Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Strength and mechanical behavior of short polypropylene fiber reinforced and cement stabilized clayey soil
An experimental program was undertaken to investigate the effects of discrete short polypropylene fibre (PP-fibre) on the strength and mechanical behaviour of uncemented and cemented clayey soil. In the present investigation, 12 groups of soil samples were prepared at three different percentages of PP-fibre content (i.e. 0.05 %, 0.15 % and 0.25 % by weight of soil) and two different percentages of cement content (i.e. 5 % and 8 % by weight of soil), and unconfined compression and direct shear tests were carried out after 7-, 14- and 28-day curing periods. The test results indicated that the inclusion of fibre reinforcement within uncemented and cemented soil caused an increase in the unconfined compressive strength (UCS), shear strength and axial strain at failure, decreased the stiffness and the loss of post-peak strength, and changed the cemented soil's brittle behaviour to a more ductile one. The interactions at the interface between fibre surface and soil matrix were analyzed by using scanning electron microscopy (SEM). It is found that the bond strength and friction at the interface seem to be the dominant mechanism controlling the reinforcement benefit. The behaviour at the interface in fibre-reinforced uncemented soil was different from that in fibre-reinforced cemented soil. The micromechanical properties of fibre/matrix interface were influenced by several factors, e.g. binding materials in soil, normal stress around the fibre body, effective contact area of the interface and fibre surface roughness, etc.
Strength and mechanical behavior of short polypropylene fiber reinforced and cement stabilized clayey soil
An experimental program was undertaken to investigate the effects of discrete short polypropylene fibre (PP-fibre) on the strength and mechanical behaviour of uncemented and cemented clayey soil. In the present investigation, 12 groups of soil samples were prepared at three different percentages of PP-fibre content (i.e. 0.05 %, 0.15 % and 0.25 % by weight of soil) and two different percentages of cement content (i.e. 5 % and 8 % by weight of soil), and unconfined compression and direct shear tests were carried out after 7-, 14- and 28-day curing periods. The test results indicated that the inclusion of fibre reinforcement within uncemented and cemented soil caused an increase in the unconfined compressive strength (UCS), shear strength and axial strain at failure, decreased the stiffness and the loss of post-peak strength, and changed the cemented soil's brittle behaviour to a more ductile one. The interactions at the interface between fibre surface and soil matrix were analyzed by using scanning electron microscopy (SEM). It is found that the bond strength and friction at the interface seem to be the dominant mechanism controlling the reinforcement benefit. The behaviour at the interface in fibre-reinforced uncemented soil was different from that in fibre-reinforced cemented soil. The micromechanical properties of fibre/matrix interface were influenced by several factors, e.g. binding materials in soil, normal stress around the fibre body, effective contact area of the interface and fibre surface roughness, etc.
Strength and mechanical behavior of short polypropylene fiber reinforced and cement stabilized clayey soil
Festigkeit und mechanisches Verhalten von mit Polypropylen-Kurzfasern verstärktem und mit Zement stabilisiertem tonhaltigem Boden
Tang, Chaosheng (Autor:in) / Shi, Bin (Autor:in) / Gao, Wei (Autor:in) / Chen, Fengjun (Autor:in) / Cai, Yi (Autor:in)
Geotextiles and Geomembranes ; 25 ; 194-202
2007
9 Seiten, 9 Bilder, 5 Tabellen, 31 Quellen
Aufsatz (Zeitschrift)
Englisch
Strength Characteristics of Clayey Sand Stabilized Using Polypropylene Fiber or Portland Cement
| Springer Verlag | 2024
Strength Characteristics of Clayey Sand Stabilized Using Polypropylene Fiber or Portland Cement
| Springer Verlag | 2024
Desiccation cracking behavior of polypropylene fiber-reinforced clayey soil
| British Library Online Contents | 2012