Abstract
Due to the low density of the aggregates and the longer mixing times, lightweight aggregate concrete (LWAC) is susceptible to segregation of the aggregates. Several studies have proposed different methods to estimate the segregation of concrete because segregation affects strength and durability in structures. Image analysis techniques have become very popular for quickly analysing different materials and, together with the widespread use of mobile applications, can make it much easier for engineers to obtain parameters that identify concrete segregation. The aim of this work was the development of a mobile application to photograph the section of a concrete specimen and indicate the segregation values. A simple, fast, and effective application was implemented, and the results were validated with other previously published results, which can facilitate the task of engineers and researchers to determine the segregation of concrete.
Highlights
Concrete is one of the most important building materials throughout history; it has been used for more than two thousand years, and it is still used today because of its versatility
There has been a rapidly growing demand for Lightweight aggregate concrete (LWAC) owing to its low weight, which reduces dead loads sustained by structural elements, reducing costs of foundation and seismic loads [1] and improving permeability [2]
Ke et al proposed a procedure for determining the segregation index (SIKe ) of concretes [28,38] with the ratio of densities measured in the same specimen
Summary
Concrete is one of the most important building materials throughout history; it has been used for more than two thousand years, and it is still used today because of its versatility. Lightweight aggregate concrete (LWAC) incorporates lightweight aggregates (LWA) into its mix and allows flexibility in the design, providing many advantages. There has been a rapidly growing demand for LWAC owing to its low weight, which reduces dead loads sustained by structural elements, reducing costs of foundation and seismic loads [1] and improving permeability [2]. LWAC has favourable effects on the thermal properties due to its density, which provides better thermal insulation and fire resistance [3,4]. LWAC, due to its good thermal properties [5], is a real alternative to conventional concretes because it reduces the bridging effects and contributes to reducing energy needs [6]. LWAC contributes to sustainable development by optimizing structural efficiency, improving durability, and extending concrete’s service life
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