钢筋混凝土梁的性能与地聚合物混凝土的力学性能

IF 0.7 Q4 ENGINEERING, CIVIL International Journal of Structural Engineering Pub Date : 2023-01-01 DOI:10.1504/ijstructe.2023.134224
Hisham Y. Makahleh, Haitham A. Badrawi
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引用次数: 0

摘要

探讨了粉煤灰和矿渣粉替代普通硅酸盐水泥对混凝土新鲜性能和力学性能以及钢筋混凝土梁性能的影响。对照混合料和两种地聚合物混凝土(GPC)混合料分别使用50%的GGBFS和50%的粉煤灰,以及70%的GGBFS和30%的粉煤灰浇筑189个样品。试验表明,经过56天的养护,GPC试样达到设计抗压强度。此外,与传统混凝土相比,GPC表现出更好的耐久性。通过对钢筋混凝土梁的试验,得出了GPC具有更强延性的结论。最后,GPC RC梁经历了预期的破坏模式,即受弯试件经历了受拉控制的破坏模式,剪切试件呈现了从加载点向支架扩展的斜裂缝。
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Behaviour of RC beams and mechanical properties of geopolymer concrete
The effects of substituting ordinary Portland cement (OPC) with fly ash and ground granulated blast furnace slag (GGBFS) on fresh and mechanical properties of concrete and the behaviour of reinforced concrete (RC) beams are explored. A control mix and two geopolymer concrete (GPC) mixes using 50% GGBFS and 50% fly ash for the first and 70% GGBFS and 30% fly ash for the second were used to cast 189 samples. Testing revealed that GPC samples reached the design compressive strength after 56 days of curing. Moreover, GPC demonstrated better durability when compared to conventional concrete. Upon testing of RC beams, it was concluded that GPC exhibits more ductility. Finally, GPC RC beams experienced the expected failure mode, i.e., flexural testing samples experienced a tension-controlled failure mode and shear testing samples exhibited a diagonal crack that propagated from the loading point to the support.
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来源期刊
International Journal of Structural Engineering
International Journal of Structural Engineering Engineering-Civil and Structural Engineering
CiteScore
2.40
自引率
23.10%
发文量
24
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