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利用压汞、X射线衍射、扫描电子显微镜和热重等方法研究了水泥–矿渣复合胶凝材料硬化浆体遭受软水溶蚀后的孔隙结构、水化产物、浆体形貌以及Ca(OH)2含量的变化,并研究了软水溶蚀作用下水泥–矿渣复合胶凝材料硬化浆体的微观结构变化规律。结果表明:水泥–矿渣复合胶凝材料硬化浆体经长期软水溶蚀作用后,浆体中的Ca(OH)2含量充足,C–S–H凝胶的Ca/Si比稍有降低,但没有分解的迹象;水泥–矿渣复合胶凝材料硬化浆体的孔隙率比纯水泥试样的低,浆体微观结构致密;矿渣掺量在70%以内的水泥–矿渣复合胶凝材料均表现出良好的抗溶蚀性能。
The pore structure, hydration products, morphology of the slurry and Ca (OH) 2 were studied by means of mercury intrusion, X-ray diffraction, scanning electron microscopy and thermogravimetric analysis after the cement paste was hardened by soft water The change of microstructure of the hardened paste of cement-slag composite cementitious material under the effect of soft water erosion was studied. The results show that the content of Ca (OH) 2 in the slurry is sufficient and the Ca / Si ratio of C-S-H gel slightly decreases after long-term soft water dissolution, but no The porosity of cement-slag composite cementitious material hardened slurry is lower than that of pure cement sample and the microstructure of the slurry is dense. The cement-slag composite cementitious material with slag content within 70% shows good performance Corrosion resistance.