Influencia del porcentaje y módulo de finura del agregado reciclado de concreto estructural sobre la compresión, adherencia, absorción y densidad en mortero de asiento
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Date
2024-07
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Universidad Nacional de Trujillo
Abstract
Los desechos de concreto constituyen un tipo de residuos de construcción y demolición
(RCD). En el contexto peruano, si existen regulaciones que gestionen de manera adecuada la
disposición y manejo de estos residuos.
Una solución es la producción de morteros utilizando residuos de concreto estructural no
solo soluciona la problemática de la contaminación ambiental, sino que también abarata los
costes de construcción, impulsa la economía circular y estimula prácticas constructivas más
sostenibles.
Se busca evaluar el porcentaje y módulo de finura (MF) del agregado fino reciclado de
concreto estructural sobre la compresión, adherencia, absorción y densidad en mortero de
asiento
En la fase experimental se trabajó con un cemento tipo Ico con la relación cemento: agregado
de 1:4. Se sustituyo agregado fino natural por escombraje al 20, 40, 60, 80, 100%, de dos tipos
de finura 2.5 y 2.8, manteniendo constante la plasticidad del mortero y se hizo una comparación
con el mortero Rapimix preparado de la marca Pacasmayo. Además de ello a ninguno de los
morteros no se les curo, para observar sus propiedades reales que se obtiene en obra.
El MF del agregado reciclado 2.8 presenta un mejor comportamiento que el MF de 2.5,
por lo tanto las características que este presenta son que la compresión y la adherencia son
parámetros de crecimiento en un rango de 0 al 40% de agregado reciclado en sustitución de
arena gruesa, incrementando los valores de 101 Kg/cm² como patrón a 127 Kg/cm² y 10.7
Kg/cm² del mortero patrón a 12 Kg/cm² respectivamente, en el caso de la densidad tenemos
valores de 2575 Kg/m³ como patrón y luego esta propiedad decae y para la absorción de
presenta valores de 10.6% como patrón y luego se va incrementando paulatinamente.
Basándose en los resultados, se concluye que un porcentaje de reemplazo hasta el 40% de
agregado reciclado, combinado con un MF de 2.8, ofrece propiedades óptimas en los morteros
de asiento. estos resultados concuerdan con los resultados obtenidos estadísticamente mediante
el método de análisis de varianza (ANAVA)
Concrete waste constitutes a type of construction and demolition debris (C&D). In the Peruvian context, there are regulations that properly manage the disposal and handling of these wastes. A solution is the production of mortars using structural concrete waste, which not only addresses the issue of environmental pollution but also reduces construction costs, promotes the circular economy, and encourages more sustainable construction practices. We seek to evaluate the percentage and fineness modulus (MF) of recycled fine aggregate from structural concrete on compression, adhesion, absorption, and density in mortar bedding. In the experimental phase, work was carried out with an Ico type cement with a cement: aggregate ratio of 1:4. Natural fine aggregate was replaced with rubble at 20, 40, 60, 80, 100%, of two types of fineness 2.5 and 2.8, maintaining constant mortar plasticity, and a comparison was made with the Rapimix mortar prepared by the Pacasmayo brand. In addition, none of the mortars were cured, to observe their real properties that are obtained on-site. The MF of the recycled aggregate 2.8 shows better behavior than the MF of 2.5. Therefore, the characteristics it presents are that compression and adhesion are growth parameters in a range from 0 to 40% of recycled aggregate replacing coarse sand, increasing the values from 101 Kg/cm² as a standard to 127 Kg/cm² and from 10.7 Kg/cm² of the standard mortar to 12 Kg/cm² respectively. In the case of density, we have values of 2575 Kg/m³ as a standard, and then this property decreases, and for absorption, it presents values of 10.6% as a standard and then gradually increases. Based on the results, it is concluded that a replacement percentage of up to 40% of recycled aggregate, combined with a fineness modulus of 2.8, offers optimal properties in bedding mortars. These results are consistent with the results obtained statistically through the analysis of variance method (ANOVA).
Concrete waste constitutes a type of construction and demolition debris (C&D). In the Peruvian context, there are regulations that properly manage the disposal and handling of these wastes. A solution is the production of mortars using structural concrete waste, which not only addresses the issue of environmental pollution but also reduces construction costs, promotes the circular economy, and encourages more sustainable construction practices. We seek to evaluate the percentage and fineness modulus (MF) of recycled fine aggregate from structural concrete on compression, adhesion, absorption, and density in mortar bedding. In the experimental phase, work was carried out with an Ico type cement with a cement: aggregate ratio of 1:4. Natural fine aggregate was replaced with rubble at 20, 40, 60, 80, 100%, of two types of fineness 2.5 and 2.8, maintaining constant mortar plasticity, and a comparison was made with the Rapimix mortar prepared by the Pacasmayo brand. In addition, none of the mortars were cured, to observe their real properties that are obtained on-site. The MF of the recycled aggregate 2.8 shows better behavior than the MF of 2.5. Therefore, the characteristics it presents are that compression and adhesion are growth parameters in a range from 0 to 40% of recycled aggregate replacing coarse sand, increasing the values from 101 Kg/cm² as a standard to 127 Kg/cm² and from 10.7 Kg/cm² of the standard mortar to 12 Kg/cm² respectively. In the case of density, we have values of 2575 Kg/m³ as a standard, and then this property decreases, and for absorption, it presents values of 10.6% as a standard and then gradually increases. Based on the results, it is concluded that a replacement percentage of up to 40% of recycled aggregate, combined with a fineness modulus of 2.8, offers optimal properties in bedding mortars. These results are consistent with the results obtained statistically through the analysis of variance method (ANOVA).
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TECHNOLOGY::Materials science::Other materials science