水泥净浆力电机敏性的试验研究
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摘要
研究了水泥净浆从小载荷直至破坏时的力电效应。研究表明 :水泥净浆在单向压应力作用下产生电流 ,电流强度随应力的增加而增加 ,电流强度与应力之间存在一一对应关系。载荷保持时 ,电流逐渐减小。随着水灰比的增加 ,敏感性也增加。力电机敏性随含水量的增加而增加 ,从而进一步验证了力电效应的机理。这一研究对开发多功能的混凝土机敏材料有重要的意义
Mechano electric effect of cement paste under low load to breakage was investigated in this paper. Electrical current was produced in cement paste under uniaxial compressive stress, which increased as the load increased. As the load kept stable, electrical current decreased gradually. And the sensitivity increased with the ratio of water/cement increasing. The fact that mechano electric effect was related to the content of water in specimens could be used to prove the mechanism of mechano electric effect. The study is important to develop the multifunctional concrete smart material.
Mechano electric effect of cement paste under low load to breakage was investigated in this paper. Electrical current was produced in cement paste under uniaxial compressive stress, which increased as the load increased. As the load kept stable, electrical current decreased gradually. And the sensitivity increased with the ratio of water/cement increasing. The fact that mechano electric effect was related to the content of water in specimens could be used to prove the mechanism of mechano electric effect. The study is important to develop the multifunctional concrete smart material.
引文
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[11] 孙明清,李卓球,刘清平.水泥净浆的力电和电力效应研究[J].混凝土,2001(11):51～53.
[2] 瞿伟廉,李卓球,姜德生等.智能材料-结构系统在土木工程中的应用[J].地震工程与工程振动,1999,19(3):87～95.
[3] RogersC A.IntelligentMaterialSystem——TheDawn of aNewMaterialsAge[J].JIntellMaterSystStruct,1993(4):4～12.
[4] ChenPuwoei,ChungD D L.CarbonFiberReinforcedConcrete as anIntrinsicallySm artConcrete forDam ageAssess-mentDuringDynamicL oading[J].JAmCeramSoc,1995,78(3):816～818.
[5] 毛起火召,杨元霞,李卓球等.碳纤维增强水泥压敏性影响因素的研究[J].硅酸盐学报,1997,25(6):734～737.
[6] 王秀峰,王永兰,金志浩.碳纤维增强水泥复合材料的机敏性[J].硅酸盐学报,1998,26(3):253～257.
[7] SunM,L iZ,MaoQ et al.Study onThermalSelf- monitoring ofCarbonFiberReinforcedConcrete[J].CemConcrRes,1999,29(5):769～771.
[8] Wittm annF H.Observation of anElectrom echanicalEffect ofHardenedCementPaste[J].CemConcrRes,1973(3):601～605.
[9] AyaoKitahara,AkiraWatanabe.界面电现象[M].邓 彤,赵学范译.北京:北京大学出版社,1992.
[10] SunMingqing,L iuQingping,L iZhuoqiu et al.A Study ofPiezoelectricProperties ofCarbonFiberReinforcedCon-crete andPlainCementPasteDuringDynam icL oading[J].Cem entConcreteResearch,2000,30(10):1593～1595.
[11] 孙明清,李卓球,刘清平.水泥净浆的力电和电力效应研究[J].混凝土,2001(11):51～53.
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