Bond performance of reinforcing bars in inorganic polymer concrete (IPC)
Bond performance of reinforcing bars in inorganic polymer concrete (IPC)
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DOI：
10.1007/s10853-006-0534-5
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发表时间：
2007-02
影响因子：
4.5
通讯作者：
M. Sofi;J. V. Deventer;P. Mendis;G. C. Lukey
中科院分区：
文献类型：
--
作者：
M. Sofi;J. V. Deventer;P. Mendis;G. C. Lukey
粉煤灰基无机聚合物混凝土（IPC）的基本力学和化学性能已得到广泛研究，但材料的关键工程和结构性能，例如弹性模量、压缩、拉伸、弯曲强度以及材料与钢筋的粘结强度却很少受到关注。增强 IPC 的结构应用取决于材料与增强材料的粘合性能。由于它们与普通硅酸盐水泥 (OPC) 基混凝土在化学反应和基体形成方面的差异，尚不清楚 IPC 是否与钢筋表现出不同的粘合性能。仅仅依靠材料的抗压强度以及针对 OPC 混凝土的外推模型和方程可能会导致结构构件的不安全设计。为此，测试了 27 个梁端样本、58 个立方直接拉拔型样本和多个实验室测试样本，以评估 IPC 与钢筋的粘合性能。梁端试样和直接拉拔型试样的结果具有良好的相关性，尽管直接拉拔试验的结果通常比梁端试样的结果更为保守。总体而言，可以得出结论，IPC 混合物的粘结性能与 OPC 混凝土相当，因此 IPC 和钢可以用作复合材料，除了抗压之外还可以抵抗拉力。
The basic mechanical and chemical properties of fly-ash-based inorganic polymer concretes (IPC) have been studied widely, but, key engineering and structural properties of the material for instance modulus of elasticity, compressive, tensile, flexural strengths and bonding strength of the material to reinforcement have received little attention. Structural applications of reinforced IPC depend on the bond performance of the material to the reinforcement. Due to their difference with ordinary Portland cement (OPC) based concrete in terms of chemical reaction and matrix formation it is not known whether IPC exhibit different bonding performance with the reinforcement. Simply relying on compressive strength of the material and extrapolating models and equations meant for OPC based concrete may lead to unsafe design of structural members. To that end, 27 beam-end specimens, 58 cubic direct pullout type specimens and number of laboratory test specimens were tested to evaluate bonding performance of IPC with reinforcement. The results of beam-end specimens and direct pullout type specimens correlate favourably, although the results of direct pullout tests are in general more conservative than those of beam-end specimens. Overall, it can be concluded that bond performance of IPC mixes are comparable to OPC based concrete and therefore IPC and steel can be used as a composite material to resist tension in addition to compression.