Uniaxial compressive strength prediction of cement-treated granular soils

Grouting is one of the most commonly used techniques for improving mechanical and physical properties of in situ soils. Predicting the strength of cement-treated soils reduces uncertainties associated with quality control and the number of trial samples. The paper describes an empirical strength prediction model for cement-treated granular soils, which takes into consideration, the combined effect of curing time and cement/soil (C/S) ratio. The model is developed using a series of unconfined uniaxial compressive strength test results of soil samples obtained along line 1 of Tehran's Metro. Unlike the current strength prediction models, the model proposed in this study covers a wide range of grain-size distribution, which is very common in the field. The results of non-linear regression analyses of laboratory tests, with careful consideration, indicate the validity of the model proposed.