Characterization and prediction for the strength development of cement stabilized dredged sediment

Cement stabilized clay (CSC) from dredged sediment or sludge is receiving increasing attention for its use as construction material. In this paper, seven CSC mixture samples were tested to investigate the effect of constituent proportion parameters and curing time (T) on strength characteristics. Results illustrate that clay-water/cement ratio (W/C) is significantly related to the unconfined compression strength (q(u)) of CSC. This relationship can be expressed by power function with a great degree of accuracy. After fitting and modeling the test data, two experiential formula models for the characterization of CSC strength are developed, which contain multiple parameters without other variable coefficients or parameters. Finally, methods derived from two experiential formulas to estimate the CSC strength under various parameter variables are proposed, and the prediction accuracy evaluation of derivation data and validation data are analyzed.