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Type 1 is a reference to a specification for crushed stone fill used in civil engineering. Without going into detail (and you don't need to) the phrase Type 1 is used by aggregate suppliers to describe a graded aggregate containing crushed fragments of rock between 75mm or 50mm down to dust and every size between. Grading refers to the presence of many sizes of particles as opposed to 'single' size aggregate. The smaller pieces fill the gaps between the larger pieces to create a dense compact fill. The variation in the grading means that the density of Type 1 can vary. In most engineering calculations the density of such granular is taken to be between 1.8 and 2.0 tonnes per cubic metre. From this density you can work out the weight of material required to fill a given volume.

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14y ago
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Q: How much Type 1 stone will fill what area?
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