فهرست نشریات علمی دسترسی آزاد ایران

This research aims to investigate the reduction of CO 2 emissions in the cement production process by producing pozzolanic portland cement (PPC) with the characteristics of ordinary portland cement (OPC) using quality-improving chemical additives including calcium nitrate (CN), calcium formate (CF), triethanolamine (TEA) and triisopropanolamine (TIPA). To this end, CN and CF (1, 2 and 3% wt of binder) were added to PPC mortar during the making process, and TEA and TIPA (0.003, 0.006 and 0.01% wt of binder) were added as a solution to the mixture of clinker and natural pozzolan during grinding. The results obtained from compressive strength tests illustrated that, on average, PPC samples containing 15% natural pozzolan led to a 2.7% decrease and a 17.3% increase in the compressive strength respectively compared to OPC with 1% CF and 0.01% TEA. Accordingly, for cement production, clinker can be reduced by 15%, and natural pozzolan be replaced; the reduction in resistance caused by adding natural pozzolan can also be compensated by using chemical additives. Hence, the possibility of replacing 15% of natural pozzolan with clinker, while maintaining the quality of produced cement and reducing the emission of 135 kg of CO 2 per ton of cement production is one of the results of this research.