将炉底渣作为唯一原料,探索采用双盐Na2 SiO3/Na2 SO4复合激发剂制备力学性能优良的炉底渣基地质聚合物；在双盐复合激发剂中,当Na2 SiO3掺量为7．74％(质量分数),Na2 SO4掺量为0．5％(质量分数)时,制备的炉底渣基地质聚合物试件在室温养护28 d龄期的抗压强度高达46．94 MPa,较单一 Na2 SiO3激发制得试件的抗压强度增加了15．8％.XRD、SEM以及IR结果表明,双盐复合激发加速了炉底渣中莫来石、石灰的水化反应,生成了纤维状的钙矾石(AFt)以及大量无定形的地质聚合物凝胶,导致Si—O 的非对称伸缩振动吸收以及 Si—O的弯曲振动吸收均发生了位移.
The bottom ash-based geopolymer with excellent mechanical properties was studied by using bottom ash as only one raw material and double salts of Na2 SiO3/Na2 SO4 as co-activator in the paper.When the dosages of co-activator were 7.74wt% Na2 SiO3 and 0.5wt% Na2 SO4 ,the bottom ash-based geopolymer showed the best compressive strength of 46.94 MPa,which increased by 15.8% comparing to the sample obtained by single Na2 SiO3 activation in curing age of 28 d at room temperature.The XRD,IR and SEM results revealed that the co-activation of double salt accelerated the hydration reaction of mullite and lime in bottom ash to produce both fi-brous attringite (AFt)and a large amount of amorphous geopolymer gel so as to lead to the displacement of asymmetric stretching vibration and bending vibration absorptions of Si—O bonds.
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