Abstract
In this study, an approach is developed to estimate the density and effective elastic modulus of a lightweight bulk filling material made up of expanded polystyrene (EPS) and cement-reinforced clay (matrix). First, a representative volume element (RVE) is composed of cell A (an EPS and matrix) and cell B (matrix only). Then, an elastic interface is introduced to describe the discontinuity of displacement at the interface between EPS beads and matrix. Third, an Eshelby compliance tensor is modified in cell A to include the effects of imperfect interface and the compressibility of EPS beads. Finally, the approach for the density and effective elastic modulus of the EPS beads mixed cement-reinforced clay is verified with experimental data. The compressibility ratio of lightweight clay is compared under different confining pressures and curing times. It is found that the imperfect interface has salient impacts on the effective elastic modulus with the increase of volume fraction of inclusions. The interface parameters (α and β) vary with curing time and confining pressure. At the same curing time, the parameter α is almost constant regardless of confining pressure but the parameter β changes with confining pressure. The compressibility ratio is smaller for longer curing time if the confining pressure is constant.
Highlights
Lightweight bulk filling material may be lightweight clay or lightweight concrete as shown inThe expanded polystyrene (EPS) has some excellent physical and mechanical properties such as lightweight, excellent thermal and structural damping
The effective elastic modulus of the representative volume element (RVE) unit can be estimated through a simplified homogenization approach
This study proposed an approach to estimate the density and effective elastic modulus of
Summary
An approximation is questionable for high inclusion content where interaction may studied when estimating the mechanical properties of composite material under elastic deformation be strong. For this interaction, Mori-Tanaka tensor-based schemes have been proposed and the effects [22,23,24]. The concept of imperfect interface was firstly proposed by Benceniste and Hashin [30,31,32] This interaction among inclusions and the imperfect interface between inclusions and matrix are important factors affecting the effective properties of lightweight bulk filling material, should be carefully included.
Sign-in/Register to view highlights & summary 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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
