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本文以钢渣和粉煤灰为原料,通过碱激发方式制备了地质聚合物胶凝材料。测试了钢渣不同含量下,粉煤灰基地质聚合物的1 d、3 d、7 d、28 d抗压强度,并采用XRD、FTIR、SEM对28 d样品进行表征。抗压强度测试中,当钢渣掺量为30%时强度最高,达到40.33 MPa。红外图谱分析表明反应生成了Si-O-T(Si,Al)三维网状结构的地质聚合物。样品晶相分析中发现了C-S-H相,表明在发生地质聚合反应的同时也发生了水化反应。通过SEM微观形貌图可以看到,钢渣掺量为30%的样品结构致密,孔隙率低,但当钢渣掺量过高时,由于钢渣活性较低,钢渣碱激发效果下降,仍有部分未反应的钢渣颗粒出现。
In this paper, steel slag and fly ash as raw materials, prepared by geopotential geopolymer gelling material. The compressive strength of fly ash-based geopolymers at 1, 3, 7 and 28 days was tested under different contents of steel slag. The samples were characterized by XRD, FTIR and SEM. Compressive strength test, when the steel slag content of 30%, the highest strength, reaching 40.33 MPa. Infrared spectrum analysis showed that the reaction generated Si-O-T (Si, Al) three-dimensional network structure of geopolymer. The C-S-H phase was found in the crystalline phase of the sample, indicating that the hydration reaction took place simultaneously with the geopolymerization. SEM micrographs show that samples with a steel slag content of 30% have compact structure and low porosity. However, when the steel slag content is too high, the slag activation is lower and the slag excitation effect is still low. The reaction slag particles appear.