无机激发剂的改性及其对固硫灰渣的活性激发研究

Study on modification of inorganic activators and their active excitation on sulfur fixing ash

环保无硫型无机激发剂可消除传统含硫激发剂对环境造成的不利影响,但其在固硫灰渣处理过程中对抗压活性指数的提高不足,限制了工业化应用。为增强无硫型无机激发剂对固硫灰渣掺合料的激发效果,通过引入有机醇胺(TEA)对无机盐体系[CaCO_(3)、CaSiO_(3)、Ca(OH)_(2)]进行复合改性,成功设计了一种TEA-CaCO_(3)-CaSiO_(3)/Ca(OH)_(2)有机-无机复合激发剂,分别研究了无机盐种类、灰渣比和有机醇胺加入量对复合激发剂性能的影响。探索了体系中不同材料间的相互作用对水泥胶砂流动度比和抗压活性指数的影响,进一步提高了水泥胶砂的抗压活性指数、增加了流动度比、改善了无机盐体系的稳定性。结果表明,当灰渣质量比为5∶5、TEA加入量为0.04%、碳酸钙与氢氧化钙加入量分别为1.2%与0.018%时,所得复合激发剂使得胶砂的流动度比保持在97%,28 d抗压活性指数可达105%。这将进一步推动环保型激发剂的工业化应用,促进固硫灰渣的绿色处理。

The adverse effects of traditional sulphurcontaining activators on the environment can be eliminated by environmentfriendly sulphurfree inorganic activators,but the insufficient improvement of their antipressure activity index in the treatment of sulphurfixing ash restricts their industrial application.In order to enhance the excitation effect of sulfurfree inorganic activator on sulfur fixing ash admixture,a TEA-CaCO_(3)-CaSiO_(3)/Ca(OH)_(2) organicinorganic compound activator was successfully designed by introducing organic alcohol amine(TEA)to modify the inorganic salt system[CaCO_(3),CaSiO_(3),Ca(OH)_(2)].The effects of inorganic salt type,ash content,and proportion of organic alcohol amine on the properties of the compound activator were studied.The influence of the interaction between different materials on the fluidity ratio and compressive activity index of cement mortar was explored,and the compressive activity index of cement mortar was further improved,the fluidity ratio was increased,and the stability of the inorganic salt system was improved.When the ratio of ash to slag was 5∶5,the proportion of TEA was 0.04%,and the amount of calcium carbonate and calcium hydroxide was 1.2%and 0.018%,respectively,the resulting composite activator kept the fluidity ratio of mortar at 97%,and the compressive activity reached 105%at 28 days,which would further promote the largescale production of environmentally friendly activators and promote the green application of sulfur fixation ash.