Estudo da avaliação técnica e ambiental de concretos produzidos com CP II F-40 e CP IV-32 RS

Abstract

Concrete is the most widely used material in civil construction, being essential due to its strength, durability, and characteristics, and it undergoes constant changes for better mechanical and environmental performance. This study aims to analyze the technical and environmental feasibility of partially or totally replacing the Portland composite cement with filler (CP II F-40) by the pozzolanic Portland cement resistant to sulfates (CP IV-32 RS) in the production of ready-mixed concrete. The research was conducted through experimental tests carried out in the laboratory, where cylindrical concrete specimens were molded using different cement replacement ratios. The mechanical properties were evaluated through compressive strength tests at 28 and 56 days of curing, according to ABNT standards. Additionally, a Life Cycle Assessment (LCA) with a cradle-to-gate approach was performed using the SimaPro software and the Ecoinvent 3.11 database, in order to quantify the carbon dioxide equivalent (CO2-eq) emissions associated with each concrete mix. The results showed that all concretes reached the design compressive strength of 35 MPa, and that the mix with total substitution by CP IV-32 RS presented similar mechanical performance to the reference mix, while achieving lower CO2 emissions. Therefore, it was verified that the replacement of Portland Cement Type II by Portland Cement Type IV/V is both technically feasible and environmentally advantageous, contributing to reducing the environmental impact of concrete production and promoting more sustainable practices in the construction industry.