Evaluación del comportamiento eléctrico y mecánico del hormigón con adición de residuos de café como sustituto parcial del agregado fino.

Abstract

In this thesis project, the electrical and mechanical behavior of concrete incorporating coffee biochar as a partial replacement for fine aggregate was evaluated. Two standards were applied: AASHTO T 358-21, known as the Wenner method, to measure electrical resistivity, and ASTM C39 to determine compressive strength. To obtain the coffee biochar, tests were conducted at different temperatures, and based on previous studies, it was concluded that the optimal temperature for its production should be above 300 °C. In order to analyze the effect of the partial replacement of fine aggregate with coffee biochar, four types of mixes were prepared: one conventional concrete mix and three mixes with different replacement levels (5%, 10%, and 15%). The samples were tested at two different ages, which allowed the observation of variations in concrete properties over time.