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Cement Replacement

The production of Portland cement and related products is the second highest contributor to industrial carbon output. These products (including concrete and asphalt) account for between 5 – 10 % of all carbon emissions per annum. This is more than the 4% carbon contribution caused by global aviation. An easy rule of thumb to use was; for every ton of cement produced, a ton of CO2 was released.

Till recently it seemed that there was no economical viable alternative on the market. The good news for green developments is that there are products being phased into main stream production that can take the place of cement and other cement related products.

Motivation to change to and the success of these alternatives can be found in its facts and figures. One alternative dries quicker, is stronger and the carbon produced in manufacturing is only 17% added by the same quantity of Portland cement produced.

The numbers becomes even more bizarre, even outlandish if you focus on another alternative. One ton produced prevents the emission of 2.5 tonnes of carbon dioxide. Replacing concrete and asphalt with this alternative will save the following:

CO2 Emissions Saving: 2.600 tons of CO2
The same CO2 saving would require:
1,092 x1000 litres of petrol not burned in one year,
Or saving 520 years electricity in the average home,
the same amount of CO2 would be absorbed by 5,199 trees in one year.
Harmful pollutants savings:
19.2 Tons of sulphur dioxide saved,
26.9 Tons of nitrous oxides saved,
19.2 Tons of carbon monoxide saved.

Sulphur dioxide, nitrous oxides and carbon monoxide all contributes to global warming, acidification and are harmful to human health

Depletion of natural resources savings:
12,480 Tons of limestone and/or shale saved
3,600,000 litres of fresh water saved
On a 120000 sq m area paved.