Análisis comparativo de la resistencia a la compresión de hormigón, utilizando aditivos superplastificantes sobre la base de naftalenos y policarboxilatos aplicados en la empresa Concretos Chimborazo de Quito

Abstract

The objective of the project is the comparative analysis of the compressive strength of ready-mixed concrete, with naphthalene-based admixture and polycarboxylate-based admixture, within the UCEM company. Providing the concrete industry with a theoretical basis on the behavior of concrete with cement contents between 250-350 kg⁄m^3 and their due dosages in % of admixtures within their designs. A database was generated on the compressive strength of the specimens at ages 7 and 28 days, density in fresh and hardened state, diameters and lengths of the specimens, slump and the characterization of the raw materials used in the mixtures, according to the cement content present in each design under the ACI regulations and the percentages of admixtures according to the technical data sheets of the admixtures provided by the manufacturer. Finally, a statistical analysis was performed under ACI 214-R11, NTE INEN 1573, NTE INEN 1855-1 and NTE INEN 1855-2, of the results of the compressive strength, providing information for the calculation of the standard deviation, coefficient of variation and the construction of normal distribution graphs; parameters that denoted the quality control of the mixtures, the efficiency and behavior of the hardened concrete according to the cement content and the admixture applied within its design.