규산나트륨/규산칼륨 혼합비에 따른 소각바닥재로 제조한 Paste의 압축강도 영향

초록

In this work, paste was made from MSWI (municipal solid waste incineration) bottom ash and slag by geopolymer technique. The effect of mixing ratio of sodium silicate and potassium silicate on its physical property was evaluated. The specimens were cured at 50oC for the period of 1, 3, and 7 days. The compressive strength of cured samples were measured. Compressive strength was decreased with the addition of potassium silicate. Maximum value of 55.9 MPa was obtained at mixing ratio of 95 : 5. From mixing ratio of sodium silicate and potassium silicate, leching results of Si, Al, Ca ions were appeared difference. At mixing ratio of 95 : 5, leaching of Ca ions was decreased the most. As a result, depending on the concentration of leaching ions change compressive strength.

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