Descripción
Es una banda termoplástica de cloruro de polivinilo de color verde, para sello de juntas en estructuras de concreto, posee estrías que proporcionan un mejor sellado y retienen filtraciones, EUCO BANDA PVC O cuenta con dos semibulbos laterales y un bulbo central que permiten un adecuado anclaje para soportar movimientos estructurales.
Aplicaciones Principales
EUCO BANDA PVC O es recomendada para todo tipo de juntas en edificaciones de concreto sometidas a movimientos estructurales y presiones hidrostáticas donde se requiere de impermeabilidad total.
Las estructuras típicas de concreto que requieren de EUCO BANDA PVC O son:
- Tanques de almacenamiento.
- Plantas de tratamiento de agua.
- Presas, esclusas.
- Canales, vertederos, albercas, túneles, cimentaciones.
- Estructuras de contención, losas de azotea.
Ventajas
- Máxima seguridad e impermeabilidad en todo tipo de juntas.
- Alta resistencia química a aguas cloradas, ácidas, alcalinas, asfaltos, grasas y demás sustancias corrosivas y agresivas.
- No presenta ninguna reacción química con el concreto.
- Excelente durabilidad por su alta resistencia al envejecimiento.
- Fácil y rápida colocación en obra y pegado de empalme.
- Los ojillos metálicos colocados en las lengüetas facilitan la fijación al acero de refuerzo.
- Resistente a intensos y frecuentes movimientos de la junta.
Información Técnica
(1) El valor de la elongación última corresponde a los resultados del ensayo hecho en las condiciones establecidas por la ASTM D-638. El valor absoluto de elongación en obra puede variar en función de factores como: espesores de la cinta, espacio libre de la junta, forma de colocación de la cinta.
Vida en Anaquel
12 meses a partir de la fecha de fabricación siempre y cuando se almacene bajo techo, en un lugar fresco y seco
sobre tarimas.
Envase / Rendimiento
EUCO BANDA PVC O se fabrican en rollos de 25 m de largo y en anchos de 4”, 6”, 7 ó”, 9” y 12”.
Por cada metro de junta a tratar se requiere de un metro de EUCO BANDA PVC O.
Instrucciones de uso:
EUCO BANDA PVC O debe tener el tamaño y diseño correcto para permitir el movimiento esperado y sellar perfectamente la junta de la estructura de concreto.
a) Selección de la Banda:
Ancho máximo
El ancho de la banda no debe ser mayor al espesor de concreto en que será colocada.
Ancho mínimo
El ancho de EUCO BANDA PVC O no debe ser menor a seis veces el tamaño del agregado máximo, más, el ancho de la misma junta. Ejemplo: en una junta de 2″ (5.08 cm) donde el agregado máximo del concreto será de 3/4″ (1.9 cm), el ancho mínimo de Banda P.V.C debe ser (6 x 3/4″) + 2″ = 6 1/2″ (16.5 cm). EUCO BANDA PVC O no debe ser menor de 6 1/2″ (16.5 cm).
a = tamaño máximo del agregado
b = varilla de refuerzo
w ; no mayor que t
w ; no menor que 6a + j
b) Punto correcto de colocación de la banda. La distancia de la superficie del concreto en contacto con agua, al punto donde la banda será colocada, no debe ser menor a la mitad del ancho de la banda. Ejemplo: En una losa de 30 cm de peralte en la que deberá usarse banda de 6” (15 cm), ésta debe ser colocada a una distancia mínima de 7.5 cm de la superficie.
La distancia mínima entre el acero de refuerzo en el concreto y la banda, debe ser dos veces el tamaño del agregado máximo. Ejemplo: En un concreto con agregado máximo de 1 1/2” (3.8 cm), la distancia entre el acero de refuerzo y la banda debe ser de 3” (7.5 cm).
Tipos de junta
Junta de Contracción: Su función es permitir que la losa se abra precisamente en este lugar cuando el concreto se
contrae.
Junta de Expansión: Permiten al concreto expandirse o contraerse debido a variaciones en la temperatura y
humedad ambiente. Estas juntas deben contener relleno comprimible “BACKER ROD”, para absorber los
movimientos de expansión del concreto.
Juntas Verticales: Colocar EUCO BANDA PVC O de forma perpendicular a la junta en la parte central de la sección
transversal del elemento, pase alambre recocido por las perforaciones y sujételo del acero de refuerzo del elemento.
Cuide que la banda quede tensa y bien alineada.
Modificar la cimbra de la sección transversal con el fin de que solo quede embebida la mitad de la sección de la cinta,
luego, colar el muro, retirar la cimbra y colar el elemento adyacente dejando embebida la otra mitad de banda en el
concreto.
Juntas Horizontales: En todos los casos se recomienda colocar EUCO BANDA PVC O en el centro de las placas o
muros soportándola con alambres y/o puntillas por las estrías laterales al refuerzo de tal forma que al vaciar el
concreto, no pierda su correcta posición.
Unión de EUCO BANDA PVC O
Las uniones entre tramos se realizan haciendo corte a escuadra de las bandas que serán unidas y se aplica calor a
los tramos con plancha de calentamiento o pistola de aire caliente para que se funda el PVC; se enfrentan las partes a
soldar y se pegan haciendo presión, quedando de esta manera realizada la soldadura.
El exceso de temperatura es perjudicial para la pega, por lo tanto se deben hacer ensayos previos. La temperatura de
pega es aquella en la cual EUCO BANDA PVC O se funde sin formar burbujas o espuma.
Precauciones / Limitaciones
- Tenga al alcance un extinguidor tipo ABC.
- Para colocar y fijar este producto es necesario el uso de equipo de seguridad como: guantes de carnaza, lentes de seguridad, camisola de algodón de manga larga.
- EUCO BANDA PVC O debe almacenarse bajo techo y protegidas de la intemperie y elementos que la puedan
deteriorar. - La altura máxima recomendada para estibar el material es de 6 rollos.
- No deje EUCO BANDA PVC O expuesta a intemperie por periodos largos de tiempo.
- Para la unión de diferentes tramos de EUCO BANDA PVC O no se deben hacer traslapes.
- El bulbo de la cinta siempre debe estar centrado con respecto a la junta.
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enremalfolk1983 –
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hallcalcongju1971 –
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erclusrassmen1980 –
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nciduncabne1973 –
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