Memoria de actividades del ejercicio

L'any 1892 neix com a Tubos Forjados S.A.Es dedica sobretot a la fabricació de tubs sense soldadur

Factura, 1859 oct. 21, Madrid, de Fábrica de Tubos Contínuos y Planchas de Plomo de D. Pedro Valls a ... del Consuelo

Factura impresa escrita a mano en tinta negraNúmero de factura "133"Alcance y contenido: Versa sobre la adquisición de tubos contínuosEn el membrete: "Proveedor de la Real Casa ... Calle de Alcalá, nº 38, Madrid"Carta firmada por VallsNombre completo del destinatario ilegibleMembrete del establecimiento con ornamentos vegetales y florales y con una ilustración del escudo de la Casa Real en el centroPapel ocre y con raya

An innovative approach for temperature control of massive concrete structures at early ages based on post-cooling: Proof of concept

This study proposes a new methodology for the embedment of flexible PVC hoses (with the shape/geometry of the intended cooling pipes) that allows their removal a few hours after casting (i.e. after setting), while allowing that water is pumped through the circular cavity afterward (through a flexible/impermeable sleeve placed to shield the exposed concrete cavity). The PVC hoses are initially filled with oil under pressure, which are deflated a few hours after casting (particularly after setting is identified), and removed without relevant constraints due to their reduction in diameter inherent to deflation. All components and materials embedded into concrete (hose, sleeve) are fully recoverable after the end of the temperature control period, avoiding the loss of materials, with important financial and sustainability gains. This paper intends to show the proof-of-concept carried out in laboratory context conditions, highlighting the features that led to the selection and phasing procedure of the solution proposed.The authors gratefully acknowledge the Foundation for Science and Technology (FCT) for the financial support to: the Research Unit RISCO (FCT/UID/ECI/04450/2013), the Research Unit ISISE (POCI-01-0145- FEDER-007633); the post-doc scholarship grant SFRH/BPD/116022/2016; the Research Project IntegraCrete PTDC/ECM-EST/1056/2014 (POCI-01-0145-FEDER-016841). The author Miguel Azenha also gratefully acknowledges the very rich discussion held with the colleague Paulo Ramísio (University of Minho) on a unrelated matter, that ended up giving birth to the idea forwarded here. Collaboration with Raul Fangueiro and Carlos Mota in the selection of the pipe to use in this work is also gratefully acknowledged