针对燃煤渣的低活性、难处理等问题，以低碳环保的理念为核心对燃煤渣基地聚物的制备工艺和煅烧效果进行了研究。通过单因素试验探讨了煅烧温度、激发剂掺量和液固比等对地聚物抗压强度的影响，并得出了燃煤渣基地聚物的最佳配合比。利用X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和扫描电镜（SEM）等手段研究了地聚物的水化产物和微观形貌，揭示了煅烧过程和地聚合反应前后的矿物相变化，阐明了强度增强机理。结果表明：本研究设计的以氧化钙为主、十二水磷酸三钠（TSPH）为辅的联合激发方式成功制备出28 d抗压强度达到34.5 MPa的地聚物。氧化钙提供的碱性环境、成核位点和TSPH提供的磷酸根都有助于促进燃煤渣中活性组分溶解和复杂凝胶相形成，这是地聚物抗压强度的重要来源。此外，在低于1000℃的高温煅烧条件下，燃煤渣不具备像煤矸石、粉煤灰等固废的热活化性，高温煅烧反而会降低燃煤渣的化学反应活性。

To address the issue of low activity and challenging treatment of burnt coal cinder, the preparation technology and calcination effect of geopolymers based on burnt coal cinder were investigated, with the concept of low carbon and environmental protection as the core. The influence of calcination temperature, activator dosage and liquid-solid ratio on the compressive strength of geopolymers based on burnt coal cinder was investigated by single factor tests and the optimal mix ratio was subsequently determined. By utilizing X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), the hydration products and micromorphology of geopolymers were studied. Revealing mineral phase changes of calcination and geopolymerization process and clarifying the mechanism of strength enhancement. The results indicate that the combined activation method of the main calcium oxide and the auxiliary trisodium phosphate dodecahydrate (TSPH) was successfully employed to prepare the geopolymers with a compressive strength of 34.5 MPa at 28 d. The alkaline environment and nucleation sites provided by calcium oxide, along with the phosphate radicals supplied by TSPH, all contribute to the dissolution of active components in burnt coal cinder and formation of complex gel phases, which is an important source of compressive strength of geopolymers. Moreover, under calcination temperatures of 1000℃, burnt coal cinder lacks the thermal activation property of solid wastes such as coal gangue and fly ash, and high temperature calcination diminishes its chemical reactivity.

湖北省重点研发计划