Wang Xinyu, Xiong Yuanliang, Zhang Chunfei, Wang Yuanjing, Liu Bo, Liu Yuming
School of Civil Engineering, Yantai University, Yantai, 264005, China.
China Communications Construction (Nanjing) Co., Ltd, Nanjing, 211189, China.
Sci Rep. 2025 Feb 12;15(1):5189. doi: 10.1038/s41598-025-88404-7.
The present investigation is dedicated to exploring the potential of utilizing gold tailings to enhance the performances of foam concrete. Tests to assess foam stability and compressive strength have been performed. The inherent yield stress exhibited by the matrix is utilized as a metric to evaluate the foam stability of the foamed concrete. Compressive strength of matrix and density ratio are employed to analyze and predict the strength of foam concrete. The experimental findings unveil that mechanical performances of foam concrete can be augmented through the incorporation of an optimal quantity of gold tailings. This enhancement can be attributed to the development of a more compact and less permeable microstructure. However, it should be noted that the inclusion of gold tailings may also have an adverse effect on the foam stability of foamed concrete. This is due to their ability to enhance the fluidity and decrease the yield stress of the base mix, thereby reducing the overall stability of the foam concrete. The main control factors of foam concrete strength are determined by using the prediction model. Compared with the foam stability, the enhancement in compressive strength of base mix, coupled with a consistent density ratio may account for the enhancement of compressive strength in foam concrete.
本研究致力于探索利用金矿尾矿提高泡沫混凝土性能的潜力。已进行了评估泡沫稳定性和抗压强度的试验。基体表现出的固有屈服应力被用作评估泡沫混凝土泡沫稳定性的指标。采用基体抗压强度和密度比来分析和预测泡沫混凝土的强度。实验结果表明，通过掺入适量的金矿尾矿，可以提高泡沫混凝土的力学性能。这种增强可归因于形成了更致密、渗透性更低的微观结构。然而，应注意的是，金矿尾矿的掺入也可能对泡沫混凝土的泡沫稳定性产生不利影响。这是因为它们能够提高基础混合料的流动性并降低屈服应力，从而降低泡沫混凝土的整体稳定性。利用预测模型确定了泡沫混凝土强度的主要控制因素。与泡沫稳定性相比，基础混合料抗压强度的提高以及一致的密度比可能是泡沫混凝土抗压强度提高的原因。
