Papers

@article{González-Fonteboa2021,

title = {Influence of the mixing procedure on the fresh state behaviour of recycled mortars},

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

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85111872138&doi=10.1016%2fj.conbuildmat.2021.124266&partnerID=40&md5=0a70d2daf003bec54de4c57a8635e78b},

doi = {10.1016/j.conbuildmat.2021.124266},

issn = {09500618},

year  = {2021},

date = {2021-01-01},

urldate = {2021-01-01},

journal = {Construction and Building Materials},

volume = {299},

publisher = {Elsevier Ltd},

abstract = {The effect of two different mixing protocols on the fresh-state behaviour of self-compacting mortars with and without recycled sand was compared. For this purpose, the mortar mixes were designed considering three solid volume fractions, while maintaining the water to cement ratio and superplasticiser dosage constant. The results conclude that the inclusion of recycled sand harmfully affects the rheological behaviour of the mortars and this effect can be mitigated using mixing protocols with longer mixing times and delayed admixture addition times. Finally, a rheograph was developed to explain the expectable changes in a conventional mix when recycled sand is incorporated, the solid volume fraction is varied and changes are applied to the mixing procedure. © 2021 The Authors},

note = {cited By 9},

keywords = {Delayed admixture addition time; Fine-particles; Fresh state; Mixing protocol; Mixing time; Mortar mixes; Recycled sands; Self-compacting mortars; Solid volume fraction; State behavior, Mixing, Mortar; Recycling; Rheology; Sand; Volume fraction},

pubstate = {published},

tppubtype = {article}

}

@article{Puertas201822,

title = {Alkali-activated slag concrete: Fresh and hardened behaviour},

author = {Francisca Puertas and Belén González-Fonteboa and Iris González-Taboada and María M. Alonso López and Manuel Torres-Carrasco and Gemma Rojo-López and Fernando Martínez-Abella},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85030679824&doi=10.1016%2fj.cemconcomp.2017.10.003&partnerID=40&md5=55e3f2fd798b6078f508e2db2e4c24b7},

doi = {10.1016/j.cemconcomp.2017.10.003},

year  = {2018},

date = {2018-01-01},

urldate = {2018-01-01},

journal = {Cement and Concrete Composites},

volume = {85},

pages = {22 – 31},

publisher = {Elsevier Ltd},

abstract = {The behaviour of fresh and hardened alkali-activated slag (AAS) and OPC concretes was compared and the effect of mixing time assessed. OPC and AAS concrete slump and rheological results proved to differ, particularly when the slag was activated with waterglass (WG). The nature of the alkaline activator was the key determinant in AAS concrete rheology. Bingham models afforded a good fit to all the OPC and AAS concretes. In OPC and NaOH-activated AAS concretes, longer mixing had an adverse effect on rheology while improving hardened performance only slightly. In WG-AAS concrete, longer mixing times, improved mechanical properties and also rheological behaviour was enhanced, in which those conditions were required to break down the microstructure. Longer mixing raised thixotropy in OPC and NaOH-activated AAS concretes, but lowered the value of this parameter in waterglass-activated slag concrete. © 2017 Elsevier Ltd},

note = {Cited by: 201; All Open Access, Green Open Access},

keywords = {Alkali activated slags, Alkali-activated slag concretes, Alkaline activation, Alkaline activators, Atomic absorption spectrometry, Bingham model, Bins, Blast furnaces, Concrete mixing, Concretes, Elasticity, Hardened behaviour, Hardening, Key determinants, Mixing, Rheological behaviour, Rheology, Slags},

pubstate = {published},

tppubtype = {article}

}

@article{González-Taboada20171,

title = {Tools for the study of self-compacting recycled concrete fresh behaviour: Workability and rheology},

author = {Iris González-Taboada and Belén González-Fonteboa and Javier Eiras-López and Gemma Rojo-López},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019157098&doi=10.1016%2fj.jclepro.2017.04.045&partnerID=40&md5=dc483461bc80b8981beee59d6b2ab36b},

doi = {10.1016/j.jclepro.2017.04.045},

year  = {2017},

date = {2017-01-01},

urldate = {2017-01-01},

journal = {Journal of Cleaner Production},

volume = {156},

pages = {1 – 18},

abstract = {This work studies the fresh behaviour of self-compacting recycled concrete (SCRC) with different replacement percentages of recycled concrete coarse aggregate (20, 50 and 100%). To control the high absorption of recycled aggregate, three different mixing methods are also used in each studied concrete: M1 (dry aggregate and extra water), M2 (pre-soaked aggregate) and M3 (aggregate with a 3% of natural moisture and extra water). The fresh-state properties are measured with empirical and rheological tests, both carried out at 15, 45 and 90 min from the water-cement contact. Results obtained lead to conclude that rheology is the best tool to control fresh state behaviour of SCRC mixes and that Bingham 5-lowest is the suitable model to describe their rheological behaviour. Additionally, it has been concluded that the best method to produce SCRC is to compensate the recycled aggregate absorption during mixing using an extra quantity of water. With this method, self-compacting behaviour can be maintained with all replacement percentages until 45 min, and even until 90 min when the replacement ratio does not exceed 50%. Moreover, the use of the recycled coarse aggregate with a previous moisture content involves a greater difficulty to control workability and rheology than its use in dry-state condition. © 2017 Elsevier Ltd},

note = {Cited by: 88},

keywords = {Aggregates, Concrete mixing, Concretes, Elasticity, Fresh behaviour, Mechanical properties, Mixing, Moisture, Recycled aggregates, Recycled coarse aggregate, Recycled concrete coarse aggregate, Recycled concretes, Recycling, Replacement ratio, Rheological behaviour, Rheology, Self compacting concrete, Water absorption, Workability},

pubstate = {published},

tppubtype = {article}

}