矿物掺合料与水泥复合胶凝体系性能研究

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1、摘要本论文所研究的复合胶凝体系是由硅酸盐水泥一石粉一矿渣一粉煤灰所组成的二元、三元和四元三种复合胶凝体系。在研究中分别对三种复合胶凝体系的宏观性能进行了研究，并在此基础上重点对复合胶凝体系浆体的水化过程及其水化特性进行了研究。包括对水化产物的组成和微观结构、水化放热规律以及水化过程中的电化学特性，并讨论了复合胶凝体系浆体水化过程中的热、电特性参数与水化进程的关系。1．通过测试三种复合胶凝体系浆体的标准稠度需水量、凝结时间、力学强度等宏观性能，了解了三种复合胶凝体系浆体性能随矿物掺合料掺量的变化规律。2．

2、测试了三种复合胶凝体系浆体的收缩及抗裂性能，分析了矿物掺合料对复合胶凝体系收缩及抗裂性能的影响。3．采用x一射线衍射、扫描电子显微镜及能谱等现代测试方法分析了三种复合胶凝体系浆体水化浆体的组成和微观形貌，分析了三种复合胶凝体系浆体水化产物的特性。4．测试了三种复合胶凝体系浆体的水化放热量及水化放热速率，分析了矿物掺合料对复合胶凝体系浆体水化放热行为的影响。5．测试了三种复合胶凝体系水化浆体的电阻率变化曲线，分析了矿物掺合料对电阻率变化的影响及其与水化进程的关系。6．测试了三种复合胶凝体系水化浆体不同龄期

3、的交流阻抗特性，探讨了矿物掺合料对交流阻抗参数与水化进程及浆体微观结构的影响。关键词硅酸盐水泥；矿物掺合料；收缩；水化ABSTRACTThesubjectthaithethesisstudiedisthesystemthatcomprisedwithsilicatecement-limeateneflour-flyash-slag,Based011thestudyonthemechanicalperformanceofthecompoundsystmcement,thepaperstressedtheh

4、ydratedproductionandthemierom'uctlltreofthesilicatecement-limestoneflour-flyash-slagcompoundsystemcement,includingtheproductandthemicrostmetureofthehydration,theheatofthehydrationandtheelectricalcharacteristicduringthehydration,discussedtherelationbetwee

5、nthethermoparameterandelectricalparameterwiththehydrationcoul'se．1．Throughtesfingthemechanicalperformanceofthesilicatecement-limestoneflour-flyash-slagcompoundsystemcement,includingthewaterrequirementofnormalconsistency,thesettingtimeandthestrengthcharac

6、ter,weknewtheregularityoftheperformance．2．Theshrinkageandcrackresistanceofthesilicatecement-limestoneflour-flyash-slagsystemweretested，andtheinfluenceofthemineraladmixture0ntheshrinkageandcrackresistanceofthesilicatecement-limestoneflour-flyash-slagcompo

7、undsystemcementwereanalyzed．3．BymeansOfXRD,SEMmeasurement,thecompositionandthemicrostmetureofthecompoundsystemcementpasteweretested，thecharacterofthehydrationproductsinthe&fferentcompoundsystemwereanalyzed．4．Therateofhydrationheatevolutionandhydrationhea

8、tofthesilicatecement-limestoneflour-flyash-slagsystemweretested，andtheinfluenceofthemineraladmixtureontheheatofthehydrationwereanalyzed．5．Theelectricalresistivityofthesilicatecement-limestoneflour-flyash—slagpastewereteste