement industry.
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