| 养护期间持续增加的压应力作用混凝土力学性能 |
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| 引用本文： | 王军,柏云,李忠梅,鞠泽青.养护期间持续增加的压应力作用混凝土力学性能[J].科学技术与工程,2013,13(22):6621-6624. |
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| 作者姓名： | 王军 柏云 李忠梅 鞠泽青 |
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| 作者单位： | 山东理工大学建筑工程学院,山东理工大学建筑工程学院,山东理工大学建筑工程学院,山东理工大学建筑工程学院 |
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| 基金项目： | 山东省自然科学基金(ZR2011EL010);山东理工大学青年教师发展支持计划经费资助 |
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| 摘 要： | 制作混凝土试件在其养护期间对试件施加不同等级压应力,测试28天试件的抗压强度抗折强度及动弹性模量,计算损伤变量,并与自然养护下混凝土试件的力学性能进行比较,采用扫描电镜观察试件微观结构。试验结果表明养护期间受到不同等级的压应力作用对混凝土28天的力学性能产生影响,存在一个临界损伤强度值;当混凝土受到低于临界损伤强度的压应力作用,28天力学性能起增强作用;超过该值力学性能降低。电镜扫描表明受损伤混凝土内部微裂纹增多,界面过渡区是裂纹集中区域。
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| 关 键 词： | 养护期 混凝土 压应力 力学性能 临界损伤强度 |
| 收稿时间： | 2013/4/18 0:00:00 |
| 修稿时间： | 2013/4/18 0:00:00 |
Mechanics Performances of Concrete under Sustained Increased Compress Loading during Curing Time |
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| Wangjun,Baiyun,Lizhongmei and Juzeqing.Mechanics Performances of Concrete under Sustained Increased Compress Loading during Curing Time[J].Science Technology and Engineering,2013,13(22):6621-6624. |
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| Authors: | Wangjun Baiyun Lizhongmei and Juzeqing |
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| Institution: | (School of Architecture Engineering,Shandong University of Technology,Zibo 255049,P.R.China) |
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| Abstract: | Designed experiment adopted concrete specimens under varieties level sustained compressure during 28 days of curing time was done. The compressive strength,bending strength,dynamic modulus and damage degree of specimens after 28 days curing were analyzed,compared with the datas of specimens in nature curing.The microstructure was observed by scanning electron microscopy.The results show that the mechanics properties are influenced after 28 curing days under sustained compress stress-strength ,which exists the critical damage strength.The mechanics properties woud increase under the critical damage strength,over which it could decrease.The miccracks in specimens increase over critical damage strength,where located in interfacial zones. |
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| Keywords: | curing time concrete compressive mechanics properties critical damage strength |
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