04.Agregados A 20160315 - Agregados Definicin importancia p...

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02/04/2016 1 Agregados Definición, importancia, clasificación y propiedades para su uso en mezclas de mortero y concreto Volúmenes, hinchamiento en arenas, absorción y agua libre, densidades relativas, pesos unitarios Granulometría y análisis granulométrico Agregados Definición Tamiz N° 4
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02/04/2016 2 Agregados Deben cumplir con normas para optimizar su uso: – Partículas limpias – Duras – Resistentes Durables – Durables – Libres de productos químicos Agregados Masa volumétrica normal – 2200 a 2400 kg/m 3 Agregados de esquisto, arcilla, pizarra – 1350 a 1850 kg/m 3 Piedra pómez (pumita), perlita, vermiculita – 250 a 1450 kg/m 3 (concreto ligero aislante) 250 a 1450 kg/m (concreto ligero aislante) Barita, limonita, otros Concreto de densidad elevada y blindaje para la radiación
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02/04/2016 3 Agregados Agregados
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02/04/2016 4 Agregados Agregados
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02/04/2016 5 Agregados Agregados Definición: material mineral granular que ocupa la mayor parte de la mezcla y que se incorpora por razones de
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02/04/2016 6 Agregados Cemento es aproximadamente 65% del costo del concreto Agregados es aproximadamente 35% del costo del concreto Agregados 60% al 75% del volumen del concreto 70% al 90% de la masa del concreto
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02/04/2016 7 Agregados 50% al 65% deseable del volumen absoluto debe ser aire, agua, cemento y agregado fino C lid d d Contenido de agregado fino: 35% a 45% de la masa o volumen del contenido total de agregado Consolidación adecuada Agregados
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02/04/2016 8 Agregados Agregados Rocas y minerales presentes en los agregados
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02/04/2016 9 Agregados Agregados Indirectamente se determina la resistencia a compresión del agregado American Standard for Testing and Materials (ASTM) ASTM C39: resistencia a la compresión de especímenes cilíndricos de concreto ASTM C31: procedimiento para elaborar y curar el concreto en campo ASTM C192: procedimiento para elaborar y curar el concreto en laboratorio
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