Influence of the Addition of Carob Ash to Concrete Under High Water Pressure

Zelada R.Y.P.; Ubillus G.S.S.; Huaricallo Y. · Mathematical Modelling of Engineering Problems (2025) · DOI: 10.18280/mmep.120520

Resumen

This study evaluates the effect of incorporating carob ash as a partial addition to a concrete mix with a strength of f’c = 210 kg/cm2, focusing on improving its mechanical behavior and resistance to water penetration under pressure. The main objective was to determine how percentages of 3%, 6%, 9%, and 12% ash influence the compressive strength, diametrical compressive strength, modulus of elasticity, and impermeability of concrete. To this end, 141 cylindrical specimens were prepared, and tests were performed according to ACI, ASTM, and UNE-EN standards, using a quantitative approach and quasi-experimental design. The results demonstrated that the addition of 6% carob ash produced significant improvements in mechanical properties: reaching 269.40 kg/cm2in compression, 36.24 kg/cm2in tension, and a modulus of elasticity of 276,983.01 kg/cm2. It also presented the lowest water penetration depth at 72 hours, demonstrating greater durability and impermeability. In contrast, higher dosages (9% and 12%) showed a decrease in overall performance. It is concluded that 6% is the optimal dosage, not only due to its technical benefits but also for its contribution to sustainability by recovering available agro-industrial waste, offering an economical, ecological, and effective solution to the limitations of traditional concretes.

Instituciones: Universidad Privada del Norte