Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Microstructure and Strength Parameter of Cement Stabilized Loess

Version 1 : Received: 15 February 2023 / Approved: 22 February 2023 / Online: 22 February 2023 (06:59:38 CET)

A peer-reviewed article of this Preprint also exists.

Axel, M.; Li, X.; Wen, F.; An, M.-X. Microstructure and Strength Parameters of Cement-Stabilized Loess. Geotechnics 2023, 3, 161-178. Axel, M.; Li, X.; Wen, F.; An, M.-X. Microstructure and Strength Parameters of Cement-Stabilized Loess. Geotechnics 2023, 3, 161-178.

Abstract

In this study, cement is used as the component that provides the stabilizing effect in order to evaluate the hardness and stability of loess soil. To assess the strength characteristics of loess soil reinforced with cement, samples were created with four different cement contents and three different curing times. The materials were put through a series of tests to determine their flexural strength, direct shear strength, indirect tensile strength, and unconfined compressive strength. An appropriate cement dosage was found, in addition to a durability index that could be used to quantify the effect of water absorption investigations on cement-stabilized loess. Both of these discoveries were made simultaneously. Analyses of investigations such as scanning electron microscopy (SEM) and energy dispersive X-ray fluorescence spectrometry (XRF) examinations were carried out so that the fundamental mechanics of the materials could be comprehended. According to the findings, the cohesion of cement-stabilized loess is significantly more sensitive to structure than the friction angle of the material, and the cohesion is responsible for the increase in shear strength after remolding. To get the desired level of strength, it is necessary to adjust the cement's proportions. In addition, as the curing period progresses, we see an increase in the cement-stabilized loess's resistance and stiffness. This is because of the interactions that take place between the structure and the mineral composition. It is believed that this event was caused by the cementation that occurs naturally. As a consequence of this reaction, the production of new cementitious materials takes place. The cation exchange that causes the hydration and pozzolanic reaction that leads to the creation of aggregates and interparticle flocculation is responsible for their production. These findings suggest that cement may be utilized as a simple and effective method of loess stabilization, which will ultimately result in improved performance of the loess.

Keywords

Loess stabilization; Cement; Mechanical properties; Landslide; Microstructure

Subject

Engineering, Civil Engineering

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