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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 ～１００ ＭＰａ， 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ｆ′ｃ ≤６０ ＭＰａ 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．
Based on the standard test method recommended by RILEM, this paper systematically studied the effect of age and strength on the fracture energy GF of concrete by using three-point incision beam specimens. The compressive strength of the specimen varies from 30 to 100 MPa, and the age range varies from 7 to 180 days. The results show that the fracture energy GF of NSC and MSC increases slightly with the increase of age and intensity, which is obvious in the range of 28 ~ 90d and f’c≤60 MPa. The fracture energy of HSC tends to increase with age and intensity The value is 103 to 142 N / m, and has a small value.