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ID:33363136
大小:2.19 MB
页数:65页
时间:2019-02-25
《抹面抗裂砂浆性能的试验研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、西安建筑科技大学硕士论文抹面抗裂砂浆性畿的试验研究专业:材料学硕士生:王宝玉指导教师:尚建丽教授摘要针对传统抹面砂浆施工和易性差、粘结力低、收缩率大、用于墙体抹面易开裂等问题,本文从材料、施工的角度提出了解决问题的方法:用口一聚合物、有机纤维、粉煤灰、高效减水剂等对传统砂浆进行合理的改性,提高抹面砂浆的粘结强度,减小砂浆的收缩,从而大幅度提高砂浆抗裂的能力,达到控制砂浆裂缝、提高其使用寿命的Et的。本文首先通过理论分析,提出了抹面砂浆的评价指标,其次通过大量试验,系统地研究了口一聚合物、有机纤维、粉煤灰对砂浆的物理性能和力学性能(抗压强度、抗折强度、折压比、粘结强度、收缩率
2、)的影响;设计了抹面抗裂砂浆的合理配比。最后通过扫描电子显微镜(sEM)分析,阐述了Or"一聚合物、有机纤维、粉煤灰的微观阻裂作用机理。通过本课题的研究,开发抹面抗裂砂浆,经中试证明,与普通砂浆相比,抗裂砂浆的和易性、施工性能、粘结强度、抗折强度、折压比、收缩率等综合性能均有较大的改善。粘结强度和抗裂性能,是本文重点研究内容。关键词:聚合物抗裂砂浆评价指标纤维粉煤灰收缩率Researchonthepropertiesofthecrack-resistancefrontmortarSpeciality:MaterialsScienceCandidate:W觚gBaoyuSup
3、ervisor:Prof.ShangJianliAbstractThetraditionalfrontmortarhasWOlWseworkability,lowbendingstrength,largeshrinkageandmorecracks.Themethodsofsolvingtheseproblemsfromthepointofmaterialandconstructionareputforward.Namely,cl-polymer,organicfiber,hyingashandsuperplasticiserareusedtomodifythetradit
4、ionalmortar.Itimprovesthebondingstrengthoffrontmortaranddecreasestheshrinkageratioofmortar,andalsoincreasesthepropertyofcrack-resistancegreatly.Therefore,thecracksinmortarwouldbeincontrolandthelifeofmortarwouldbeimproved.Inthispaper,firstly,theevaluationindexoffrontmortarisputforwardbythet
5、heoreticalanalysis.Andthentheinfluenceof口·polymer,organicfiberandflyingashonthephysicalpropertiesandmechanicalproperties(includingthecompressstrength,theflexuralstrength,theratioofthefiexuralstrengthtothecompressstrength,theshrinkageratio)ofmortarareresearchedsystemicallybylotsofexperiment
6、.Thustherationalrateofcrack-resistancefrontmortarisdesigned.Intheendofthepaper,thecrack-resistancemechanismofcz-polymer,organicfiberandhyingasharestudiedbySEManalysis.Thecrack—resistancemortarisdevelopedvialotsofstudies.Comparedwithtraditionalmortar,thisnewtypecrack-resistancemortarhasbett
7、erperformanceofworkability,construction,bondingstrength,theflexuralstrength,theratiooftheflexuralstrengthtothecompressstrengthandtheshrinkageratio.Thebondingstrengthandcrack-resistanceofmortariStheimportantcontentofthispaper.Keywords:polymer,crack—resistancemo
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