In this paper, the one-part alkali-activated geopolymer was adopted as the soil binder to stabilize the soft clay under the one-dimensional compressive loading. Factors influencing the stiffness and strength of the one-part geopolymer stabilized soil such as the proportion of silicon-aluminum raw materials, the mass ratio of solid NaOH (NH) to raw materials and the water-binder ratio were taken into account. The stiffness development of the one-part geopolymer stabilized soft clay under one-dimensional compressive loading was investigated by an improved transducer system equipped with a pair of bender extender elements and the tactile pressure sensor, from which the time history of earth pressure coefficient (i.e., K₀) and elastic wave velocity (i.e., the compression wave velocity V_P and the shear wave velocity V_S) of the stabilized soil sample could be measured, respectively. Furthermore, the unconfined compressive strength (UCS) of the stabilized soil sample cured under varied one-dimensional compressive loadings was tested to reveal the strength development of the geopolymer stabilized soil sample. Among different mixing proportions, the alkali-activated binary precursor [90% ground granulated blast furnace slag (GGBFS) and 10% fly ash (FA)] exhibits the highest performance in terms of the V_S, V_P and UCS of the geopolymer stabilized soil sample when the activator/precursor and water/solid ratio are 0.15 and 0.7 (i.e., the 4.67 mol/L of NH solution), respectively. The prediction of UCS for the one-part geopolymer stabilized soft clay was proposed and established based on the elastic wave velocity (i.e., V_S and V_P). The outcome of the current study sheds light on the practical use of the one-part alkali-activated geopolymer as a soil binder in ground improvement.

在本文中，采用单组分碱活化地质聚合物作为土壤粘合剂，以在一维压缩载荷下稳定软粘土。考虑了硅铝原料比例、固体氢氧化钠(NH)与原料的质量比、水胶比等影响单组分地质聚合物稳定土刚度和强度的因素。通过配备一对弯曲扩展器元件和触觉压力传感器的改进换能器系统研究了单组分地质聚合物稳定软粘土在一维压缩载荷下的刚度发展，从中土压力系数的时间历程（即, K ₀ ) 和弹性波速度（即压缩波速度V可以分别测量稳定土壤样品的_P和横波速度V _S。此外，测试了在不同一维压缩载荷下固化的稳定土壤样品的无侧限抗压强度 (UCS)，以揭示地质聚合物稳定土壤样品的强度发展。在不同的混合比例中，碱活化的二元前驱体 [90% 磨碎的高炉矿渣 (GGBFS) 和 10% 粉煤灰 (FA)] 在V _S、V _P方面表现出最高的性能当活化剂/前体和水/固比分别为 0.15 和 0.7（即 4.67 mol/L NH 溶液）时，地质聚合物稳定的土壤样品的 UCS 和 UCS。提出并建立了基于弹性波速度（即V _S和V _P）的单组分地质聚合物稳定软粘土 UCS 预测。当前研究的结果阐明了单组分碱活化地质聚合物在地面改良中作为土壤粘合剂的实际用途。