Design-oriented method for concrete pavements with volumetric stability admixtures: An integrated experimental and analytical approach

Autor: T. Ikumi, A. Monserrat López, S. Aidarov, A. Aguado, A. de la Fuente
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Case Studies in Construction Materials, Vol 19, Iss , Pp e02583- (2023)
Druh dokumentu: article
ISSN: 2214-5095
DOI: 10.1016/j.cscm.2023.e02583
Popis: The high-performance demands on industrial floors, both in terms of larger slab dimensions and increased durability under harsh operating conditions, have led to the growing use of expansive admixtures. These generate a controlled expansive reaction within the concrete and compensate the early-age shrinkage. Despite their increasing use, calculation methods that permit to consider the expansive agents during the pavement design phase with a certain level of reliability are still unexistent. This study presents a straightforward cross-sectional model to assess both the stress-strain state and joint-opening of concrete pavements with volumetric stability admixtures by considering the slab dimensions, concrete composition, exposure conditions, and base friction characteristics. For that, a novel experimental device is designed and implemented in this work to characterize the dimensional variations associated with expansive agents since casting. A Type-G commercial volumetric stability admixture is considered as the expansive admixture. A full-scale validation of the proposed model is performed on a jointless concrete panel constructed by RCR Industrial Flooring in Spain. This validation proves the feasibility of the combined approach of laboratory calibration of the expansive addition and the cross-sectional model presented to accurately estimate both the slab deformations and joint opening developed over the 77-day test period.
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