CAJ | 학술논문

研究了青岛高岭土制备地聚物的最佳条件和地聚物的水化过程。重点考察了水灰比、碱激发剂掺量、水玻璃模数等因素对地聚物抗压强度的影响。结果表明：以高岭土煅烧得到的偏高岭土为原料制备地聚物，当水灰比为0.35、碱激发剂掺量为21％、水玻璃模数为1.4时，地聚物具有较高的强度。由此制备的地聚物试块在50℃下用保鲜膜包裹养护9 d 再自然养护19 d，其抗压强度为71 MPa。通过XRD、SEM对地聚物的水化过程进行了研究，揭示了地聚物不同水化时间的微观结构变化，结果表明：地聚物在水化过程中，先脱水缩聚生成小颗粒地聚物前驱体，然后进一步生成相对较大的分子，最后连接成网状结构，形成致密结构；其水化产物主要是网状无定型的硅铝凝胶，对应的XRD衍射区域为20°～30°。
연구료청도고령토제비지취물적최가조건화지취물적수화과정。중점고찰료수회비、감격발제참량、수파리모수등인소대지취물항압강도적영향。결과표명：이고령토단소득도적편고령토위원료제비지취물，당수회비위0.35、감격발제참량위21％、수파리모수위1.4시，지취물구유교고적강도。유차제비적지취물시괴재50℃하용보선막포과양호9 d 재자연양호19 d，기항압강도위71 MPa。통과XRD、SEM대지취물적수화과정진행료연구，게시료지취물불동수화시간적미관결구변화，결과표명：지취물재수화과정중，선탈수축취생성소과립지취물전구체，연후진일보생성상대교대적분자，최후련접성망상결구，형성치밀결구；기수화산물주요시망상무정형적규려응효，대응적XRD연사구역위20°～30°。
The optimum preparation conditions and hydration process of Qingdao metakaolin geopolymer are studied,focusing on the influence of water cement ratio,mixing amount of alkali activator and water glass mod-ulus,to the compressive strength of geopolymer.Compressive strength increased when the water cement ratio was 0.35 ,the content of alkali activator to metakaolin was 2 1%and the modulus of the activator molar ratio of SiO2/Na2O was 1.4.The compressive strength of this sample was 71 MPa when cured at 50 ℃for 9 d followed by 25 ℃ for 19 d.The hydration process is studied by XRD and SEM.The changing of the microstructure of geopolymer in different time is shown in the test.In the hydration process of geopolymer,they were dehydrated and condensed to form small geopolymer precursors,then changed into big ones.The geopolymer precursors were finally connected into a network structure,forming a dense structure.The main hydration product is net-work silica alumina gel which is amorphous and its XRD diffraction ranges from 20°to 30°.