硅酸盐通报2025，Vol.44Issue(2)：393-402,10.DOI:10.16552/j.cnki.issn1001-1625.20241118.005
复掺铝酸钙水泥和硅灰石对磷酸钾镁水泥耐腐蚀性能影响机理研究
Influence Mechanism of Compounding Calcium Aluminate Cement and Wollastonite on Corrosion Resistance of Magnesium Potassium Phosphate Cement
摘要
Abstract
In order to explore calcium aluminate cement(CAC)and wollastonite(WS)synergistic modification effect,13 groups of modified magnesium potassium phosphate cement(MKPC)specimens with different mix ratios were designed by compounding CAC and WS in this paper.The corrosion resistance and microscopic characteristics of modified MKPC under the action of NaCl,MgSO4,NaOH and H2SO4 solutions were studied.The results show that the reaction product of CAC is coated on the MKPC hydration product magnesium potassium phosphate hexahydrate(MgKPO4·6H2O)in the form of amorphous aluminum gel and fill in the pores between MgKPO4·6H2O crystals,which improves the microstructure of MKPC and inhibits the corrosion of corrosive media.As an inert component,WS does not participate in hydration reaction of MKPC,but makes the pore structure of MKPC denser by filling.The synergistic effect of CAC and WS can effectively improve the corrosion resistance of MKPC in NaCl and MgSO4 solutions.When the content of CAC and WS is 15％and 5％of the mass of cementitious material,the improvement effect is the best.In NaOH and H2SO4 solutions,the CAC reaction products filled between MgKPO4·6H2O crystals are corroded,resulting in the formation of interconnected channels between crystals,which affects the improvement of corrosion resistance.关键词
磷酸钾镁水泥/铝酸钙水泥/硅灰石/耐腐蚀性能/微观结构Key words
magnesium potassium phosphate cement/calcium aluminate cement/wollastonite/corrosion resistance/microstructure分类
化学化工引用本文复制引用
白亮,栗远航,王鑫,郑辉,梁兴文..复掺铝酸钙水泥和硅灰石对磷酸钾镁水泥耐腐蚀性能影响机理研究[J].硅酸盐通报,2025,44(2):393-402,10.基金项目
国家自然科学基金(51208058,51708035) （51208058,51708035）
陕西省自然科学基金(2022JM-242) （2022JM-242）
陕西省教育厅科学研究计划项目(21JP006) （21JP006）
