Influencia del superplastificante masterease 3900 en la resistencia a la compresión del concreto cemento-arena, elaborado con agregado de Iquitos - 2024
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2025-09-08
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Universidad Científica del Perú
Abstract
En esta tesis se aborda la influencia del superplastificante MasterEase 3900, en las propiedades de resistencia a la compresión y módulo de ruptura del concreto cemento – arena elaborada con cemento APU tipo GU y arena de módulo de fineza 1.66, con un porcentaje que pasa la malla N° 200 de 2.3% y de peso específico 2.642, y con relaciones A/C de 0.50, 0.54 y 0.58; diseñada para una resistencia a la compresión del concreto patrón comprendida entre 245kg/cm2 y 350kg/cm2. Esta investigación es de tipo cuantitativa, de nivel descriptivo explicativo, de diseño cuasi experimental, con 252 probetas entre concreto patrón y experimental, correspondiendo 63 al concreto patrón y 189 al concreto experimental. Las muestras experimentales se obtuvieron adicionando al concreto patrón, dosis de 300ml/bolsa, 500ml/bolsa y 700ml/bolsa de aditivo. Los ensayos de resistencia a la compresión se realizaron a los 3, 7 y 28 días de curado. Para el concreto patrón a mayor relación A/C mayor slump; y para todas las dosificaciones de aditivo a mayor relación A/C se presenta incluso un mayor slump; asimismo, conforme se incrementa la adición de aditivo también se incrementá el slump; y, se observó que al valor más alto de Peso Unitario le corresponde la mayor resistencia a la compresión. Los mejores resultados para resistencia a la compresión se obtuvieron con la adición de 300ml/bolsa y la relación A/C 0.50. Para el concreto patrón la progresión de la resistencia a la compresión alcanzada a los 3, 7 y 28 días de curado fue de 238 kg/cm2, 293kg/cm2 y 354kg/cm2, respectivamente; y, en el concreto experimental hubo variación, para los mismos periodos, encontrándose valores de 264 kg/cm2, 331kg/cm2 y 414kg/cm2, quedando confirmada la hipótesis.
This thesis addresses the influence of the superplasticizer MasterEase 3900 on the compressive strength and modulus of rupture of cement–sand concrete made with APU type GU cement and sand with a fineness modulus of 1.66, a 2.3% passing through sieve No. 200, and a specific weight of 2.642, with water-to-cement ratios (W/C) of 0.50, 0.54, and 0.58, is addressed. The concrete was designed for a target compressive strength ranging between 245 kg/cm² and 350 kg/cm². This research is quantitative, descriptive-explanatory, and quasi-experimental in design, involving 252 specimens between control and experimental concrete, of which 63 corresponded to the control concrete and 189 to the experimental concrete. The experimental samples were obtained by adding to the control concrete dosages of 300 ml/bag, 500 ml/bag, and 700 ml/bag of the admixture. The compressive strength tests were conducted at 3, 7, and 28 days of curing. For the control concrete, a higher W/C ratio resulted in greater slump; and for all admixture dosages, a higher W/C ratio also produced an even greater slump. Likewise, as the admixture dosage increased, slump also increased. It was observed that the highest unit weight corresponded to the greatest compressive strength. The best compressive strength results were obtained with the addition of 300 ml/bag and a W/C ratio of 0.50. For the control concrete, the progression of compressive strength at 3, 7, and 28 days of curing was 238 kg/cm², 293 kg/cm², and 354 kg/cm², respectively; while in the experimental concrete, values of 264 kg/cm², 331 kg/cm², and 414 kg/cm² were obtained for the same periods, confirming the hypothesis.
This thesis addresses the influence of the superplasticizer MasterEase 3900 on the compressive strength and modulus of rupture of cement–sand concrete made with APU type GU cement and sand with a fineness modulus of 1.66, a 2.3% passing through sieve No. 200, and a specific weight of 2.642, with water-to-cement ratios (W/C) of 0.50, 0.54, and 0.58, is addressed. The concrete was designed for a target compressive strength ranging between 245 kg/cm² and 350 kg/cm². This research is quantitative, descriptive-explanatory, and quasi-experimental in design, involving 252 specimens between control and experimental concrete, of which 63 corresponded to the control concrete and 189 to the experimental concrete. The experimental samples were obtained by adding to the control concrete dosages of 300 ml/bag, 500 ml/bag, and 700 ml/bag of the admixture. The compressive strength tests were conducted at 3, 7, and 28 days of curing. For the control concrete, a higher W/C ratio resulted in greater slump; and for all admixture dosages, a higher W/C ratio also produced an even greater slump. Likewise, as the admixture dosage increased, slump also increased. It was observed that the highest unit weight corresponded to the greatest compressive strength. The best compressive strength results were obtained with the addition of 300 ml/bag and a W/C ratio of 0.50. For the control concrete, the progression of compressive strength at 3, 7, and 28 days of curing was 238 kg/cm², 293 kg/cm², and 354 kg/cm², respectively; while in the experimental concrete, values of 264 kg/cm², 331 kg/cm², and 414 kg/cm² were obtained for the same periods, confirming the hypothesis.
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Concreto cemento-arena, Superplastificante MasterEase 3900, Resistencia a la compresión, Cement–sand concrete, MasterEase 3900 superplasticizer, Compressive strength
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