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Internal curing of high performance concrete with superabsorbent polymers: Evaluation of durability

Author(s): Jennifer Anette Canul Polanco, Alejandro Durán Herrera, Pedro Leobardo Valdez Tamez
Paper category: Proceedings
Book title: Proceedings of the International RILEM Conference
Materials, Systems and Structures in Civil Engineering 2016
Segment on Concrete with Supplementary Cementitious Materials
Editor(s): Ole M. Jensen, Konstantin Kovler and Nele De Belie
e-ISBN: 978-2-35158-179-7
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 372- 383
Total Pages: 12
Language : English

Abstract: Internal Curing (IC) has been proved to be an effective technique to mitigate autogenous shrinkage of High Performance Concrete (HPC). Among several agents that have been studied for IC, superabsorbent polymers (SAP) have higher absorption rates and retain the IC water until the relative humidity decreases. However, these agents could remain within the concrete as voids and can affect the durability. To evaluate the effect of SAP on the durability of HPC with silica fume, electrical resistivity and non-steady chloride migration coefficient tests were conducted. In this study, portland cement-silica fume mortars were made with and without SAP with a w/c ratio of 0.40 to determine the performance of internal curing in autogenous shrinkage, electrical resistivity and chloride diffusion coefficient.. The silica fume addition was of 9.5% to consume all the calcium hydroxide produced by the portland cement and it was calculated by thermogravimetric analysis. Chemical shrinkage according to ASTM 1608 was measured to determine the required amount of IC water, according to through the hydration model of Powers, which is modified by Jensen.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00

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