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Vibratory smoothe roller compactor versus smoothe plate compactor
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<blockquote data-quote="TriHonu" data-source="post: 71408" data-attributes="member: 897"><p>While I am not an expert on compaction, I will point you in the right direction.</p><p>Vibratory plates are primarily used for granular soils. They "compact" these soils by vibrating the grains to rearrange them. Smaller particles will move into the spaces between the larger particles thus displacing air and increasing the density. They are not recommended for cohesive soils (clay and silt).</p><p>Vibratory plates for skidsteers will normally have a width wider than the loader. Even when used on granular soils, they require significant force to move them while compacting. They work much better on tracked loaders which can provide enough tracktive force to move them without digging into the grade.</p><p>Clay and silt soils have very small particle sizes. These particles tend to slide past one another, especially if there is any moisture present. To densify these soils, normally you must use impact, pressure or kneading with pressure. This equates to rammers or low frequency sheepsfoot rollers.</p><p>I know the early version of Bobcat's Rollers where a sheepsfoot drum that you could bolt a smooth drum shell over the sheepsfoot drum. I have never run one. When talking to others who have run them, they got marginal reviews. Basically, "If that's all you can afford, go for it." Carefully inspect the drum carrier bearings as they are a weak point on the attachment. Every used one I looked at needed bearings. Also note that the drum can not be run flush to walls or anything above grade since the drum supports are wider than the drum. </p><p>Even with a sheepsfoot attachment you still have to move it across the pad. I don't know of any that have power to turn the drum. The loader will have to be able to move itself and drag the attachment without tearing up the pad.</p><p>What was recommended were walk-behind double drum vibratory sheepsfoot rollers. RAMMAX makes a quality unit. They will cost more than any attachment due to having their own engine and hydraulic and hydrostatic systems.</p><p>I would recommend speaking to excavation reps or rental yards in your area. Then rent and test before buying.</p></blockquote><p></p>
[QUOTE="TriHonu, post: 71408, member: 897"] While I am not an expert on compaction, I will point you in the right direction. Vibratory plates are primarily used for granular soils. They "compact" these soils by vibrating the grains to rearrange them. Smaller particles will move into the spaces between the larger particles thus displacing air and increasing the density. They are not recommended for cohesive soils (clay and silt). Vibratory plates for skidsteers will normally have a width wider than the loader. Even when used on granular soils, they require significant force to move them while compacting. They work much better on tracked loaders which can provide enough tracktive force to move them without digging into the grade. Clay and silt soils have very small particle sizes. These particles tend to slide past one another, especially if there is any moisture present. To densify these soils, normally you must use impact, pressure or kneading with pressure. This equates to rammers or low frequency sheepsfoot rollers. I know the early version of Bobcat's Rollers where a sheepsfoot drum that you could bolt a smooth drum shell over the sheepsfoot drum. I have never run one. When talking to others who have run them, they got marginal reviews. Basically, "If that's all you can afford, go for it." Carefully inspect the drum carrier bearings as they are a weak point on the attachment. Every used one I looked at needed bearings. Also note that the drum can not be run flush to walls or anything above grade since the drum supports are wider than the drum. Even with a sheepsfoot attachment you still have to move it across the pad. I don't know of any that have power to turn the drum. The loader will have to be able to move itself and drag the attachment without tearing up the pad. What was recommended were walk-behind double drum vibratory sheepsfoot rollers. RAMMAX makes a quality unit. They will cost more than any attachment due to having their own engine and hydraulic and hydrostatic systems. I would recommend speaking to excavation reps or rental yards in your area. Then rent and test before buying. [/QUOTE]
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Vibratory smoothe roller compactor versus smoothe plate compactor
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