混凝土湿筛水泥砂浆阻尼比的试验研究
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摘要
为了研究混凝土细观三相材料中水泥砂浆的阻尼性能,通过配制几种混凝土,采用湿筛方法筛出粗骨料制作成水泥砂浆试件。利用模态测试方法测试其动态性能,获得水泥砂浆阻尼比的一些基础性数据。试验表明:湿筛水泥砂浆抗压强度比对应的混凝土高9%～33%,砂浆的阻尼比随抗压强度的增大而减小。
Some classed of concrete were made up and wet screened out coarse aggregate from concrete to make up specimen of cement mortar in order to study micro-concrete three-phase materials in the damping properties of cement mortar.A set of fundamental data are abtained for the damping ratio of cement mortar by modal testing technology.The analysis of experimental results indicate that:the compressive strength of cement mortar wet screened by concrete large 9%~33% than corresponding concrete;the damping ratio of cement mortar decreases with increasing compressive strength.
Some classed of concrete were made up and wet screened out coarse aggregate from concrete to make up specimen of cement mortar in order to study micro-concrete three-phase materials in the damping properties of cement mortar.A set of fundamental data are abtained for the damping ratio of cement mortar by modal testing technology.The analysis of experimental results indicate that:the compressive strength of cement mortar wet screened by concrete large 9%~33% than corresponding concrete;the damping ratio of cement mortar decreases with increasing compressive strength.
引文
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[3]WANGY,CHUNGDDL.Effects of sand and silica fume on the vibration damping behavior of cement[J].Cement and Concrete Research,1998,28(10):1353-1356.
[4]ORAK S.Investigation of vibration damping on polyemer concrete with polyster resin[J].Cement and Concrete Research,2000,30(2):171-174.
[5]WONG W G,FANG Ping,PAN J K.Polymer effects on the vibration dampingbehavior ofcement[J].Journal ofMaterials in Civil Engineering,ASCE,2003,1(5 6):554-556.
[6]YAN L,JENKINS C H,PENDLETON R L.Polyolefin fiber-reinforced concrete composites part I:damping and frequency characteristics[J].Cement and Concrete Research,2000,30(3):391-401.
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