Abstract

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.

1. Highlights

2. Relationship of CSC strength and clay-water/cement ratio can be expressed by a power function.

3. Strength coefficients are modeled with the moisture content of clay and the curing time.

4. Prediction model are developed to estimate CSC strength under various parameters without variable coefficients.

5. Estimation results correspond well with the actual measured strength.

摘要

来自疏浚沉积物或污泥的水泥稳定粘土 (CSC) 因其用作建筑材料而受到越来越多的关注。在本文中，测试了七个 CSC 混合物样品，以研究成分比例参数和固化时间 ( T ) 对强度特性的影响。结果表明，粘土水灰比（W/C）与无侧限抗压强度显着相关（$q_{你}$) 的 CSC。这种关系可以用幂函数非常准确地表达。在对试验数据进行拟合和建模后，建立了两个表征CSC强度的经验公式模型，其中包含多个参数，没有其他可变系数或参数。最后，提出了两种经验公式推导的方法，用于估计各种参数变量下的CSC强度，并分析了推导数据和验证数据的预测精度评估。

1. 强调

2. CSC 强度和粘土-水/水泥比的关系可以用幂函数表示。

3. 强度系数用粘土的水分含量和固化时间建模。

4. 开发了预测模型以在没有可变系数的情况下估计各种参数下的 CSC 强度。

5. 估计结果与实际测量的强度非常吻合。