硼、钠复合掺杂对贝利特-硫铝酸钙水泥性能及微观结构的影响
发布时间：2018-08-19 13:38
【摘要】：采用粘土、铝矾土、碳酸钙为主要原料制备以贝利特(C_2S)、硫铝酸钙和铁铝酸钙为主导矿物的低碳排放水泥熟料(BCSAF),并通过硼(B)和钠(Na)复合掺杂对C_2S矿物进行活化。将熟料与无水石膏按比例混合后制备水泥,研究复合掺杂对水泥净浆强度及微观结构的影响。采用X射线衍射全谱拟合定量相分析法、红外光谱、扫描电子显微镜、X射线能谱分析等测试方法表征熟料及水泥水化浆体组成与结构。研究结果表明,一定掺量的B和Na复合掺杂制备BCSAF水泥熟料可在常温下稳定α′-C_2S或更高活性的C_2S,减少熟料中β-C_2S含量,从而实现C_2S矿物的活化,提高BCSAF水泥熟料早期水化活性,显著提高水泥浆体抗压强度。
[Abstract]:Using clay, bauxite and calcium carbonate as main raw materials, low carbon discharge cement clinker (BCSAF), was prepared with C _ 2S, Ca _ 2SO _ 4 and Ca _ 2SO _ 4 as dominant minerals. C _ 2S minerals were activated by boron (B) and sodium (Na) doping. Cement was prepared by mixing clinker and anhydrous gypsum in proportion to study the effect of composite doping on the strength and microstructure of cement paste. The composition and structure of clinker and cement hydrated slurry were characterized by X-ray diffraction full-spectrum fitting quantitative phase analysis, infrared spectrum and scanning electron microscope X-ray spectrum analysis. The results show that the preparation of BCSAF cement clinker with certain amount of B and Na can stabilize 伪 -C _ 2S or higher activity C _ 2s at room temperature, reduce 尾 -C2S content in clinker, thus realize the activation of C _ 2S minerals and improve the early hydration activity of BCSAF cement clinker. The compressive strength of cement paste is improved significantly.
【作者单位】： 同济大学先进土木工程材料教育部重点实验室;
【基金】：上海市国际科技合作基金(12230708700)
【分类号】：TQ172.1
[Abstract]:Using clay, bauxite and calcium carbonate as main raw materials, low carbon discharge cement clinker (BCSAF), was prepared with C _ 2S, Ca _ 2SO _ 4 and Ca _ 2SO _ 4 as dominant minerals. C _ 2S minerals were activated by boron (B) and sodium (Na) doping. Cement was prepared by mixing clinker and anhydrous gypsum in proportion to study the effect of composite doping on the strength and microstructure of cement paste. The composition and structure of clinker and cement hydrated slurry were characterized by X-ray diffraction full-spectrum fitting quantitative phase analysis, infrared spectrum and scanning electron microscope X-ray spectrum analysis. The results show that the preparation of BCSAF cement clinker with certain amount of B and Na can stabilize 伪 -C _ 2S or higher activity C _ 2s at room temperature, reduce 尾 -C2S content in clinker, thus realize the activation of C _ 2S minerals and improve the early hydration activity of BCSAF cement clinker. The compressive strength of cement paste is improved significantly.
【作者单位】： 同济大学先进土木工程材料教育部重点实验室;
【基金】：上海市国际科技合作基金(12230708700)
【分类号】：TQ172.1
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