RT info:eu-repo/semantics/article
T1 Self-compacting concrete containing coarse recycled precast-concrete aggregate and its durability in marine-environment-related tests
A1 Fiol Olivan, Francisco
A1 Revilla Cuesta, Víctor
A1 Thomas, Carlos
A1 Manso Villalaín, Juan Manuel
K1 Recycled precast-concrete aggregate
K1 Self-compacting concrete
K1 Marine environment
K1 Capillary water absorption
K1 Carbonation
K1 Moist/dry test
K1 Ingeniería civil
K1 Civil engineering
K1 Materiales de construcción
K1 Building materials
AB Marine environments are extremely challenging for the long-term durability of concrete. Prior validation ofconcrete durability is therefore a prerequisite to guarantee its adequate performance under marine environmental conditions. In this study, the performance of Self-Compacting Concrete (SCC) with variable contents ofcoarse Recycled Precast-Concrete Aggregate (RPCA) and two different cement contents is assessed in terms ofcapillary water absorption, natural and accelerated carbonation, resistance to SO2 attack, and moist/dry performance in drinking water, marine water, and sulfate water. These tests are intended to simulate the conditionsof a marine environment. In general, the results showed that an SCC containing coarse RPCA of adequatedurability under marine conditions could be produced. On the one hand, porosity due to the presence of RPCAincreased less as the cement content was increased, which in turn reduced water absorption and SCC carbonation. For example, the effective porosity of the SCC was reduced by 25 % between day 28 and day 180,following the addition of 100 % coarse RPCA. On the other hand, both the SO2-attack and the moist/dry testsrevealed that the weight of the SCC with RPCA underwent greater variations, due to the reactions of the cementhydration products with chlorides and sulfates, as well as salt deposition. However, SCC compressive strengthwas never adversely affected, as the concrete strength increased up to 8 MPa after the drinking-water and thesulfate-water moist/dry tests when using RPCA. According to both Fick’s and Parrot’s models, the projectedservice life of all the mixes was over 100 years, regardless of the coarse RPCA content, making this sort of SCC afeasible option for construction in marine environments.
PB Elsevier
SN 0950-0618
YR 2023
FD 2023-05
LK http://hdl.handle.net/10259/7999
UL http://hdl.handle.net/10259/7999
LA eng
NO This research work was supported by the Spanish Ministry of Universities, MICINN, AEI, EU, ERDF and NextGenerationEU/PRTR [grant numbers PID2020-113837RB-I00; 10.13039/501100011033; TED2021-129715B-I00]; the Junta de Castilla y León (Regional Government) and ERDF [grant number UIC-231]; and, finally, the University of Burgos [grant number SUCONS, Y135.GI].
DS Repositorio Institucional de la Universidad de Burgos
RD 23-nov-2024