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| 杠杆卧拉式徐变装置测定混凝土早期徐变试验研究 |
| Experimental Research of Concrete Early Creep by Using the Lever Device |
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| DOI：10.3969/j.issn.1671-5322.2012.03.004 |
| 中文关键词: 混凝土 早龄期 徐变 试验 |
| 英文关键词: concrete early age creep experiment |
| 基金项目: |
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| 中文摘要: |
| 设计杠杆卧拉式混凝土徐变测定装置，并利用该装置测定早龄期混凝土在不同龄期的木伸弹性模量、徐变以及拉伸强度，验证装置在测定混凝土早龄期徐变、弹性模量等参数的可手性。试验研究表明，采用该装置不仅可以测定混凝土的早龄期徐变、弹性模量，还具有不需要瘊压装置保持测定荷载恒定不变的优点。研究表明，在相同条件下，进行了徐变测定的混凝土相限抗拉强度低于非徐变混凝土试件，加载龄期越早，极限抗拉强度降低幅度越大，证明了徐变声于混凝土的承载强度有一定的削弱作用。 |
| 英文摘要: |
| The lever concrete creep device was designed and was used to measure the tensile elastic modulus of the early age concrete creep and tensile strength.Meanwhile,the using of the device to test the parameters has been authenticated.Experiment shows that the usage of the device not only can determine the early age of concrete creep,elastic modulus,but also can maintain constant loads without stabilized device.Research shows that under the same conditions,the ultimate tensile strength of the concrete which were measured creep should be lower than than that of non-creep of concrete.The earlier the loaded age,the greater decreased of ultimate tensile strength.It indicats that the creep of concrete has a certain weakening effect on concrete bearing strength. |
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