镍渣基地聚物的制备及其性能研究

Study on preparation and performance of nickel slag based geopolymer

研究了激发剂种类和模数对镍渣基地聚物抗压强度、抗折强度和干燥收缩的影响。结果表明,可通过碱激发技术实现对镍渣的资源化利用,不仅可解决镍渣堆置的环境问题,还可产生经济效益。采用模数为1.0的硅酸钠(钾)作为激发剂时,镍渣基地聚物的强度发展最快,28 d抗压、抗折强度分别为23.2、4.9 MPa;采用氢氧化钠作为激发剂时,镍渣基地聚物的干燥收缩最小,28 d干燥收缩为0.65 mm/m。

In this paper,the effects of activator modulus and activator type on the compressive strength,flexural strength and drying shrinkage of nickel slag based geopolymer were studied.The results showed that the utilization of nickel slag could be realized by alkaline activation technology,which can not only solve the environmental problem of nickel slag accumulation,but also generate economic benefits.When sodium(potassium)silicate with modulus of 1.0 was used as the activator,the strength of nickel slag based geopolymer were the highest,the compressive strength and flexural strength were 23.2 MPa and 4.9 MPa after curing for 28 days,respectively.When sodium hydroxide was used as the activator,the drying shrinkage of the nickel slag based geopolymer was the smallest,the drying shrinkage after curing for 28 days was 0.65 mm/m.