Mortar is easy. We have been doing thousands of years and, although we have refined the formula so that it is not the same as They used 10,000 years ago in Jericho or in the construction of First pyramids of Egyptthe recipe is simple. A part of cement (or an binder in antiquity), one of water and three of sand. With that, we have a mixture that carries millennia serving perfectly.
But, although we have been polishing the formula with best materialsthe mortar has several problems, and the researchers at the University of Newcastle have proposed solve them. As? With an ecological mortar that adds plastic to the dough.
Sand at the point of view. The use of sand is Key for mortar production. Also for concrete, this being a material that we have been trying to withdraw thanks to alternatives They appear from time to time. And the reason to use sand is a problem is because We are exhausting reservations World Cups of this material.
In addition, make mortar, cement and concrete It is very polluting. HE esteem That the cement industry is responsible for approximately 5% of CO₂ global emissions and, this being a fundamental component of the mortar and concrete, the more we reduce its use, the better. Extracting sand can also cause ecological damage In rivers and beaches, as well as health risks due to particle inhalation, for example.
Ecological mortar. It is there where research to create green concrete or the one we mention from the University of Newcastle comes into play. In his studyThe team details how thanks to Aergel Silica and recycled plastic they have created a new mortar that manages to be respectful of the environment.
The team developed different mixtures by adding more or less substitute for the sand and found that the most effective is the one with 7% of silica aerogels and 3% of PET plastic.
White is the silica aerogel. THE GRAY THE PET Plastic
Rescue plastic. But … effective in what? Well, curiously, this new mortar comes to solve several problems of conventional sand. The first thing that highlights is that the new mixture of mortar is able to reduce the loss of heat from a structure by up to 55% if compared to the conventional mortar. This helps both to cool a stay in summer and to retain heat in cold months.
This occurs because conventional mortar is a bad thermal insulator, allowing heat to escape easily. But not only this: the new mortar is also lighter than the conventional one, which implies a lower cost in transport by associated fuel savings.
Thermal conductivity tests of this ecological mortar. We need to try it in the real world …
2×1. Apart from contributing to a construction more efficient at the energy level, this plastic -based mortar Solve another problem directly. PET plastic particles used come from crushed plastic waste (bottles, mainly), so the massive use in mortar can help reduce that contamination of plastics that brings us head.
Tests are missing. The team explains that they have achieved British standards for the construction of this new mortar and are already working on the following big step: finding collaborators as a construction company to request financing and build a house with the ecological mortar.
It is what will allow them to obtain the direct evidence of that potential energy savings, something that until they put into practice in a large -scale real environment, it remains only in the theory. But well, while we wait to see if they get that opportunity, the truth is that it is striking how researchers from the whole globe are committed to Jubilate cement, mortar and concrete.
Another thing is that the new more ecological alternatives are able to compete in costs, which is what would ultimately convince those who raise the buildings.
Images | Newcastle University, Scientedirect
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