Effect of temperature on bond characteristics of geopolymer concrete
Effect of temperature on bond characteristics of geopolymer concrete
复制标题
温度对地质聚合物混凝土粘结特性的影响
DOI：
10.1016/j.conbuildmat.2017.12.043
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发表时间：
2018-02
影响因子：
7.4
通讯作者：
Yan Jia
中科院分区：
文献类型：
--
作者：
Zhang Hai Yan;Kodur Venkatesh;Wu Bo;Yan Jia
本文介绍了地聚合物混凝土与钢筋粘结性能的试验结果。在环境温度下以及暴露于100、300、500和700 °C后，对埋入普通钢筋和带肋钢筋的地质聚合物混凝土试样进行拉拔试验。使用两批抗压强度分别为48和64 MPa的地质聚合物混凝土和五种钢筋直径（10、12、14、18和25 mm）来制备试样。对比基准测试也进行了普通波特兰水泥（OPC）混凝土试样。这些测试的结果表明，地质聚合物混凝土在暴露于300 °C之前表现出粘结强度的轻微降低，但在超过300 °C时发生显著降解。试验结果表明，地聚合物混凝土的粘结强度退化速率与劈拉强度退化速率接近，但高于抗压强度退化速率。此外，结果推断，地质聚合物混凝土表现出类似或更好的粘结性能比OPC混凝土，无论是在环境温度下，暴露于高温后。因此，当耐火性是主要设计考虑因素之一时，地质聚合物混凝土可以成为钢筋混凝土结构中OPC混凝土的实用替代品。
This paper presents experimental results on the bond behavior between geopolymer concrete and rebar. Pull-out tests on geopolymer concrete specimens embedded with plain and ribbed rebars were carried out at ambient temperature and after exposure to 100, 300, 500 and 700 °C. Two batches of geopolymer concrete with compressive strength of 48 and 64 MPa respectively, and five rebar diameters (of 10, 12, 14, 18 and 25 mm) were used for preparing the test specimens. Comparative benchmark tests were also conducted on ordinary Portland cement (OPC) concrete specimens. Results from these tests show that geopolymer concrete exhibits insignificant reduction in bond strength till exposure to 300 °C, but undergoes significant degradation beyond 300 °C. Data from the tests indicate that rate of bond strength degradation in geopolymer concrete is close to that of splitting tensile strength, but higher than that of compressive strength. Also, results infer that geopolymer concrete exhibits similar or better bond properties than OPC concrete, both at ambient temperature and after exposure to elevated temperatures. Thus geopolymer concrete can be a practical alternative to OPC concrete in reinforced concrete structures when fire resistance is one of the main design considerations.
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影响因子：
8.4
作者：
Smith Songpiriyakij;T. Pulngern;Pompong Pungpremtrakul;C. Jaturapitakkul
通讯作者：
Smith Songpiriyakij;T. Pulngern;Pompong Pungpremtrakul;C. Jaturapitakkul
影响因子：
8.4
作者：
Sarker, Prabir Kumar;Kelly, Sean;Yao, Zhitong
通讯作者：
Yao, Zhitong
DOI：
10.1007/bf01904446
发表时间：
1989-03-01
期刊：
JOURNAL OF THERMAL ANALYSIS
影响因子：
--
作者：
DAVIDOVITS, J
通讯作者：
DAVIDOVITS, J
影响因子：
4.5
作者：
M. Sofi;J. V. Deventer;P. Mendis;G. C. Lukey
通讯作者：
M. Sofi;J. V. Deventer;P. Mendis;G. C. Lukey
影响因子：
11.4
作者：
Castel, Arnaud;Foster, Stephen J.
通讯作者：
Foster, Stephen J.