选择性溶解法研究大掺量矿物掺合料的复合水泥浆体中硅VIP免费

2011年6月10日摘要粉煤灰和硅灰现已成为高性能水泥中必不可少的性能调节型辅助性胶凝材料，确定水泥浆体中粉煤灰或硅灰的反应程度，对评价它们的反应活性及其对该体系结构形成的贡献、研究反应动力学等具有重要意义。本文选取粉煤灰与硅灰，采用盐酸选择性溶解法测定粉煤灰和硅灰的反应程度，研究水泥浆体中粉煤灰或硅灰的反应程度与掺量的关系。实验分别对煅烧—沥滤工艺中的煅烧活化过程、溶出过程进行探究。通过对粉煤灰的活化机理进行研究，选用Na2CO3为活化剂，选择H2SO4为溶出剂。对同一掺量比粉煤灰不溶物和水泥不溶物及各个龄期复掺不溶物中铝盐含量进行研究，实验采用络合滴定法，以乙二胺四乙酸（EDTA）为络合剂有效滴定铝离子。关键词：粉煤灰，硅灰，反应程度，活化，络合剂AbstractFlyashandsilicafumehigh-performanceconcretehasbecomeanindispensablehelpertypeperformancetuningcementitiousmaterialstodeterminethecementpasteandsilicafumeinthereactionofflyashortheextentoftheevaluationoftheirreactivityandtheircontributiontotheformationofthearchitecture,kineticstudyhasimportantsignificance.Thisselectionofflyashandsilicafume,theuseofhydrochloricacidselectivedissolutionmethodforthedeterminationofthereactionofflyashandsilicafumedegreeofcementpasteandflyashorsilicafumeinthereactionoftherelationshipbetweenthedegreeandcontent.Experimentswerecalcined-leachingcalcinedintheactivationprocess,thedissolutionprocessofinquiry.ThroughtheactivationmechanismofflyashstudyNa2CO3usedasanactivator,selectH2SO4asdissolutionagent.Comparedtothesamecontentandcementflyashinsolubleinallageinsolubleandinsolubleinthealuminumdopedcompoundcontentofresearchandexperimentbycomplexometrictitrationtoethylenediaminetetraaceticacid(EDTA)ascomplexingagenteffectivetitrationaluminumion.Keywords:flyash,silicafume,thedegreeofresponse,activation,complexingagent目录第一章前言................................................................11.1研究现状及前景...............................................................................................................11.2粉煤灰和硅灰对胶凝材料作用机理的研究现状..............................................21.2.1粉煤灰的活性...............................................................................................................21.3粉煤灰、硅灰对水泥浆体的影响............................................................................51.3.1粉煤灰.................................................................................................................51.3.2硅灰.....................................................................................................................71.3.3双掺粉煤灰、硅灰作用机理探讨.......................................................................81.4选择性溶解法的国内外研究动态............................................................................91.5从粉煤灰中提取氧化铝的研究现状.....................................................................10第二章研究方案、原材料、试验仪器及试验方法.......................122.1试验流程...............................................................122.2试验原材料..............................................................................................132.3试验仪器及试验方法..............................................................................142.3.1试验仪器................................................................................................................142.3.2试验配比方案.......................................