Presentation on theme: "Gestión Sustentable de Infraestructura Vial Sustainable Management of Road Infrastructure Ing. Mauricio Salgado Torres M.Sc."— Presentation transcript:
Gestión Sustentable de Infraestructura Vial Sustainable Management of Road Infrastructure Ing. Mauricio Salgado Torres M.Sc.
Sustainability Sustentabilidad - Sostenibilidad Meeting the needs of the present without compromising the ability of future generations to meet their own needs Satisfacer las necesidades del presente sin comprometer la capacidad de las generaciones futuras para satisfacer sus propias necesidades
Sustainable Sustentable - Sostenible (Ambiental) (Económico) (Social) (Equitativo ) (Soportable ) (Viable) The real challenge is precisely to achieve greater progress and growth, balanced and development (social and environmental) Gestión Sustentable - Management Sustainable The Progess IS NOT antonym to Sustainability El Progeso NO es antónimo a la Sustentabilidad
Management Sustainable Gestión Sustentable Achieve the desired goals and objectives using available resources efficiently and effectively, consistent with the principles of sustainability. LCA, Life Cycle Assessment (Evaluación del ciclo de vida )
Safe, Durable, Comfortable, Economic and High Quality Standard, in addition to requiring minimum maintenance. However, in Latin America and some other countries, even knowing that "good" pavement should be the most... It simply chooses the cheapest alternative!,... Or simply not valued attributes of a "good pavement" in the decision. And waiting for a miracle, and the pavement constructed endure!
Pavement and the sustainability Los Pavimentos y el concepto de Sustentabilidad Economic Aspects LCA including user cost Environmental Aspects Greenhouse gas (GHG) emissions Global warming Power Consumption Air pollution / noise Social Aspects Road Safety Minor impacts to user User comfort Global trends are aimed at promoting and encouraging the use of technologies that make the SUSTAINABLE PAVEMENT The modern decision criteria exceeded… not limited to a simple ranking by initial cost
The Importance of User La Importancia del Usuario La opinión de los vecinos y comunidades es concluyente y determinante sobre el tipo de infraestructura que requieren y prefieren. The opinion of the neighbor and communities is decisive on the type of infrastructure they need and prefer.
Develop a comprehensive methodology of good-practice concepts for conducting a pavement LCA; Use the developed methodology to quantify GHG emissions for concrete pavements, identify strategic opportunities for reducing emissions, and calculate the cost effectiveness of the reduction strategies; Improve the science which supports pavement LCAs by developing a mechanistic pavement-vehicle interaction (PVI) (model that relates fuel consumption to pavement material and structural properties). Concrete Pavement Life Cycle
Fuente: Santero, N et al. Methods, Impacts, and Opportunities in the Concrete Pavement Life Cycle The use phase includes everything that happens while the pavement is in operation that can be directly attributed to a pavement’s properties and characteristics. The components that are relevant from an LCA perspective are: rolling resistance; albedo; concrete carbonation; lighting demand; tire wear. The use phase has the challenging pretext of being the most impactful yet the most uncertain of the life- cycle phases. Life-cycle phases and components of reviewed pavement LCA tools Concrete Pavement Life Cycle
Potential GHG emission reduction strategies for concrete pavement Estrategias Potenciales de reducción emisiones (gases de efecto invernadero) en pavimentos de hormigón Embodied emissions Supply chain management, SCM Ttwo-lift paving Darwin-ME/MEPDG designs Roller compacted concrete Virgin aggregate substitutes Limestone additions Reduced processing energy Carbonation End on Life, EOL Pervious concrete Albedo and urban heat island White aggregate and White cement Pervious concrete photocatalytic cement two-lift paving (high albedo materials in top surface) Pavement-vehicle interaction - PVI Extra rehabilitation Improved smoothness stability Incentives for reduced initial smoothness
Less intensive construction operations involve a huge fuel cost savings and CO 2 emissions. Use of industrial by-products (fly ash and slag) in concrete paving mixes improves the durability of the pavement, save money, reduce their CO 2 footprint, reduce costs, conserve natural resources. Reduce CO 2
The measured results show that the temperature of cities can be significantly reduced due to the use of clear and bright surfaces such as concrete pavement Importance of clear pavement surfaces Importancia de las superficies claras en los pavimentos Clear surfaces leads to improved nighttime visibility, reduces the need for lighting, in addition to reducing heat island effects. Isla Calor (Heat Island)
Albedo The use of construction materials with a high albedo would cause the temperatures were lower in urban areas The use of building materials bright and clear with a high Albedo would reduce the surface temperature
Concrete is naturally brighter and more reflective than other pavement surfaces. This requires less energy to illuminate comparable areas, which is good for the environment. Having clear surfaces provide better safety for users and greater efficiency in terms of lighting Shinning light on pavement Resplandor en el pavimento
“Photocatalytic road-concrete” Pavimentos Fotocatalíticos TiO2 is added to a cement mortar in order to diminish the air polluting effect by exhaust gasses. In particular, the conversion of NOx to NO3 For the purification process is necessary that the concrete is exposed to ultraviolet radiation that is included in the light of day. Fuente: S. Riffel HeidelbergCement AG, Development & Applications Leimen, Germany
Energy and fuel savings when driving on a hard surface Ahorro energético y de combustible al circular sobre una superficie rígida La superficie rígida sufre una deflexión insignificante.... Lo que significa que no hay desperdicio de energía ni de desperdicio de combustible al circular los vehículos Fuente: Pavement-vehicle interaction (PVI)
Modelación del deterioro Modelación del efecto de los trabajos de M&R Estimación de costos de ejecutar las obras Evaluación Económica Estimación de los efectos sobre los usuarios Estimación de efectos energéticos y medioambientales Road Deterioration (RD) Work Effects (WE) Road User Effects (RUE) Safety, Energy and Enveriomental Effects (SEE) Estimación del costo del efecto sobre los usuarios HDM-4 - Highway Development Management
Fuel Consumption Modeling Modelación del Consumo de Combustible Predicts fuel consumption as a function of the use of power. Using two parameters: Fuel consumption with vehicle engine and stopped Conversion factor of fuel efficiency Consumer Tire Modeling Modelación de Consumo de Neumáticos The model includes the following recommendations: Effects of roughness. Effect of type of tire. Effects of acceleration in the event of congestion.
Reduced demand on non renewable resources Menor demanda en los recursos no renovables The strength and stiffness of concrete results in fewer and thinner layers of sub-base materials needed, and less need of material resources. The concrete pavement have a lower demand on nonrenewable resources.
Life-cycle GWP per km (mi) for MEPDG procedure compared to AASHTO '93 design procedure Compared to MEPDG procedure vs AASHTO '93 design procedure
Importance of the texture of the pavement Importancia de la textura del pavimento Using concrete provides the desirable friction and skid resistance properties of roadways. In addition to providing better friction and skid resistance, concrete pavements offer other safety, cost, and environmental benefits: Non-rutting surface that doesn’t trap water Excellent surface drainage Better light reflectance Fewer repairs … and fewer work zones over life of pavement
“Less noise on the pavement” Pavimentos Silenciosos Texture (noise emission) Textura (emisión de ruido) Porosity (noise absorption) Porosidad (absorción de ruido) Pervious concrete Diamond Griding
Mauricio Salgado Torres Cement and Concrete Institute of Chile - ICH Muchas Gracias!!!