Shear Strength Enhancement of Cemented Reinforced Sand: Role of Cement Content on the Macro-Mechanical Behavior
| Autor: | Ahmed Djafar Henni, Kheira Boutouba, Ismail Benessalah, Ahmed Arab |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
water content
Cement 010102 general mathematics cemented reinforced sand 0211 other engineering and technologies Engineering geology. Rock mechanics. Soil mechanics. Underground construction 02 engineering and technology direct shear test dilatant character Geotechnical Engineering and Engineering Geology 01 natural sciences Curing time curing time Mechanics of Materials Shear strength TA703-712 Direct shear test 0101 mathematics Computers in Earth Sciences Macro Composite material Porous medium Water content 021101 geological & geomatics engineering Civil and Structural Engineering |
| Zdroj: | Studia Geotechnica et Mechanica, Vol 41, Iss 4, Pp 200-211 (2019) |
| ISSN: | 2083-831X |
| DOI: | 10.2478/sgem-2019-0020 |
| Popis: | Sands reinforced by hydraulic binders (cement) have constituted in recent decades a major asset for the expansion of several areas of engineering. The mechanical behavior of sand-cement mixtures has undergone some controversies studied on the Chlef sand. In this paper, we present an experimental study to investigate the mechanical behavior of a sandy soil reinforced by a hydraulic binder (cement), using the direct shear apparatus emphasizing on the shear strength characteristics and the vertical deformation variation of cemented reinforced sand. The parameters used in this study are mainly: relative density (Dr = 80%), normal stress (σn = 100, 200, 400 kPa), water content (3, 7 and 10%), cement content (2.5, 5, 7.5 and 10 %) and cure time (7, 14 and 28 days). The experimental results show that the mechanical characteristics in terms of internal cohesion (C) and internal frication angle (φ) give a better mechanical performance with the binder inclusion, and the cure conditions play an effective role on the improvement of the shear strength. This result also showed that 10% of the cement content gave us a maximum value of shear strength and an optimal influence on the mechanical characteristics. The addition of cement not only improves the shear strength of soil, but also provides diversity in the resistance against the deformations imposed load, which can be established by a dilatant character. |
| Databáze: | OpenAIRE |
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