how many blocks can come out of a bag of cement?
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1 bag of cement can lay approximately 70 to 80 cement blocks.
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A 60 lb. bag provides 0.45 cubic feet of cured concrete. A 80 lb.
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Normal range for amount of water used to mix each 50 kg bag of cement is between 20 liters and 30 liters (94 lb. bag of cement is between 4.5 gal. and 7 gal.) The water-tightness of concrete depends primarily on the water-cement ratio and the length of moist curing.
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That being said, one bag of mortar, weighing 70 lbs. Mixed with sand in the proper 3 to 1 ratio will lay 40 twelve inch blocks or 50 eight inch blocks. So, if laying 8 inch block, you should be able to lay 100 blocks with 2 bags of mortar.
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An 80# bag of concrete mix yields about . 6 cubic feet of concrete. So one cubic yard of concrete requires about 45 bags of mix.
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['3.898 in. bore blocks (1997–2005) ... ', '3.78 in. bore blocks (1999–2007) ... ', '4.00 in. bore blocks (1999–2007)']
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30 cubic feet, 60 pounds of concrete mix yields . 45 cubic feet and an 80-pound bag yields . 60 cubic feet.
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However, if your project includes imperial bricks (potentially 225 x 110 x 73mm), you will need approximately 57 per square metre. For standard UK blocks (440 x 215 x 100mm), you will require ten blocks per square metre.
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30 cubic feet, 60 pounds of concrete mix yields . 45 cubic feet and an 80-pound bag yields .
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To determine how many bags of concrete you will need, divide the total cubic yards needed by the yield. Use the following yields per each bag size: 40 pound bag yields .011 cubic yards. 60 pound bag yields .017 cubic yards.
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We have now cut down to 1/2 a cubic metre apparently. The consensus for 1/2 a cube seems to be, 1 tonne sand, 14 bags cement. This should give 3:1 BY VOLUME!
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- It's known that a 5 "bag/sack" mix will achieve approx. 3000 psi compressive strength at 28 days if cured properly. - It's known that a lower water : cement ratio is advantageous.
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Sizes may vary but the standard packs are either 10 inches by 10 inches, 5 inches by 5 inches, or 2.5 inches by 2.5 inches. So just decide what size blocks you would like to build with.
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One 94 lb. bag of Portland Cement makes 4.5 cubic feet of concrete.
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45 cubic feet and an 80-pound bag yields . 60 cubic feet. One 50-pound bag of Quikrete Fast Setting Concrete Mix yields about .
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Choose the mixer size most appropriate for the size of the job to be done • Allow at least 1 cu ft (28 L) of mixer capacity for each 80 lb (36.3 kg) bag of QUIKRETE® Concrete Mix to be mixed at one time • For each 80 lb (36.3 kg) bag of QUIKRETE® Concrete Mix to be mixed, add approximately 6 pt (2.8 L) of fresh water ...
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Pure cement, sand and crushed rock all have about the same density, so a block of pure cement measuring 1 cubic yard of volume (about 3,600 pounds) will contain 45 bags of cement.