22 November 2022 gotranscript audio test passed

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The commercial unit of measurement of cement is the barrel. The unit of shipment is the bag. A barrel of Portland cement contains 380 pounds of cement, and the barrel itself weighs 20 pounds. There are four bags, either made from cloth or paper cement to the barrel, and the regulation cloth sack weighs one and a half pounds. Now, the size of cement barrels varies due to the differences in the weight of cement and the differences and to differences in compacting the cement into the barrel. A light-burned Portland cement weighs 100 pounds per struck bushel. However, I have only a heavy burned port Portland cement that can weigh from 118 to 125 pounds per struck bushel. The number of cubic feet of packed Portland cement in a barrel ranges from three to three and a half.

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I can just hear you asking what is a struck bushel. Well, believe it or not, it’s also called a US bushel and it’s equal to 2150.42 cubic inches or 35,245.38 cubic centimetres. It’s considered the equivalent of the Winchester bushel, a measure used in England from the 15th century until 1824. A US-level bushel is made up of four pecks or 32 dry quarts. Two bushels make up the unit called a striker.

Natural cement is lighter than Portland cement. A barrel of Louisville, Akron, Utica, or other Western natural cement contains 265 pounds of cement and weighs 15 pounds. A barrel of Rosendale or other eastern cement contains 300 pounds of cement and the barrel itself weighs 20 pounds. There are three and three-quarters cubic feet in a barrel of Louisville cement. Usually, there are three bags to a barrel of natural cement.

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A particular construction for automatic bucket hoist is that shown in the accompanying illustrations, but let me describe them for you in case you can’t see them. The bucket is held upright by guides at its front and rear edges. to dump it out. A section of the front guide is removed at the desired dumping point, which allows the bucket to overturn as shown. A friction crab hoist operated from the mixer engine runs the bucket.

The foot of the hoist is set in a pit with the mixer at surface level, but the hoist can be set on the surface and the mixer mounted on the platform. In the latter case, a Charging Bucket travelling from a stockpile of an inclined track to the mixer platform is generally used. A hoist like this, equipped with a half cubic yard Ransome mixer will cost about 1500 bucks and will deliver 15 cubic yards of concrete per hour.

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Want to know the secret to good concrete? Well, after the selection of good materials, thorough mixing and hard camping is key. Each batch of concrete consisting of about 1.2 cubic yards has to be turned in the mixer for not less than two minutes, at the rate of nine revolutions per minute. The amount of tamping is indicated by the fact that about nine men out of 52 on each shift did nothing but tamp.

A common mistake to many worksites make to assume that the volume of concrete produced is equal to the quantity of stand sand plus the gravel as indicated in the proportion.

Sometimes the sand lodges in the voids between the pebbles. If six cubic yards of concrete are desired, nine times out of 10 It will be necessary to use 2.7 cubic yards of sand and 5.34 cubic yards of gravel.

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