Abstract
Through the laboratory test, the mechanical properties of cementsoil with adding desulfurization gypsum, fly ash, and polypropylene fiber were studied. Three different percentages (0%, 0.5%, and 1.0%) of polypropylene fiber were mixed into new cementsoil for which the cement content is 15% of the dry soil weight, the desulfurization gypsum content is 2% of the dry soil weight, and the fly ash content is 1.0% of the dry soil weight. The new cementsoil strength reinforced with polypropylene fiber was studied by triaxial test under different polypropylene fiber mixing ratio, different age, and different confining pressure. The experimental results show that, compared with ordinary soil, the deviatoric stress and the peak shear strength reinforced with polypropylene fiber have different amplitude increase. At the same time, the internal friction angle of new cementsoil with polypropylene fiber increases slightly with the growth of the age. The stress-strain curve of the polypropylene fiber cementsoil has the typical work hardening characteristic and has the characteristics of bulge fracture.
Highlights
IntroductionSoil reinforcement has been introduced into the field of geotechnical engineering for many years in order to improve the properties of ground soil in specific engineering projects.Traditional geosynthetics, such as geotextile and geogrid, have been proved to be efficient, and they are being increasingly used in geotechnical engineering and other fields [1].They have attracted the attention of scientists worldwide, and a number of triaxial tests, unconfined compression tests, CBR tests, and direct shear tests on this subject have been conducted [2–5, 5–12]. Consoli et al, 1998 [13], added the randomly distributed fibers to cemented soil, conducted triaxial compression tests on the mixture, and concluded that the fiber reinforcement increased both the peak and residual strength and changed the cemented soil’s brittle behavior to a more ductile one
They have attracted the attention of scientists worldwide, and a number of triaxial tests, unconfined compression tests, CBR tests, and direct shear tests on this subject have been conducted [2–5, 5–12]
The unconfined compression strength and the unconsolidation σ1 − σ3 σ1 − σ3 kPa kPa kPa (a) 7-day age (b) 14-day age σ1 − σ3 kPa kPa kPa (c) 28-day age undrained triaxial shear strength of new cementsoil were the most commonly and important parameters used in bearing capacity design of mixing piles
Summary
Soil reinforcement has been introduced into the field of geotechnical engineering for many years in order to improve the properties of ground soil in specific engineering projects.Traditional geosynthetics, such as geotextile and geogrid, have been proved to be efficient, and they are being increasingly used in geotechnical engineering and other fields [1].They have attracted the attention of scientists worldwide, and a number of triaxial tests, unconfined compression tests, CBR tests, and direct shear tests on this subject have been conducted [2–5, 5–12]. Consoli et al, 1998 [13], added the randomly distributed fibers to cemented soil, conducted triaxial compression tests on the mixture, and concluded that the fiber reinforcement increased both the peak and residual strength and changed the cemented soil’s brittle behavior to a more ductile one. Soil reinforcement has been introduced into the field of geotechnical engineering for many years in order to improve the properties of ground soil in specific engineering projects Traditional geosynthetics, such as geotextile and geogrid, have been proved to be efficient, and they are being increasingly used in geotechnical engineering and other fields [1]. Miller and Rifai, 2004 [15], reported that the shrinkage crack reduction and hydraulic conductivity of compacted clay soil increased with an increase in fiber content. All these investigations show that the inclusion of discrete fibers can improve the strength behavior and significantly enhance the ductility and fracture toughness of soil matrix. It has been proved that discrete fibers can be considered as good earth reinforcement material
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
