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以50% ~60%的超细工业废渣取代水泥,用天然黄砂取代磨细石英砂,采用超细工业废渣多元复合技术,制备出生态型活性粉末混凝土(ECO RPC).研究了不同纤维掺量和不同养护龄期对ECO RPC静态力学性能的影响.采用霍普金森杆方法研究了高速冲击下应变速率对ECO RPC动态力学性能的影响.结果表明,随着纤维掺量和养护龄期的增加,ECO RPC各项静态力学性能不断提高.通过超细粉煤灰(25% )、超细矿粉(25% )和硅灰(10% )三掺制备的ECO RPC性能最佳,其抗压强度、抗折强度和断裂能分别达到200MPa, 60MPa和30kJ/m2 以上.ECO RPC具有明显的应变率强化效应,随着应变率的提高,峰值应力及峰值应变显著增长,应力应变曲线所包围的面积不断增大,破坏特征从脆性转变为韧性.
ECO RPC was prepared by substituting 50% -60% ultrafine industrial waste residue for cement, replacing natural quartz sand with fine quartz sand, and using ultrafine industrial waste multi-component composite technology to prepare eco-friendly reactive powder concrete (ECO RPC) And different curing ages on the static mechanical properties of ECO RPC.The effect of strain rate on the dynamic mechanical properties of ECO RPC was investigated by Hopkinson bar method.The results showed that with the increase of fiber content and curing age , The static mechanical properties of ECO RPC are continuously improved.The ECO RPC prepared by ultrafine fly ash (25%), ultrafine slag (25%) and silica fume (10% The strength, the flexural strength and the fracture energy reach 200MPa, 60MPa and 30kJ / m2, respectively.ECO RPC has obvious strain rate strengthening effect, with the increase of strain rate, the peak stress and peak strain increase significantly, and the stress- Increasing the area, the destruction of characteristics from brittle to toughness.