Portland cement replacement materials and their impact on the reduction of greenhouse gas emissions in the environment

Portland cement has been used as a building mortar for many years And to make this building mortar, which is one of the two main compounds of lime and clay, requires a lot of energy consumption. To produce cement, pollution and NOx, CO۲, SO۲ And industrial waste production increases. Increasing use of concrete in the world has increased the production of cement This number is close to ۴.۲ trillion tons of cement annuall, Which causes the increasing production of carbon dioxide Carbon dioxide is a harmful greenhouse gas,Which contributes to global warming and melting polar ice and other contaminants from the ground and tear the ozone layer.It is now very important to use cements or their substitutes, especially pozzolans, for construction, Using pozzolan can reduce both energy loss and pollution caused by cement production And increase the quality of concrete obtained from the use of pozzolans.Pozzolans are silica and aluminum materials that combine with lime in the presence of water at ordinary temperatures to form stable and tensile materials and have the property of cementation, Due to its compounds, it reduces the carbon dioxide in its production compared to ordinary cements and Portland cement And its quality increases compared to other cements and Portland cement.Due to its similar properties to cement, this material is economical, increases the resistance to acid and alkali attack of aggregates and prevents extensive cracking of concrete, a property that is associated with the sealing of water retaining structures and also in connection with Chemical attacks are of interest And has a higher ultimate strength than Portland cement as well as less expansion and is used for bulk building and road concreting. No cracking and failure when one of pozzolan cement is used.Contributing to nature due to reduced consumption of fuel and raw materials of cement and reduction of air pollution and fossil fuels and lower cost of cement production compared to other cements and Portland cement.

کلیدواژه ها:

Pozzolan ، Portland cement ، Microsilica