Strength Index and Dynamic Characteristics of Low Content Cement Stabilized Laterite Granules

Abstract

Abstract: The aim of this study is to find a more reasonable evaluation method for the strength index and dynamic characteristics of cement stabilized laterite granules. Different strength indexes and dynamic characteristics of cement stabilized laterite granules with low content (2.5% and 4.0%, mass fraction) were investigated. Compressive, tensile strength and dynamic modulus tests of low content cement stabilized laterite granules were carried out. The laws of strength, dynamic modulus and phase angle influenced by different factors were analyzed. The relational model with different strength indexes and dynamic modulus dependence model of cement stabilized laterite granules were developed. The results show that there are significant differences in the tensile and compressive strength of cement stabilized laterite granules under different stress modes, and the compressive strength is significantly greater than the tensile strength. For cement stabilized laterite granules, the compressive strength > flexural strength > splitting strength > direct tensile strength, and there is a significant linear relationship between strength indexes. It is possible to evaluate the tensile strength properties of cement stabilized laterite granules using compressive strength, flexural strength or splitting strength instead of direct tensile strength. The low content cement stabilized laterite granules is a kind of non linear elastic material, and its dynamic parameters have significant dependence on stress and frequency. Specifically, with the increase of stress and frequency, the dynamic modulus increases in S-shape, while the phase angle decreases gradually and increases first and then decreases, respectively. The dynamic modulus dependence model of cement stabilized laterite granules base on stress level and loading frequency reflects the nonlinear response characteristics more realistically and accurately obtains the modulus values of such materials.

Key words: cement stabilized laterite granule, strength index, phase angle, dynamic characteristic, nonlinearity, dependent model

CLC Number:

U414.3

LI Qianqian, WANG Xudong. Strength Index and Dynamic Characteristics of Low Content Cement Stabilized Laterite Granules[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(9): 3402-3411.

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