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时间:2020-04-20
《水泥砂浆试件单轴压缩光纤光栅检测实验.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、媾幺分(2013—11)·53·水泥砂浆试件单轴压缩光纤光栅检测实验柴敬一,李旭娟,李毅,王刚(1.西安科技大学能源学院,陕西西安710054;2.西部矿井开采与灾害防治教育部重点实验室,陕西西安710054;3.中煤西安设计工程有限责任公司,陕西西安710054)摘要:为了检测岩层内部变形及其发展过程,采用埋入光纤Bragg光栅传感器的方法对水泥砂浆试件变形进行监测。制作了9种配比,36个试件,在实验室分别用MTS一815伺服试验机和WE~30型万能材料试验机进行了单轴压缩实验,并对3个埋有光纤光栅传感器的水泥砂浆试件作了深入分析。研究表明,埋入试件内部的光纤传感器在变
2、形范围肉能反映出试件内部的摩擦、滑移等现象;灰砂比为1,水灰比为0.5时抗压强度和弹性模量最大,泊松比差别很小,且无论水灰比怎么变化,试件都有抗压强度和弹性模量减小,泊松比增大的趋势;得出了最有利的封孔砂浆配比。关键词:水泥砂浆试件;单轴压缩;光纤Bragg光栅;检测;实验研究中图分类号:TD315文献标志码:A文章编号:1003—496X(2013)11—0053—03ExperimentofCementMortarSpecimenUniaxialCompressionbyFiberBraggGratingDetectingCHAIJing,LIXu—juan,LIYi
3、,WANGGang(1.SchoolofEnergyResources,XianUniversityofScienceandTechnology,Xian710054,China;2.KeyLaboratoryofWesternMineExploitationandHazardPrevention,Xian710054,China;3.ChinaCoal缸nDesignEngineeringCo.,Ltd.,Xian710054,China)Abstract:Inordertodetectinternaldeformationanddevelopmentprocessof
4、rockstrata,thearticleusedembeddedopticalfiberBragggratingsensortodetectcementmortarspecimendeformation.Inordertofindoutbestcementproportioning,36testingsamplesfor9kindsofratioweremade.AllsamplesweretestedbyuniaxialcompressionexperimentwithMTS一815servotesterandWE一30typeU—niversaltestingmac
5、hineinthelaboratory.ThreesampleswhichwereburiedwithfiberBragggratingsensorinthecementwereana—lyzed.Theresultsshowedthattheburiedfibersensorscouldgiveaccuracyresultsaboutinternalfriction,slipphenomenonincementspecimen.Whensandcementratiowas1andwatercementratiowas0.5,thecompressivestrengtha
6、ndtheelasticmodulusreachedmaximum,butPoissongratiohadlittlediferencecomparedwithothercomposition.Nomatterhowwater—cementratiochanged,sam—plegcompressivestrengthandelasticmodulusdecreasedandPoisson"sratioincreased.thebestcementmortarproportioningwasob—tainedfordrillingsealing.Keywords:ceme
7、ntmortarspecimen;nniaxialcompression;fiberBragggrating;detection;experimentalstudy实验参照砂浆、混凝土、岩石的规范执行,1水泥砂浆试件单轴压缩实验结合现场施工水泥砂浆封孔的配比m砂:m灰:m水为1.1材料选取及水泥砂浆试件制备1:1:0.5~1:1:0.65,采用标准的+5ommX100min水泥选用32.5R复合硅酸盐水泥;砂为河砂,磨具,共制作了9种配比,36个水泥砂浆试件。每粒径为1.25~2.5inn,砂中含泥量按质量计为组配比制作3个或
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