2023年第6期广东化工第50卷总第488期www.gdchem.com·17·碱激发矿渣/偏高岭土在岩溶水中短期侵蚀行为研究高泽朝，刘乐平，张世瑞(南宁师范大学化学与材料学院，广西天然高分子化学与物理重点实验室，广西南宁530001)[摘要]高钙胶凝材料在岩溶水中会发生钙浸出，本文研究了20%偏高岭土掺量对碱激发矿渣材料在岩溶水中侵蚀行为的影响。随着龄期增加，4种溶液环境中试样质量变化增长，外层pH值下降同时Ca2+浓度增加，然而里层pH值和Ca2+浓度变化不明显。1x侵蚀深度作为参考，5x加速因子是0.99372。XRD和TGA结果表明30天外层试样侵蚀产物CaCO3，HCO3-浓度较大侵蚀产物CaCO3含量较大，生成CaCO3沉淀填充并细化孔隙抑制侵蚀性离子进入试样内部，利于试样抗岩溶水侵蚀。[关键词]碱激发材料；矿渣/偏高岭土；岩溶水环境；侵蚀；加速因子[中图分类号]TU521.4[文献标识码]A[文章编号]1007-1865(2023)06-0017-04StudyontheShort-termCorrosionBehaviorofAlkali-activatedSlag/MetakaolininKarstWaterGaoZechao,LiuLeping,ZhangShirui(CollegeofChemistryandMaterials,GuangxiKeyLaboratoryofNaturalPolymerChemistryandPhysics,NanningNormalUniversity,Nanning530001,China)Abstract:High-calciumcementitiousmaterialsaresubjecttocalciumleachinginkarstwater.Inthispaper,theeffectof20%metakaolindosageonthecorrosionbehaviorofalkali-activaitedslagmaterialsinkarstwaterwasinvestigated.Withtheincreaseofage,themasschangeofsamplesinfoursolutionenvironmentsshowedanincreasingtrend,thepHvalueoftheouterlayerdecreasedwhileCa2+concentrationincreased,however,thepHvalueandCa2+concentrationoftheinnerlayerdidnotchangesignificantly.1xcorrosiondepthwasusedasareference,andthe5xaccelerationfactorwas0.99372.XRDandTGAresultsshowedthatthecorrosionproductCaCO3ofthe30-dayouterlayersamples,withthelargerHCO3-concentration.ThecorrosionproductCaCO3contentislarger.LargerHCO3-concentrationgeneratesCaCO3precipitationtofillandrefinetheporespacetoinhibitthecorrosiveionstoentertheinner,whichisbeneficialforthesampletoresistkarstwatercorrosion.Keywords:alkali-activaitedmaterial；slag/metakaolin；karstwaterenvironment；corrosion；accelerationfactor1引言国家“双碳战略”实施和经济高质量发展，水泥生产和使用面...
