溫度作用后緩沖回填材料的力學(xué)特性及縱波速度研究.pdf

1、西南科技大學(xué)碩士學(xué)位論文溫度作用后緩沖回填材料的力學(xué)特性及縱波速度研究姓名：嚴(yán)明慶申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：易發(fā)成；朱寶龍20120413西南科技大學(xué)碩士研究生學(xué)位論文第1I頁AbstractHigh—levelradioactivewasteisaspecialwastethatistoxicandhavelonghalflifeIftheHigh]evelradioactivewastegetintothebiosp

2、hereitwillbegivingtobringseriousharmBuffer／backfillmaterialsbetweenthewastetankandgranite，arethelastmultibarriersystemofartificialbarriersinhighlevelradioactiverepositoryItmustmaintainthestabilityofthestructureoftherepos

3、itoryandhaveagoodthermalconductionanddiffusiontotheradiantheatThereforestudytheactionofthemechanicalpropertiesofbuffer／backfillmaterialunderthetemperatureisextremelyimportantsignificanceforthesafedisposalofhighlyradioact

4、ivewasteUsingofadvancedexperimentalequipmenttostudythebuffer／backfillmaterialforcecharacteristicsandPwavevelocityaftertemperatureThemajorcontentsandinnovationoftheresearcharelistedasfollowing：(1)Experimentsonbuffer／backf

5、illmaterialunderuniaxialcompressionaftertemperature(25℃～300。C)werecarriedonindividuallyusingelectro—hydraulicservouniversaltestingmachineWegetthebuffer／backfillmaterialofpeakstress，elasticmodulusandpeakstrainThebuffer／ba

6、ckfillmaterialofpeakstress，elasticmodulus，peakstrainwiththetemperaturevariationwereanalyzed(2)UsingtheRSM—theSY6ultrasonicdetectordetectthebuffer／backfillmaterialandwegettherelationshipbetweenthewavevelocityofthebuffer／b

7、ackfillmaterialswiththetemperatureandanalysistherelationshipbetweenthemicroscopicstructureofthebuffer／backfillmaterialandtemperatureThebuffer／backfillmaterialofmicrostructureimagesofscanningelectronmicroscopy(SEM)wereana

8、lyzed(3)Byuniaxialcompressiontest，wegetthedamagetypeofbuffer／backfillmaterial25℃，itisweakshearsurfacedamage100。C～150。Citisbrittleshearfailure200℃～300℃itisbrittlefracture(4)Wegetbuffer／backfillmaterialdamageconstitutiveeq