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8 maximum qualities

For an ideal sustainable construction material

3. Decontamination activity in useful life

The concentration of Greenhouse gases in the high part of the atmosphere catch the solar radiation reflected from the earth surface and prevent its release into space, raising the atmospheric temperature in the layers close to the earth surface and, consequently, provoking an increase in the average temperature of the planet (greenhouse effect).


This process is the origin of a possible climate change, and constitutes one of the environmental problems of major relevancy on a worldwide scale, since it can cause the increase in sea levels, melting of glaciers, alterations in the frequency and intensity of rainfall and other extreme meteorological phenomena.


The predominance of  CO2 stands out, with a contribution of 82.8 % of total emissions in 2007. From the year 1990 of the Protocol of Kyoto CO2 emissions grew 60.4%.
SOURCE: BANCO PÚBLICO DE INDICADORES AMBIENTALES DEL MINISTERIO DE MEDIO AMBIENTE, Y MEDIO RURAL Y MARINO.

 

GeoSilex® collects and stores CO2. It reduces 30% the carbon footprint of the cement.

Cement companies are responsible for about 5% of the CO2 emissions, principal cause of the greenhouse effect and climate change (HUMPHREYS AND MAHASENAN 2002).


The information on the quantity of CO2 emissions for each ton of cement changes from a few sources to others. According to Humphreys and Mahasenan (2002), during the manufacture CO2 is produced in two different ways: the chemical conversion of the limestone produced during burning and the consumption of fuels like coal. Depending on the technology of manufacture the emissions change from 720 kg to 1.5 t CO2/t of cement. SOURCE: CEMENT ECOLOGICAL FOOTPRINT. SUSTAINABLE ENERGY LAB.


Cemex, CO2 total emission: 631 Kg. CO2/t of cement. SOURCE: PORTLAND CEMENT ASSOCIATION, U.S. CEMENT INDUSTRY FACT SHEET FROM EBN VOLUME 2, NO.2.


In a concrete (2,350 Kg/m3) with 12 % of cement (280 Kg c x 0,850 kg CO2 = 238 Kg CO2) the emissions corresponding to cement is 101.3 g CO2 for Kg of concrete. The fingerprint of CO2 of the GeoSilex® is-250 g CO2/Kg Gs. If we add to the mixture the same quantity of GeoSilex as of cement we reduce 72 Kg of CO2, that is to say 30 % of the carbon footprint of the cement.

 

Materiales para arquitectura activa frente al CO2

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