Publicacións

@article{rodriguez-alvaro_wood_2022,

title = {Wood ash versus expanded clay aggregate as internal curing water reservoirs in high performance concrete},

author = {Roberto Rodríguez-Álvaro and Belén González-Fonteboa and Sindy Seara-Paz and Antonio José Tenza-Abril},

url = {https://doi.org/10.1617/s11527-022-01963-3},

doi = {10.1617/s11527-022-01963-3},

issn = {1871-6873},

year  = {2022},

date = {2022-04-01},

urldate = {2026-08-10},

journal = {Materials and Structures},

volume = {55},

number = {4},

pages = {118},

abstract = {The performances of expanded clay aggregate and wood ash as internal curing water reservoirs were studied in the mortar phase of a hypothetical high performance concrete with a low water-to-binder ratio. The two materials substituted the 15 and 30% of the sand volume. Two different binders, Portland cement and high-volume fly ash blended cement, were used. The compressive strength and the volume stability of the mortars in sealed and air-drying conditions were studied. Furthermore, the desorption capacity of the internal curing water reservoirs and the internal humidity inside the mortars during the first days after casting were analysed. The results shown that the reduction in the self-desiccation shrinkage was higher when the expanded clay aggregate was used, even in air-drying curing conditions, due to its higher desorption capacity in low-relative-humidity environments in comparison to that of the wood ash. However, wood ash had a stronger beneficial effect on early age autogenous shrinkage without significantly increasing the drying shrinkage. The two alternative aggregates influenced the strength moderately. Considering the technical, economic, and environmental implications of using the two lightweight aggregates, wood ash is recommended.},

keywords = {By-product, Circular economy, Curing sensitivity, Internal curing agent, Residues},

pubstate = {published},

tppubtype = {article}

}

@article{rodriguez-alvaro_study_2022,

title = {Study of different granular by-products as internal curing water reservoirs in concrete},

author = {Roberto Rodríguez-Álvaro and Sindy Seara-Paz and Belén González-Fonteboa and Miren Etxeberria},

url = {https://www.sciencedirect.com/science/article/pii/S2352710221014819},

doi = {10.1016/j.jobe.2021.103623},

issn = {2352-7102},

year  = {2022},

date = {2022-01-01},

urldate = {2026-08-10},

journal = {Journal of Building Engineering},

volume = {45},

pages = {103623},

abstract = {The use of three different waste-based materials, i.e. ceramic recycled aggregate (CRA), mixed recycled aggregate (MRA), and coal bottom ash (CBA), as internal curing water reservoirs was investigated. Their effects as fine aggregates in the mortar phase of a hypothetical concrete with a low water-to-binder ratio were studied. The used binders were ordinary Portland cement and high-volume fly-ash-blended cement. The addition of MRA and CBA significantly decreased the autogenous shrinkage, whereas their negative effects on drying shrinkage and the compressive strength were minimal. However, the CRA had the worst effect on autogenous shrinkage but increased the strength of the specimens.},

keywords = {By-product, Drying, Internal curing agent, Residues, Self-desiccation},

pubstate = {published},

tppubtype = {article}

}

@article{rodriguez-alvaro_masonry_2021,

title = {Masonry mortars, precast concrete and masonry units using coal bottom ash as a partial replacement for conventional aggregates},

author = {Roberto Rodríguez-Álvaro and Belén González-Fonteboa and Sindy Seara-Paz and Emilio J. Rey-Bouzón},

url = {https://www.sciencedirect.com/science/article/pii/S0950061821004979},

doi = {10.1016/j.conbuildmat.2021.122737},

issn = {0950-0618},

year  = {2021},

date = {2021-05-01},

urldate = {2026-08-06},

journal = {Construction and Building Materials},

volume = {283},

pages = {122737},

abstract = {Granular coal combustion products are problematic waste materials whose use as aggregates in concrete has been extensively studied. However, its integration into other non-structural materials and elements has not been so widely documented. Masonry mortars, precast concrete and masonry units with different ratios of coal bottom ash replacing conventional aggregates have been studied. With the incorporation of coal bottom ash in the mortars, the workability, density and strength decrease whereas the porosity, the weight loss and the drying shrinkage increase. However, low replacement ratios have slight effects. The use of coal bottom ash as an internal curing water reservoir is proposed as the most promising future line of research.},

keywords = {Blocks, Cement based material, Coal combustion products, coating, Joint, Plaster, Prefabricated, Render, Residues, Waste},

pubstate = {published},

tppubtype = {article}

}