Influence of the Amount of Activated Gold Tailings on the Mechanical Properties and Microstructural Properties of Concrete
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摘要:
这是一篇陶瓷及复合材料领域的论文。为了研究活性金尾矿掺量对混凝土力学性能、微观结构性能和水化性能的影响，开展了不同掺量金尾矿混凝土的力学性能、XRD、TG-DTG和水化特性实验。结果表明：在粉磨时间为30 min时，金尾矿的比表面积达到了极大值以及其晶体结晶化度达到了极小值。而在金尾矿掺量为30%时，混凝土的基本力学和物理性能达到较佳状态；且掺入活性金尾矿混凝土的微观结构性能、水化放热速率和放热量均优于掺入非活性金尾矿混凝土的微观结构性能、水化放热速率和放热量。随着金尾矿粉磨时间的不断增大，金尾矿粒度累积曲线的变化规律都呈现先增大后趋于稳定的趋势，且随着粉磨时间的不断增大，金尾矿粒度累积越来越大。
Abstract:This is an essay in the field of ceramics and composites. In order to study the effect of activated gold tailings content on the mechanical properties, microstructural properties and hydration properties of concrete, the mechanical properties, XRD, TG-DTG and hydration characteristics tests of different content of gold tailings concrete were carried out. The results showed that when the grinding time was 30 min, the specific surface area of the gold tailings reached the maximum and the crystallinity reached the minimum. When the content of gold tailings was 30%, the basic mechanical and physical properties of concrete reached the best state. In addition, the microstructure performance, hydration heat release rate and heat release of concrete mixed with active gold tailings are better than those of concrete mixed with inactive gold tailings. With the continuous increase of the grinding time of gold tailings, Changing law of the cumulative curve of gold tailings particle size showed a trend of first increasing and then becoming stable. And with the continuous increase of grinding time, the accumulation of gold tailings particle size was getting larger and larger.
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表 1 原料主要化学成分/%
Table 1. Main chemical composition of the materials
Al2O3 SiO2 Fe2O3 MgO Na2O CaO K2O 其他氧化物 12.36 74.18 2.98 0.41 2.57 1.21 4.63 1.66 
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表 2 粉煤灰的主要化学成分/%
Table 2. Main chemical composition of the fly ash
Al2O3 SiO2 Fe2O3 MgO Na2O CaO K2O S 其他氧化物 38.47 56.32 1.63 0.78 0.22 1.35 0.12 0.24 0.60
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