Shrinkage prediction of recycled aggregate structural concrete with alternative binders through partial correction coefficients

2026-06-29T22:46:44Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/74682023-04-17T08:25:12Zcom_10259_6171com_10259_5086com_10259_2604col_10259_6172

Shrinkage prediction of recycled aggregate structural concrete with alternative binders through partial correction coefficients Revilla Cuesta, Víctor Evangelista, Luís Brito, Jorge de Skaf Revenga, Marta Manso Villalaín, Juan Manuel Recycled aggregate structural concrete Reactive magnesium oxide Ground granulated blast furnace slag Shrinkage-prediction model Partial correction coefficient Prediction interaction Estimating the shrinkage of structural concrete is essential to calculate, at the design stage, the stresses that a structure may experience due to this phenomenon. Nevertheless, changes in composition, as well as the use of wastes as raw materials, alter the shrinkage behaviour of concrete and render invalid shrinkage-prediction models from the standards. This paper shows a procedure to estimate the shrinkage of recycled aggregate concrete made with alternative binders. This procedure is based on modifying the shrinkage estimated through the Eurocode 2 or ACI 209.2R models by multiplying it by a partial correction coefficient for every change in concrete composition. The application of this procedure to high-performance and self-compacting concretes made with various contents of recycled aggregate of different maturity, reactive magnesium oxide and ground granulated blast furnace slag showed that it is suitable for estimating long-term shrinkage with maximum deviations of ±10%. However, to obtain an adequate accuracy, it is necessary to bear in mind some tips, such as the need to consider the prediction interactions between the factors, the usefulness of the natural logarithm of the concrete age to improve the estimation accuracy or the convenience of introducing a concrete-age-dependent coefficient to reach accurate shrinkage estimations at early ages. Finally, the partial correction coefficients are found to be of a simpler nature for the ACI 209.2R model, so this model is recommended for predicting the shrinkage of recycled aggregate concrete. 2023-02-28 2023-02-28 2022-05 info:eu-repo/semantics/article 0958-9465 http://hdl.handle.net/10259/7468 10.1016/j.cemconcomp.2022.104506 eng Cement and Concrete Composites. 2022, V. 129, 104506 https://doi.org/10.1016/j.cemconcomp.2022.104506 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-113837RB-I00/ES/ESTUDIO A ESCALA REAL DE HORMIGONES SOSTENIBLES, HIDRAULICOS Y BITUMINOSOS, DE ALTAS PRESTACIONES, FABRICADOS CON RESIDUOS SIDERURGICOS Y DE CONSTRUCCION/ info:eu-repo/grantAgreement/MICIU/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FPU17%2F03374/ES/ info:eu-repo/grantAgreement/MIU//EST19%2F00263/ES/ info:eu-repo/grantAgreement/Junta de Castilla y León//UIC 231/ info:eu-repo/grantAgreement/UBU//Y135.GI/ http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier