摘要
为了解决煤气化渣在工业生产中大量产生但难以得到有效利用,以及传统水泥材料的强度提升受限的问题,本文研究了煤气化渣的改性以及在水泥中的应用.采用特定的溶剂,在适宜的温度和搅拌条件下,对煤气化渣进行改性处理,再将改性后的煤气化渣作为掺合料加入水泥中,评价了其作用效能.结果显示,随着煤气化渣的掺量增加,水泥强度先升后降,掺量为15％时强度最优.使用溶剂对煤气化渣进行改性,15％掺量下,2.5％的改性剂可使水泥块7d和28d的抗压强度分别达到2.15MPa和7.0MPa.在水泥碎石中,3％的改性剂可使水泥块7d和28d的抗压强度达到12MPa和18MPa.本文优化了煤气化渣的改性条件,优选了掺量和改性剂用量,将其掺入水泥后,提升了水泥基材料的强度,为煤气化渣在水泥工业中的高值化利用提供了理论和数据参考.
Abstract
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.
维普
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