New insights on the segregation due to manufacture conditions of lightweight aggregate concretes

Author(s): Afonso Miguel Solak, Antonio José Tenza-Abril, Francisco Baeza-Brotons, Victoria Eugenia García-Vera, Marcos Lanzón
Paper category: Proceedings
Book title: SynerCrete’18: Interdisciplinary Approaches for Cement-based Materials and Structural Concrete: Synergizing Expertise and Bridging Scales of Space and Time Vol. 1 & 2
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 273-278
Total Pages: 6
Language : English

Abstract: Lightweight aggregate concrete (LWAC) is susceptible to segregation because of the differences between the densities of lightweight aggregates and mortar, influencing the strength and durability of concrete. Besides that, due to high workability and low viscosity, LWAC is susceptive to segregation during mixing process, transporting, placement and dormant period. In the present study, three variables related to the manufacturing process of LWAC samples were studied. Six different LWACs were manufactured considering different times of vibration, in one and two layers. To verify the influence of the initial hydration of Portland cement and consequently loss of workability in the segregation, the same LWACs were manufactured considering different times between mixing and molding. A statistical analysis was applied for establishing the structure of the variable dependence in segregated concretes. The results contribute to a better understanding of the segregation in lightweight concrete concluding that the vibration time per layer and the type of vibration of LWAC have a significant influence on the segregation of the samples.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00