Bond strength between blended slag and Class F fly ash geopolymer concrete with steel reinforcement
Bond strength between blended slag and Class F fly ash geopolymer concrete with steel reinforcement
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DOI：
10.1016/j.cemconres.2015.02.016
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发表时间：
2015-06-01
影响因子：
11.4
通讯作者：
Foster, Stephen J.
中科院分区：
文献类型：
--
作者：
Castel, Arnaud;Foster, Stephen J.
在本文中，使用标准 RILEM 拉拔试验研究了地质聚合物混凝土与变形钢筋和光滑钢筋的粘结。地质聚合物粘结剂由 85.2% 的低钙粉煤灰和 14.8% 的粒状高炉矿渣粉 (GGBFS) 组成。测试的目的是评估浇注后 24 小时至 28 天在不同热固化条件下粘合强度的发展情况。结果表明，需要在 80 摄氏度下热养护 48 小时才能获得与参考 45 MPa OPC 混凝土相似或更好的性能。地质聚合物混凝土的 28 天粘结强度和整体粘结应力滑移行为与之前报道的 OPC 混凝土相似。通过强化热固化，可以实现较高的早期粘结强度，这表明 F 级粉煤灰地质聚合物混凝土非常适合预制应用。 (C) 2015 Elsevier Ltd. 保留所有权利。
In this paper, geopolymer concrete bond with both deformed and smooth reinforcing steel bars is investigated using the standard RILEM pull-out test. The geopolymer binder is composed of 85.2% of low calcium fly ash and 14.8% of ground granulated blast furnace slag (GGBFS). The tests were aimed to assess the development of the bond strength from 24 h to 28 days after casting, with different heat curing conditions. The results show that 48 h of heat curing at 80 degrees C is required in order to obtain similar or better performances to those of the reference 45 MPa OPC concrete. The 28-day bond strength and the overall bond stress-slip behaviour of the geopolymer concrete were similar to those previously reported for OPC-based concretes. Providing intensive heat curing, high early bond strength can be achieved showing that Class F fly ash geopolymer concrete is well suited for precast applications. (C) 2015 Elsevier Ltd. All rights reserved.