Publicacións

@article{Rojo-López2022,

title = {Rheology, durability, and mechanical performance of sustainable self-compacting concrete with metakaolin and limestone filler},

author = {Gemma Rojo-López and Belén González-Fonteboa and Fernando Martínez-Abella and Iris González-Taboada},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85134035376&doi=10.1016%2fj.cscm.2022.e01143&partnerID=40&md5=0f8f839bbe6aa5f1c5456f95d4cae965},

doi = {10.1016/j.cscm.2022.e01143},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {Case Studies in Construction Materials},

volume = {17},

publisher = {Elsevier Ltd},

abstract = {This study analyzed the performance of self-compacting concrete with a paste composition that includes limestone filler and metakaolin replacing cement to design binary (75% cement and 25% limestone filler) and ternary binders (60% cement, 25% limestone filler and 15% metakaolin). Furthermore, to analyze the effect of the solid volume fraction (volume of sand and coarse aggregate) on concrete rheology, the concretes were designed using four volumes of paste (350 l, 400 l, 450 l and 500 l). Rheological tests were performed at three resting times to measure the viscosity and yield stress over time. The results indicated that the viscosity decreased by 43.3% when the cement was replaced by limestone filler and increased by 73.1% when the cement was replaced by 15% metakaolin while maintaining the limestone filler. These values were obtained as 27.6% and 62.2%, respectively, when the yield stress was analyzed. In addition, the hardened properties (mechanical behavior and durability) were studied by measuring the strengths at 28 days, as well as the electrical resistivity and ultrasonic pulse velocity over time. In this case, at 28 days the use of binary binder reduces the strength and resistivity (about 20%) and the employment of ternary binder reduces strength (15%) while increases the resistivity up to the double (when compared to the 100 C concrete). Moreover, to measure the efficiency of the concrete, a material index was designed that considers the fresh behavior, mechanical performance, durability, cost, and environmental impact. Self-compacting concretes with ternary binders provided the highest indices. The use of alternative materials, particularly metakaolin has been proven to be a good option to enhance concrete sustainable performance. © 2022 The Authors},

note = {Cited by: 40; All Open Access, Gold Open Access, Green Open Access},

keywords = {Aggregates, Binders, Biocompatibility, Cements, Durability, Durability performance, Efficiency, Elasticity, Environmental impact, Fillers, Life cycle, Light velocity, Lime, Limestone, Limestone filler, Material efficiency, Mechanical performance, Metakaolins, Plastic viscosity, Resistivity, Self compacting concrete, Supplementary cementitious material, Ultrasonic pulse velocity, Viscosity, Yield stress},

pubstate = {published},

tppubtype = {article}

}

@article{otero-chans_joints_2018,

title = {Joints with bars glued-in softwood laminated timber subjected to climatic cycles},

author = {Dolores Otero-Chans and Javier Estévez-Cimadevila and Emilio Martín-Gutiérrez},

url = {https://www.sciencedirect.com/science/article/pii/S0143749617302270},

doi = {10.1016/j.ijadhadh.2017.12.010},

issn = {0143-7496},

year  = {2018},

date = {2018-04-01},

urldate = {2026-08-04},

journal = {International Journal of Adhesion and Adhesives},

volume = {82},

pages = {27–35},

abstract = {The effect of climatic cycles (extreme temperatures and humidity) on the performance of joints made with threaded steel rods glued by two-component epoxy adhesive in softwood glulam timber is studied. Short-term tests have been made on three types of specimens: standard condition specimens (20°C/65%RH), specimens subjected to extreme temperature and humidity during its storage in climatic chamber in service load situation, and specimens in similar unloaded situation. The load capacity, the failure modes and the load-deflection curves have been compared for the different types of specimens. The obtained results do not show a clear influence of the previous exposition to extreme climatic situations in the strength of the joint. On the contrary, the stiffness of the joints, especially those with longer anchorage length, has been reduced up to 35% in the specimens that were previously subjected to climatic changes, both unloaded and in load service situation.},

keywords = {Durability, Epoxides, Glued-in rods, Wood and wood composites},

pubstate = {published},

tppubtype = {article}

}