Mechanical Properties and Durability of Iron Tailings Concrete
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摘要:
这是一篇陶瓷及复合材料领域的论文。为了研究铁尾矿混凝土在受硫酸钠溶液干湿循环作用后的力学特性和耐久性，开展了受硫酸钠溶液侵蚀混凝土的抗压实验、抗氯离子侵蚀实验、抗冻实验和水化特性实验，分析不同铁尾矿掺量、干湿循环次数、溶液浓度对混凝土力学性质和耐久性的影响。结果表明：在铁尾矿掺量为30%、干湿循环次数为60次和硫酸钠浓度为5%时，混凝土的质量损失率较小而抗压强度耐腐蚀系数较大。随着铁尾矿掺量的不断增大，混凝土的抗氯离子侵蚀性能、抗冻性能越好，水化反应放热量不断减小。
Abstract:This is an article in the field of ceramics and composites. In order to study the mechanical properties and durability of iron tailings concrete after being subjected to the dry-wet cycle of sodium sulfate solution, the compressive test, chloride ion corrosion test, frost resistance test and hydration characteristics test of the concrete eroded by sodium sulfate solution are carried out. The effects of different iron tailings content, number of dry and wet cycles, and solution concentration on the mechanical properties and durability of concrete are analyzed. The results show that when the iron tailings content is 30%, the number of dry and wet cycles is 60 times, and the sodium sulfate concentration is 5%, the mass loss rate of concrete is the smallest and the compressive strength and corrosion resistance coefficient is the largest. As the content of iron tailings continues to increase, the better the corrosion resistance and frost resistance of concrete will be and the heat of hydration reaction decreases.
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