Major challenges are encountered when using high-water-content clays as construction materials owing to their low shear strength and high compressibility. Processes, such as sun drying and stabilization using chemical agents, can address the problems met with these clays during their conveyance and reuse. However, natural dehydration is a time-consuming process, and chemical stabilization can lead to an increase in the hydrogen ion index (pH) of the surrounding environment. Thus, the aim of this study is to improve the performance of high-water-content clay using a combination of green and byproduct materials, specifically bamboo chips and fly ash, which are cost-effective and eco-friendly. No previous study has attempted to design a mixture for the purpose of improving the performance of clay based on the water absorption and retention performance of stabilizers. In this study, the water absorption and retention rate (W_ab), which is the mass of the water absorbed and retained by 1 g of each stabilizer, was measured by removing the unabsorbed and unretained water through filtration under vacuum suction. A series of Cone Index tests were conducted on clay, separately treated with bamboo chips and fly ash, and the tests demonstrated a correlation among the Cone Index (q_c), W_ab, and amount of stabilizer added (A_st). A novel mixture design was proposed for hybrid-treated clay, using the two types of stabilizers in the composite, based on parameter β, which is defined as the sum of the product (W_ab/100)×(A_st/100) of each stabilizer used in the hybrid-treated clay. The results of the Cone Index tests performed on the hybrid-treated clay showed that the proposed mixture design can predict the combinations of certain amounts of each stabilizer needed to attain the target q_c with minimal errors. The results of pH measurement tests indicated that the hybrid-treated clays produced by the proposed mixture design were more eco-friendly than fly ash-treated clays. Furthermore, the theoretical maximum CO₂ fixation capacities of the hybrid-treated clays were evaluated to assess their feasibility as CO₂-fixing materials.

由于高含水粘土的低剪切强度和高压缩性，在使用高含水粘土作为建筑材料时遇到了重大挑战。晒干和使用化学试剂稳定化等工艺可以解决这些粘土在运输和再利用过程中遇到的问题。然而，自然脱水是一个耗时的过程，化学稳定会导致周围环境的氢离子指数（pH）增加。因此，本研究的目的是利用绿色和副产品材料（特别是竹片和粉煤灰）的组合来提高高含水粘土的性能，这些材料具有成本效益且环保。之前没有研究尝试设计一种混合物，以基于稳定剂的吸水和保水性能来改善粘土的性能。在本研究中，通过在真空抽吸下过滤除去未吸收和未保留的水来测量吸水率和保留率（W _{ab ），即1 g每种稳定剂吸收和保留的水的质量。}对分别用竹片和粉煤灰处理的粘土进行了一系列圆锥指数测试，测试表明圆锥指数（q _c）、W _ab和稳定剂添加量（A _st）之间存在相关性。针对混合处理粘土提出了一种新颖的混合物设计，在复合材料中使用两种类型的稳定剂，基于参数β ，该参数定义为 ( W _ab /100)×( A _st /100)的乘积之和混合处理粘土中使用的每种稳定剂。对混合处理粘土进行的圆锥指数测试结果表明，所提出的混合物设计可以预测达到目标q _c所需的每种稳定剂的一定量的组合，且误差最小。pH测量测试结果表明，通过所提出的混合物设计生产的混合处理粘土比粉煤灰处理粘土更加环保。此外，评估了混合处理粘土的理论最大CO _{2固定能力，以评估其作为CO 2}固定材料的可行性。