Research on the Axial compressive stress-strain relationship and the behavior of structural lightweight aggregate concrete

Abstract

When compared to regular concrete, the lightweight aggregate-only concrete has significantly reduced mechanical
characteristics and is thus unsuitable for structural purposes. By substituting some of the natural crushed stone with synthetic
lightweight aggregate, a hybrid aggregate system may be used to improve the performance of concrete. “The stress-strain
relationship and the Poisson effect in concrete were examined in the previous work using expanded shale as the artificial
lightweight aggregate. The experiment employed four different volumes of shale aggregate, and the mechanical characteristics of
concrete were studied as a result of the volume content. When shale aggre- gate volume was increased, peak stress and modulus of
elasticity decreased. However, as the shale aggregate volume percentage increases, so do the axial and lateral stresses associated
with the peak stress. The more the shale aggregate concentration in the concrete, the greater the Poisson effect was seen in the
lateral strain to axial strain ratio. The stress-strain connection between lightweight concrete and lightweight aggregate may now be
analytically defined.