Ahn Seongnoh, Ryou Jae-Eun, Ahn Kwangkuk, Lee Changho, Lee Jun-Dae, Jung Jongwon
School of Civil Engineering, Chungbuk National University, Cheongju 28644, Korea.
Department of Civil Engineering, Chonnam National University, Gwangju 61186, Korea.
Materials (Basel). 2021 May 22;14(11):2743. doi: 10.3390/ma14112743.
Ground reinforcement is a method used to reduce the damage caused by earthquakes. Usually, cement-based reinforcement methods are used because they are inexpensive and show excellent performance. Recently, however, reinforcement methods using eco-friendly materials have been proposed due to environmental issues. In this study, the cement reinforcement method and the biopolymer reinforcement method using sodium alginate were compared. The dynamic properties of the reinforced ground, including shear modulus and damping ratio, were measured through a resonant-column test. Also, the viscosity of sodium alginate solution, which is a non-Newtonian fluid, was also explored and found to increase with concentration. The maximum shear modulus and minimum damping ratio increased, and the linear range of the shear modulus curve decreased, when cement and sodium alginate solution were mixed. Addition of biopolymer showed similar reinforcing effect in a lesser amount of additive compared to the cement-reinforced ground, but the effect decreased above a certain viscosity because the biopolymer solution was not homogeneously distributed. This was examined through a shear-failure-mode test.
地面加固是一种用于减少地震造成损害的方法。通常使用水泥基加固方法，因为它们成本低廉且性能优异。然而，最近由于环境问题，已经提出了使用环保材料的加固方法。在本研究中，对水泥加固方法和使用海藻酸钠的生物聚合物加固方法进行了比较。通过共振柱试验测量了加固地面的动态特性，包括剪切模量和阻尼比。此外，还对作为非牛顿流体的海藻酸钠溶液的粘度进行了研究，发现其随浓度增加而增大。当水泥与海藻酸钠溶液混合时，最大剪切模量和最小阻尼比增大，且剪切模量曲线的线性范围减小。与水泥加固地面相比，添加生物聚合物在较少添加剂用量时显示出类似的加固效果，但在超过一定粘度时效果会降低，因为生物聚合物溶液分布不均匀。这通过剪切破坏模式试验进行了检验。
