CONCALC - Dosagem de concreto de cimento portland

Abstract

The dosage of Portland cement concrete involves experimentally determining the quantities of each input necessary for preparing the concrete, which includes Portland cement, fine aggregates, coarse aggregates, water, additives, and supplementary materials. CONCALC was developed to streamline and facilitate the dosage of Portland cement concrete, aiming for material efficiency, quality, safety, and speed. CONCALC was created with consideration of the requirements and criteria specified in the technical standards of ABNT, namely: (NBR 7212, 2021), (NBR 12655, 2022), (NBR 5738, 2016), (NBR 5739, 2018), (NBR 6118, 2023). Its use requires prior knowledge of material characteristics such as specific gravity and grain size, as well as an understanding of material "packing" and concrete workability. CONCALC was developed using Microsoft Excel and is characterized by its intuitive and user-friendly interface. To verify the effectiveness of CONCALC, this work includes a practical example of its use, along with a real demonstration of the results obtained. CONCALC was used to dose the concrete for the pillars of a building in the urban area of Juiz de Fora, MG, CAA II. The dosed concrete was C25, for which three mixes (lean, basic, and rich) were calculated, yielding strengths at 28 days of 27.9 MPa, 33.85 MPa, and 35.85 MPa, respectively. This concrete will be used for the repair and reinforcement of concrete pillars that have degraded over time, and CONCALC proved effective in calculating the concrete mix for this purpose. CONCALC can be requested via email at pedrohenriqueoc@hotmail.com.