Abstract: A large amount of waste sludges are generated in the urban construction in China. Considering the reuse of waste sludge resources, a series of cement-soil mixed samples were prepared, and the unconfined compressive strength tests were performed for the engineering waste sludge in Funing area. The influencing factors and the strength failure mechanism were evaluated, and a series of test data were provided for the treatment method and the resource utilization of waste sludge. The test results show that the change of cement mixing ratio and curing age have a certain influence on the preparation of the waste sludge samples. When the cement content remains constant, the curing age increases, and the unconfined compressive strength of the specimen also increases. At the same time, the fitted curve shows that the strength increases linearly. With the same curing age, with the increase of cement content, the unconfined compressive strength of cement soil samples also increases and shows obvious linear relationship. In addition, if the cement content is low, the failure strain is small, and the failure mode is plastic failure. When the cement content is high, the failure strain increases, and the mode shows a trend of brittle failure.

Key words: Waste Sludge, Cement Mixing Ratio, Curing Age, Resource Utilization, Unconfined Compressive Strength