| 栾曙光,David Darwin.混凝土断裂能GF随龄期、强度的变化规律[J].水利学报,1999,30(10):0029-0033 |
| 混凝土断裂能GF随龄期、强度的变化规律 |
| Effect of age and strength on fracture energy of concrete |
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| DOI： |
| 中文关键词: 断裂能 强度 龄期 |
| 英文关键词: fracture energy strength age |
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| 中文摘要: |
| 本文依据RILEM推荐的标准试验方法，针对龄期和强度对混凝土断裂能GF的影响采用三点弯切口梁试件进行了系统的试验研究。试件的抗压强度变化范围为30-100MPa，龄期变化范围为7-180d.研究结果表明，NSC和MSC断裂能GF随龄期、强度增长略有增长，在28-90d和fc≤60MPa区间内较为明显；HSC断裂能GF随龄期、强度的增长趋于一定值103-142N/m，且具有较小值。 |
| 英文摘要: |
| According to the standard test method recommended by RILEM, a systematic study on the effect of age and strength on fracture energy of concrete is carried out. Notched beam specimens are adopted in three point bending test. The strength in the test is in the range of 30 to 100 MPa, while the age is from 7 to 180d. The study result shows that the fracture energy GF will slightly increase with the increase of concrete age and strength during age from 28 to 90d and strength f'c≤60MPa for NSC and MSC. It approaches a constant in the range of 103 142N/m. |
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