Asphalt to Reduce the Total Consumption of Energy
The continuous installation of pavement on the road helpsthe growth of domestic economy in the country. As more area are connected to each other, transportation for people and goods becomes easier and faster. However, the process of installing new pavements continuosly needs enormousamount of energy.
In 2014, it was reported that the world consume at least 109,613 terawatt-hour (TWh) energy in a year, including products as lubricants, asphalt, and petrochemicals which have chemical energy content but not used as fuel.The non-energy use of those are amounted to 9,404 TWh. Those energyconsumed, except the non-energy ones, mostly are from fuel and electricity. The world supply of electricity itself is generated by various resources, mostly from coal (40,8%) and natural gas (21,6%). The other sources of electricity are hydro (16,4%), nuclear (10,6%), oil (4.3%), and the rest is from renewable resources for only about 6,3%. The shocking fact is that an estimated of 86%ofthe world’s energy supply comes from fossil fuels. What is more is fossil fuels are considered as unrenewable energy sources, we need to preserve it so it can last longer.
Asphalt for Energy Reduction
The consumption of unrenewable energy sources also has another bad impact to the environment, global warming emission. Global warming emission is resulted from the production of energy production and consumption. This emission includes carbon emission and greenhouse gasses. These do not only rise the temperature of the Earth but also throw pollutants such as sulphurous oxides (SOx), nitrous oxides (NOx), carbon dioxides (CO2), and particulate matter (PM) to the air. Therefore it is important to reduce the global warming emission to prevent worse problems occurring in the future without giving up on economic growth.
In building new pavements, which the main purpose is to help the growth of economic, asphalt could be a wise choice. Asphalt might be the environmental pavement of choice because it has low consumption of energy for production and construction, low emission of greenhouse gases, and conservation of natural resources.
- Less Energy for Production and Construction
Asphalt pavements require 20% less energy in its production and construction.Asphalt requires less energy compared to other pavements because the construction of it does not need a long time. Once the asphalt has been compacted and cooled (which only needs a few hours), it is ready to open to the public so there would not be congestion on the road. As known, congestion leads to unnecessary consumption of fuel and production of emissions. Once the pavements wear out, the top layer will be removed and replaced. For the replacement, the worn-out concrete can be rubblized (fractured) and be used to as the base for the new asphalt road to rehabilitate the old ones or construct the new ones. This whole process helps in conserving energy.
- Less Emission of Greenhouse Gasses
As the result of less energy consumed by the production and the construction of it, the whole process of installing asphalt pavements emit less emission of greenhouse gases.
- Conservation of Natural Resources
With rubblizing, a sustainable process of recycling asphalt concrete, limiting the production of new asphalt base is possible. It is resulting in conserving natural resources used as the base of asphalt pavements.
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