In those cases where construction-generated soils with high water contents are used as filling or embankment materials, it is sometimes difficult to satisfy the specified compaction degrees. Recently, soil stabilization using a paper sludge ash-based stabilizer (PSAS) has been developed. Paper sludge (PS) ash is waste generated by the incineration of PS discharged from paper mills. It has been found that PS ash can absorb and retain excess water; and therefore, PS ash can simultaneously improve the stability of muds when it is mixed with them. However, the current mixture design approach for PSAS-treated soils is only applicable to muds with water contents exceeding the liquid limits and cannot be applied to construction-generated soils in which the coarse fraction is dominant. Therefore, this study evaluated the effects of a PSAS on the compaction and mechanical characteristics of coarse-grained soils to use them as materials for irrigation earth dams. A series of compaction tests were conducted on two types of soil samples treated with a PSAS to investigate its effects on the compaction characteristics. The compaction characteristics obtained from the tests were assessed considering the water absorption and retention performance of the PSAS. It was found that the modified optimum water content w*_opt of the treated samples, which was evaluated using the amount of water unabsorbed and unretained by the PSAS, was almost equal to the w_opt of the untreated samples. Consequently, a new mixture design approach was proposed based on the compaction characteristics. The calculated results successfully demonstrated that, if the compaction curve of an untreated sample and the water absorption and retention ratio, W_ab, of the PSAS corresponding to a certain curing period are obtained, the range in the PSAS addition amount, A_PS^1m3, required to attain the targeted compaction degree, (D_c)_target, for the curing period can be estimated without conducting compaction tests on the treated samples. Finally, the strength characteristics of the treated samples prescribed by the proposed mixture design method were investigated by conducting CBR tests and $\overline{\text{CU}}$TC tests. Based on the test results, discussions were made on the contribution of the proposed mixture design to the strength development of the treated samples and on the development mechanism.

在将含水量高的施工产生的土壤用作填充或路堤材料的情况下，有时难以满足指定的压实度。最近，已经开发出使用纸污泥灰基稳定剂 (PSAS) 进行土壤稳定。造纸污泥 (PS) 灰分是焚烧造纸厂排放的 PS 所产生的废物。已经发现，PS 灰分可以吸收和保留多余的水分；因此，PS灰与泥浆混合可同时提高泥浆的稳定性。然而，目前 PSAS 处理土壤的混合设计方法仅适用于含水量超过液限的泥浆，不适用于粗粒占主导地位的建筑生成的土壤。所以，本研究评估了 PSAS 对粗粒土壤的压实和机械特性的影响，以将其用作灌溉土坝的材料。对用 PSAS 处理的两种土壤样品进行了一系列压实试验，以研究其对压实特性的影响。考虑到 PSAS 的吸水和保水性能，评估了从测试中获得的压实特性。发现改良后的最佳含水量 考虑到 PSAS 的吸水和保水性能，评估了从测试中获得的压实特性。发现改良后的最佳含水量 考虑到 PSAS 的吸水和保水性能，评估了从测试中获得的压实特性。发现改良后的最佳含水量使用 PSAS 未吸收和未保留的水量评估的处理样品的w * _opt几乎等于未处理样品的w _opt。因此，基于压实特性提出了一种新的混合料设计方法。计算结果成功地证明，如果得到未处理样品的压实曲线和一定固化时间对应的 PSAS 的吸水保水率W _ab，则 PSAS 添加量的范围A _PS ^1m3，需要达到目标压实度，（D _c）_目标, 因为无需对处理过的样品进行压实测试，即可估算固化时间。最后，通过进行 CBR 试验研究了所提出的混合物设计方法规定的处理样品的强度特性。$\overline{\text{CU}}$TC 测试。根据试验结果，讨论了所提出的混合物设计对处理样品强度发展的贡献和发展机制。