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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Nacional de Colombia
2019
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| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=64382627005 https://www.redalyc.org/journal/643/64382627005/ https://www.redalyc.org/journal/643/64382627005/html/ https://www.redalyc.org/journal/643/64382627005/64382627005.epub https://www.redalyc.org/journal/643/64382627005/movil |
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- Evaluation of internal curing effects on concrete Sergio David Rodríguez-Torres Nancy Torres-Castellanos Ingeniería Slum Absorption Contraction Internal curing Chloride resistance The objective of the present research was the evaluation of some fresh and hardened-state properties of concretes, in which coarse aggregates were partially replaced by lightweight ones previously saturated, in percentages of 15% and 25%. The lightweight aggregates were calcined clays and crushed clay bricks. In parallel, the effect of an internal curing agent composed of superabsorbent polymers (SAP) was evaluated. The properties evaluated in the fresh and hardened-state of concretes with a/c of 0,30 were: slum, air content, density, compression resistance, modulus of elasticity, initial superficial absorption and chlorine resistance. Results showed the efficiency of crushed clay bricks as internal curing, as well as the need for deeper research on the use of the evaluated lightweight aggregate as internal curing aggregate in concrete. Results indicate that the crushed clay bricks and the internal curing agent fulfill the behavior expected, in terms of strength and durability. However, the evaluated lightweight aggregate produces a reduction in the resistance and durability of the concrete. The observed behavior in strength and durability is especially variable for the age of 180 days, compared with conventional concretes. 2019 artículo científico 0120-5609 https://www.redalyc.org/articulo.oa?id=64382627005 https://www.redalyc.org/journal/643/64382627005/ https://www.redalyc.org/journal/643/64382627005/html/ https://www.redalyc.org/journal/643/64382627005/64382627005.epub https://www.redalyc.org/journal/643/64382627005/movil 10.15446/ing.investig.v39n2.76505 en http://www.redalyc.org/revista.oa?id=643 Ingeniería e Investigación application/pdf Universidad Nacional de Colombia Ingeniería e Investigación (Colombia) Num.2 Vol.39