Proposing a New Method Based on Image Analysis to Estimate the Segregation Index of Lightweight Aggregate Concretes.

ABSTRACT: This work presents five different methods for quantifying the segregation phenomenon in lightweight aggregate concretes (LWAC). The use of LWACs allows greater design flexibility and substantial cost savings, and has a positive impact on the energy consumption of a building. However, these materials are susceptible to aggregate segregation, which causes an irregular distribution of the lightweight aggregates in the mixture and may affect the concrete properties. To quantify this critical process, a new method based on image analysis is proposed and its results are compared to the well-established methods of density and ultrasonic pulse velocity measurement. The results show that the ultrasonic test method presents a lower accuracy than the other studied methods, although it is a nondestruc

SUBMITTER: Solak AM 

PROVIDER: S-EPMC6862299 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature