Small stones for mixing in concrete.
yes
unit wight of 20mm aggregate
why is batching of aggregate by weight is preferable than batching by volume
Aggregate is a process of combining separate objects to make one object or mass. A house, as an example is an aggregate of wood, insulation, nails, shingles, etc. The whole mass is considered a house, workshop, utility shed, or even garage. Aggregate weight would be the overall weight of combining several separate objects. As an example, five people getting onto an elevator would have a combined (aggregate) weight. Their individual weights added together, but separateley, they have their own individual weight.
It mean the total weight of the cargo. Example if your total gross weight was 80, 000 pounds and your truck and trailer weighs 40,000 pounds empty, your aggregate weight is 40,000 pounds.
One ton
The weight varies depending on the size of the crushed concrete. Large pieces typically have a calculated weight range of 120 to 130 lbs per cubic foot (i.e. rip rap, rubble) while smaller pieces have a calculated weight range of 135 to 145 lbs per cubic foot (i.e roadbase, soil stabilizer). The reason for the difference is that a cubic foot of large aggregate is not as dense and small aggregate because large aggregate does not compact as tightly as the small rock, creating voids between the aggregate.
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bulking of fine aggregate increases its volume. hence the mass for a given volume is less, which leads to richer mix than required. therefore batching of fine aggregate must be done by weight and not by volume.
According to Florin Perkins Quarry in Sacramento Ca. Aggregate Base Weight is 1.92 tons per CY and their Recycled Aggregate Base is 1.89 per CY. The weight is pretty consistent. These products are checked once a year.
When aggregate demand and aggregate supply both decrease, the result is no change to price. As price increases, aggregate demand decreases, and aggregate supply increases.
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