Abstract: The early strength of ecological slope-protected base material has an important influence on stability of base material onto slope and seed germination. Taking the unconfined compressive strength at 2 days of vegetation-growing concrete base material (VCBM) as research object, the characteristics of early strength of ecological slope-protected base material are studied. Through single factor affecting tests and orthogonal tests, which take cement dosage, organic matter dosage and water-cement ratio as influence factor, the analysis of tests data indicate: the three factors all affect the early strength of VCBM; and the degree follows by: cement dosage ＞ organic matter dosage ＞ water-cement ratio. When water-cement ratio is between 0.50 and 0.55, the early strength of VCBM reaches a maximum value. Regarding Cement dosage and organic matter dosage as independent variables on condition that water-cement ratio and other factors are constant, a multiple nonlinear regression model on the early strength of VCBM is established. And the confirmatory tests testify that the model could predict the early strength of VCBM approximately. According the model to estimating the minimum cement dosage and maximum organic matter dosage in course of the application of VCBM ecological slope-protected technology, it can ensure the stability of base material during early stage of implementation as well as propitious to vegetation recovery and sustained growth on slope in late stage

Key words: vegetation-growing concrete base material, early strength, influence factor, orthogonal test, regression model