Desarrollo de cinco actividades steam con formato KIKS

Este taller describirá las líneas maestras del proyecto europeo KIKS (Kids Inspire Kids for Science, Technology, Engineering, Art, Mathematics) y su metodología. Los equipos de alumnos KIKS de dos centros cántabros (el IES Lope de Vega y el Colegio San José), presentarán, junto a sus profesores, cinco actividades diseñadas por ellos y tituladas Cámara Oscura, Razón Áurea, La Memoria, Focos Led y Telégrafo Inalámbrico. Se enfatizará la transversalidad de las mismas y, específicamente, los aspectos matemáticos implicados, tales como la observación, por las personas que se introduzcan en la Cámara Oscura, de la geometría de la proyección plana del exterior sobre el interior de la Cámara; o el diseño y construcción de instrumentos para identificar la Razón Áurea en objetos cotidianos y de la naturaleza; o los aspectos algorítmicos y de programación presentes en el Telégrafo Inalámbrico, donde se usa un sistema electrónico formado por una placa Arduino y una placa de prueba. Finalmente, se transmitirá a los profesores asistentes una información básica que les permita replicar la experiencia y extender la comunidad y filosofía KIKS a otros centros y países. El cupo será de 50 participantes, rotando por cada actividad en grupos de diez, hasta pasar por todas

I, MECHANISM

Máster en Formación del Profesorado de Educación Secundari

Shear strength characterization of fresh MBT and MSWI wastes from a Spanish treatment facility

ABSTRACT: A laboratory shear strength characterization of the landfilled materials of the Municipal Solid Waste integral treatment plant from the Meruelo Environmental Complex in Cantabria (Spain) was performed. The materials tested come from the rejection of the Mechanical and Biological Treatment (MBT-MSW) and the slags produced in the energy recovery plant (MSWI). Laboratory characterization consisted of direct shear and consolidated drained triaxial testing. Mohr-Coulomb failure criterion parameter values were obtained and compared to reported values in the literature. In some tests, failure was not reached due to the reinforcement effect for fibrous particles; thus, the mobilized shear strength parameters for different values of axial strain were obtained. The triaxial test results showed strain-hardening in MSW-MBT but not in MSWI. Failure was reached on both materials in direct shear testing, with MSWI showing peak and ultimate strengths, whereas MBT-MSW exhibited only ultimate strength. Direct shear test obtained strength can be characterized by a cohesion of 20 kPa and a friction angle of 33% for MBT-MSW ultimate strength, while cohesion and friction angle varies from 13.4 to 29 kPa and from 38.5º to 42.3º for MSWI ultimate and peak strength, respectively. The mobilized cohesion and friction angle obtained for MBT-MSW in consolidated drained triaxial tests ranged from 15.1 to 62.7 kPa and 20º to 28.7º, corresponding to a strain level of 5% and 25%, respectively. In triaxial testing of MSWI specimens, failure was reached, and the material showed a cohesion of 51.3 kPa and a friction angle of 32.8%.This work was supported by the Spanish Ministry of Economy and Competitiveness [grant number BIA2012-34956]; the Spanish Ministry of Education, Culture and Sports [grant number FPU12/05530]; and the Dirección de Investigación of the Universidad Católica de la Santísima Concepción [grant number INIDIN 07/2019]. The authors would also like to thank Tircantabria S.L.U. for their support during the investigation, especially on sampling