MECHANICAL PROPERTIES OF STRUCTURAL LIGHTWEIGHT CONCRETE USING LIGHTWEIGHT AGGREGATES FROM CONSTRUCTION AND DEMOLITION WASTE

Abstract

In the era of sustainable development, lightweight concrete (LWC) manufactured from industrial waste becomes a potential material, particularly LWC using lightweight aggregates (LWA) from construction and demolition waste (CDW). However, there is a lack of study on this LWC manufacture, especially in terms of its mechanical properties and structural applications. This paper presents several experimental works that were conducted to assess the mechanical properties of lightweight concrete (LWC) made from construction and demolition waste (CDW), including the elastic modulus, compressive strength, splitting, and flexural tensile strength. The mechanical properties of this concrete have been impacted by the density, as well as the relationship between the tensile-compressive strengths and the relationship between the elastic modulus and compressive strength based on the elastic factor, as determined based on experimental results. In addition, this paper investigates bond behavior between steel reinforcement (ribbed rebar with a 12 mm diameter) and LWC according to the results of pull-out tests.