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RESUMEN Las modernas instalaciones destinadas a la crianza intensiva de ganado porcino se construyen con elementos premoldeados de hormigon ensamblados in situ en grandes superficies techadas; estan sujetas a un ambiente agresivo por los excrementos y vapores que el ganado porcino produce, produciendose un recambio prematuro de piezas por la escasa durabilidad de las mismas. El trabajo presenta los resultados del estudio realizado sobre elementos premoldeados de hormigon (sin uso) que conforman la estructura, con el objetivo de verificar su comportamiento en las condiciones de servicio y realizar recomendaciones para asegurar su correcto desempeno. Se extrajeron testigos de las piezas y se midieron la resistencia a compresion, velocidad de pasaje de onda ultrasonica, absorcion capilar, absorcion y permeabilidad al aire. Los resultados obtenidos permiten calificar al hormigon entre regular y bueno y se presentan las recomendaciones que deberian considerarse al fabricar los elementos premoldeados para asegurar su durabilidad. Palabras Clave: hormigon; premoldeados; durabilidad; calidad; testigos. ABSTRACT The modern installations for the intensive rearing of pigs are constructed based on precast concrete elements that are assembled on site in large areas covered and which are subject to an aggressive environment and in the feces they produce vapors, causing a premature replacement of parts by the low durability of the same. The paper presents the results of a study on precast concrete (unworn) that make up the structure in order to verify its performance in service conditions and make recommendations to assure its correct performance. Witnesses were extracted from the parts and measured the resistance to compression, speed of passage of the ultrasonic wave, capillary absorption, absorption and permeability to air. The results obtained allow us to qualify to the concrete between regular and good and presents the recommendations should be considered when manufacturing the precast elements to ensure their durability. Keywords: concrete; precast; durability; quality; witnesses.

revista alconpat

Evaluación de elementos premoldeados de hormigón utilizados en instalaciones de crianza de ganado porcino en ambiente agresivo. Recomendaciones de fabricación