"There must be a better way to make the things we want, a way that doesn't spoil the sky, or the rain or the land". This is how Sir Paul McCartney described sustainability. To sustain means to maintain or to keep in progress. The aim of sustainability is to preserve the life on earth for future generations, by balancing its social, economical and most importantly environmental components. Therefore, a study should be made on a construction material’s production components, construction, life cycle and demolition before used.
Traditionally, concrete is made out of cement, mainly Portland cement, which normally comprises 11% of the concrete mix by volume. The cement is mixed with both coarse and fine aggregates. Then water is added to bind the substances together into a quick drying rock-like material. However, this concrete is not considered environmentally friendly. A lot of energy, water and excavations of aggregates are used to get this concrete, which causes nature destruction and pollution. Also, concrete emits a huge amount of carbon dioxide into the atmosphere, which contributes to the greenhouse gases. However, solutions have been found to make concrete a sustainable material that is environmentally friendly.
Nowadays, concrete, in all the stages of its life span, from production components to demolition, is considered to be “green”. For the carbon dioxide crisis, two ways were approachable. One was using used oil instead of coal to heat the cement. Another is producing concrete that has the potential of absorbing carbon dioxide. Other attributes as concrete’s resource efficiency, durability, minimal waste and its ability to recycle, thermal mass, reflectivity and the ability to retain storm water make concrete a more sustainable building material.
For concrete to be “green”, the choice of their raw materials shouldn’t be random. The aggregates used in concrete are coarse and fine. Coarse...