碱激发剂对钢渣胶凝材料抗压强度的影响

Effect of Alkali-activator on Compressive Strength of Steel Slag Cementations Materials

以Na2SiO3,NaOH和Ca（OH）2制备碱性溶液,对钢渣进行活化处理得到碱钢渣胶凝材料,考察了Na2SiO3,NaOH和Ca（OH）2用量对材料的抗压强度影响,并对最优抗压强度的碱钢渣胶凝材料进行了表征.结果表明,Na2SiO3对碱钢渣胶凝材料的7 d抗压强度影响显著,NaOH对材料的3 d抗压强度影响显著,Ca（OH）2对材料的28 d抗压强度影响显著.当Na2SiO3,NaOH和Ca（OH）2用量分别为11.25,4.50和6.75 g时,材料的抗压强度最优.加入碱性溶液有利于胶凝体系中形成沸石类水化产物.

Alkali solution was prepared with Na2SiO3, NaOH and Ca（OH）2, then steel slag was activated using alkali solution obtaining zeolite hydrochemical products. The effects of Na2SiO3 amount, NaOH amount and Ca（OH）2 amount on the compressive strength of the alkali steel slag cementations materials were studied. The optimal compressive strengths of materials were characterized. The results showed that Na2SiO3 has significant effect on 7 d compressive strength of materials, NaOH had significant effect on 3 d compressive strength of materials, Ca（OH）2 had significant effect on 28 d compressive strength of materials. When Na2SiO3 amount was 11.25 g, NaOH amount was 4.50 g and Ca（OH）2 amount was 6.75 g, the compressive strength of materials was the best. The addition of alkali solution was beneficial to the formation of zeolite hydrochemical products in the gelation system.