Fine aggregates of construction waste and fly ash were selected as additives to modify the characteristics of Shanghai clayey soil as a composite. The laboratory tests on consistency index, maximum dry density, and unconfined compressive strength were carried out mainly for the purpose of comparing the modifying effect on the composite from fine aggregates of construction waste with that from fly ash. It is mainly concluded from test results that the liquid and plastic limit of the composites increase with the content of two additives. But their maximum dry density all decreases with the additive content. However, fine aggregates of construction waste can increase the optimum water content of the composites, while fly ash on the contrary. Finally, although the two additive all can increase the unconfined compressive strength of composites, fly ash has better effect. The current conclusions are also compared with previous studies, which indicates that the current research results are not completely the same as those from other researchers.

中文翻译：

---

建筑垃圾和粉煤灰细骨料改性的冲积砂土复合材料的表征与比较研究

选择建筑废料和粉煤灰的细骨料作为添加剂，以改变上海黏土的复合特性。对稠度指数，最大干密度和无侧限抗压强度进行了实验室测试，其主要目的是比较建筑垃圾细骨料和粉煤灰对复合材料的改性效果。从测试结果主要得出结论，复合材料的液体和塑性极限随两种添加剂的含量而增加。但是它们的最大干密度均随添加剂含量的降低而降低。然而，建筑废料的细小聚集体可以增加复合材料的最佳含水量，而粉煤灰则相反。最后，尽管这两种添加剂均可提高复合材料的无侧限抗压强度，粉煤灰效果更好。当前的结论也与以前的研究进行了比较，这表明当前的研究结果与其他研究人员的研究结果并不完全相同。