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Gestión Sustentable de Infraestructura VialSustainable Management of Road Infrastructure
Ing. Mauricio Salgado Torres M.Sc.
SustainabilitySustentabilidad - 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
SustainableSustentable - 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 sustainabilityLos 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 UserLa 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 CO2 emissions.
• Use of industrial by-products (fly ash and slag) in concrete paving mixes improves the durability of the pavement, save money, reduce their CO2 footprint, reduce costs, conserve natural resources.
Reduce CO2
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 surfacesImportancia 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. RiffelHeidelbergCement 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: http://www.pavements4life.com
Pavement-vehicle interaction (PVI)
Modelación del deterioro
Modelación del deterioro
Modelación del efecto de los
trabajos de M&R
Modelación del efecto de los
trabajos de M&R
Estimación de costos de
ejecutar las obras
Estimación de costos de
ejecutar las obras
Evaluación EconómicaEvaluación Económica
Estimación de los efectos sobre los
usuarios
Estimación de los efectos sobre los
usuarios
Estimación de efectos
energéticos y medioambientales
Estimación de efectos
energéticos y medioambientales
Road Deterioration (RD)
Road Deterioration (RD)
Work Effects (WE)Work Effects (WE)
Road User Effects (RUE)
Road User Effects (RUE)
Safety, Energy and Enveriomental Effects (SEE)
Safety, Energy and Enveriomental Effects (SEE)
Estimación del costo del efecto
sobre los usuarios
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
www.ich.cl
www.pavimentando.cl
Muchas Gracias!!!
