In order to utilize solid waste electric furnace nickel slag with potential activity,this study aimed to develop a single-component geopolymer repair mortar based on electric furnace nickel slag.Through orthogonal experiments and range analysis,the key influencing factors were adjusted such as alkali modulus,alkali dosage,and the addition of admixtures to regulate the repair performance of the geopolymer mortar.The optimal proportioning ratio and the primary and secondary effects of each factor on repair performance were determined.The findings indicated that the optimal proportioning ratio consisted of 30%slag content,30%fly ash content,alkali modulus of 1.2,and alkali dosage of 6.5%.After 28 days,the compressive and flexural strengths of the mortar reached 90.29 and 9.23 MPa,respectively,and with a drying shrinkage rate of 0.56×10-3.The tensile bonding strength of the mortar reached 3.64 MPa at 14 days.These results met the requirements specified for repair mortar.Among the influencing factors,the slag content exhibited the most significant impact on the regulation of the repair mortar performance.
关键词
电炉镍渣/地聚物修补材料/正交实验/单组分/配合比/性能调控
Key words
electric furnace nickel slag/geopolymer repair material/orthogonality test/one-part/mix optimization/performance control
维普
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