Abstract
Lightweight aggregate concrete is a material with very low density and good thermal insulation, and several types of lightweight aggregates have been used for lightweight concrete. Since the characteristics of lightweight aggregates strongly affect the properties of lightweight concrete, a proper consideration for the use of lightweight aggregate is very important for development of lightweight materials. In particular, the sizes and spatial distributions of lightweight aggregates can influence the material responses of lightweight concrete, such as compressive strength and thermal conductivity. In this study, different types of gradings of lightweight aggregates are adopted to investigate the effect of gradings on the material properties. Liaver ® , an expanded glass granulate, is used as a lightweight aggregate for the specimens. Virtual models of the lightweight specimens with different gradings are numerically generated, and both mechanical and thermal properties are evaluated using experimental and numerical approaches for more detailed investigation. The obtained results can be utilized to suggest an optimal grading that satisfies both the mechanical and thermal properties of lightweight concrete specimen.
Highlights
Concrete is a representative building material and has a very important role in the construction field
Chabannes et al [6] utilized raw rice hush for lightweight concrete and demonstrated that the material can be used as a filling material to improve the mechanical performance of concrete
The main objective of this study is to investigate the correlation between the size characteristics and the properties of the lightweight aggregate concrete (LWC) specimens with different gradings
Summary
Concrete is a representative building material and has a very important role in the construction field. Since the control of energy consumption has become a worldwide issue, many efforts have been performed to enhance energy efficiency in the field of building and concrete materials. To produce lightweight aggregate concrete, several types of materials have been used as lightweight aggregates. Wu et al [7] used hollow cenospheres from fly ash as lightweight aggregates for the material and confirmed its effect on the improvement of tensile strength. Colangelo et al [8] used a recycled municipal solid waste incinerator (MSWI) fly ash as lightweight aggregates and showed that the material can effectively be utilized as lightweight
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